4l80e 2nd Gear Launch

High pressure high flow low band apply. This is a little over my head but first gear in this tranny is very deep (4. The Intermediate Clutch is engaged in 2nd gear Auto as well as 3rd, so that should be ruled out. 63 for the 4L60e so a little bit of gear is lost there too. This valve body requires a Dual Ring Billet 2nd Gear Servo & a low reverse billet servo. I just got my lq4/4l80e Geo Tracker swap on the road. We are a premium auto parts manufacturer and supplier. Cortana is about to get a lot more chatty, with Microsoft launching a new Play My Emails feature for its assistant at Ignite 2019 today. Yes 0 mph its just the computer is sllllooooowwwww. CT Powertrain Products. Car is a daily driver. 48:1 1st gear is because it is very much related to the 3l80e and turbo 400 trans. As for versatility, there are tons of available First gear ratios that make it easy to tailor the trans to the rest of the engine and drivetrain elements – and a big-torque engine doesn’t need. One of the most critical elements of any GM street/strip or towing application is acceleration. It could be used to improve 0-60 times by allowing a higher 2nd gear limit to just hit 60 mph / 100 km/h in 2nd, whilst preserving the lower rev limit in other gears. The European-Russian ExoMars 2020 mission will have to find some parachute fixes fast if it wants to be ready for launch next summer. Before it was jerking after it would get warm,then it would not stop until u let it cool. This page provides information on how the 4L80E automatic transmission from General Motors operates with the MegaShift™ controller, as well as the TunerStudioMS settings needed to configure the controller. But a few times, first time was at autocross at the start, when I try an aggressive launch, the car shutters and the gear lever popped out of 1st. As soon as the lights change to Green the average TorqueCars member takes around 1. Personally I like having the extra kick the 4L60E 1st gear has. I did a bit of testing and the trans subsequently packed in and left me with only 2nd and weirdly, 4th and TCC lockup. The torque converter can be locked up in 2nd, 3rd, and 4th forward ranges if necessary. Coming in December there will also be a Euro 6d-T compliant petrol unit. The real question should be, should you ever start in 2nd? The clutch pedal can vary the torque transmitted from the engine to transmission anywhere from 0 to so. In a simplified manner of speaking, the 4L80E is just a TH400 with O/D gear. No walk case bushing. The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. And after a decade of loyal service my trusty. It has the 6. i did a lot of research and from what ive come up with it seems that the straight cut gears develop a wear pattern that makes this noise but its not bad for the tranny. 0l which is 4l80e equiped, I did a trans segment swap. Problem shifting 2nd to 3rd gear on automatic transmission, shift solenoid (2000 Chevrolet Silverado 1500) Have check engine, the computer says it needs the shift solenoid, the problem is it will not shift from 2nd to 3rd gear on an automatic transmission. To dual feedremove the center lip seal on the apply piston, remove the 2nd sealing ring on the center support, and plug the case hole to the right of the center support bolt. In other words the close ratio gear set will only have 88. Our transbrake option can be built as a full manual unit or as an automatic unit with full automatic shifting capabilities when coupled with one of our electronic controllers. I thought you were after the 1st gear ratio of the 4L80E. 34 starting gear is not that bad. this means that dimension "C" is usually longer than dimension "B". You can feel it start to slip from 1st to 2nd and from 2nd to 3rd when pushing on it for awhile. If you end up with a bad sprag, the 4L60E won't be able to shift into 3rd or 4th gear. All other gears shiuft smoothly, but going into 2nd is kind of a rough shift like I feel as if I'm forcing it in there. builds up slowly, reducing the shift shock when there is a shift from first to second gear Accumulators - 2-3 The 2-3 accumulator reduces shift shock when shifting from second to third gear. Like the 4L80E transmission, it was an upgrade to the TH400 three-speed transmission from GM. it shifts into 2nd and does not attempt to go into 3rd. : during burnout, etc. I have charged the fliud (World standard) twice and can not tell any big differance. Check your pressure if you can find out what its supposed to be at your cooling line. I have a 93 one ton chevy with a 4l80e , my truck would not go into third gear or overdrive. Pinion Angle: Pinion angle is the difference between the driveshaft angle and the pinion angle on the differential. 38 2nd gear = 1. I have a 6L80E in a 2011 Camaro SS that has been modded, and tuned with EFILive. 7 liter gas engine or the 6. If you plug in the gear ratios including final drive and tire diameter in a calculator, shifting at 7000RPM pegs second gear at 43 MPH, so you still need to reach for 3rd to get to 60 so it will probably be around 6. Buthow did it come about?. We are a premium auto parts manufacturer and supplier. Condition/Concern:. I dont think a 2nd gear launch works with the traditional 2 relay wiring or JMS digital trans brake. This is extremely valuable in heavy duty truck applications, since this band is used to hold back when the transmission is manually put into 2nd gear while descending steep grades, etc. Has anyone done a LS swap in a 2nd gen F-body or any car really, using a LS2/6l80e combo? I ask because I'm trying to decide on what gear ratio to go with. Even 3rd stays hooked all the time now. 0 sec AND Commanded Gear = 4/ with TCC Locked. Install in 15 minutes. Other than that it seems to shift fine, doesn't make any horrible noises or anything. One of the most critical elements of any GM street/strip or towing application is acceleration. I am planning to get the GenT Turbo supplied and fitted to my car in a couple of months and I need a strong auto. 4th oil uses one passage while 2nd oil uses the other. This comes at the expense of a shallower first gear, however, which hurts low end acceleration. 70 to 1 overdrive ratio. The 1-2 shift is almost violent. info1 Shifts: Complaints/Corrections 3rd gear start and bind in "1" clutch pack is the problem. This manual is an absolute necessity for every serious transmission technician in todays working environment. 3) Before thinking that you need an overdrive transmission, think about changing the rear-end ratio! As an example, you could have a TH400 built with a lower first and second gear to get a better launch, and yet the final transmission ratio is still 1 to 1. Many parts interchange between the 400 turbo and 4L80E. Sloppy Mechanics Wiki 4l80e sloppy transbrake (3rd gear spool mod) Now, I had alot of help getting this working from LS1 tech members and tons of info from a trans guy, wanted to let you know that first! thank you for the community for helping me out, i wired it in, tested it and ill show you how i did it. Shorted second gear control solenoid; Faulty transmission controller (PCM) Tips and Fixes. If this is your first visit, be sure to check out the FAQ by clicking the link above. The 4L80E is the descendant of the “Ole Reliable” TH400 transmission. I was there when he rebuilt it and changes all the clutches and bands drums low reverse i mean everything is is good condition i dont think its anything broken/worn out. of torque, weigh a mere 70 pounds (dry), feature a 26-spline input shaft and are available in six gear configurations with a low 1st for a good dig on launch and close spacing between 2nd and 4th to keep your engine in its power band. Pictured below are just a few of the Updates & Upgrades that go into each 4L80E Transmission. If you plug in the gear ratios including final drive and tire diameter in a calculator, shifting at 7000RPM pegs second gear at 43 MPH, so you still need to reach for 3rd to get to 60 so it will probably be around 6. Kate, 37, reportedly feels sorry. Never rebuilt it again, finally sold it. GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. 2nd gear on the 4L80e is also a little higher (numerically lower) @ 1. No walk case bushing. I understand out of the whole I shouldn't expect exciting launches, but will it hurt anything? Currently have a stock TH400 in a 3600lbs Nova that is a street car. The 4L80-E (and similar 4L85-E) is a series of automatic transmissions from General Motors. I did a lot research, if I swap the Front Carrier, Front Ring Gear, Sun Gear from A999 to 904 I will have lower Gear Ratio on both 1st and 2nd Gear, the ratio will be 2. • A Marmon/Berkshire Hathaway Company SC-4L80E-IN_G 02-13-19. At Jake's Performance the 4L80E is our most popular transmission. 700R4/4L60E's have a low 3. Those of you who launch in 2nd gear, what is the trick. 4l80e transmission electrical problems C/K Car Forums. Camaro Forums at Z28. After driving about 8-10 miles the trans acts like it is going into neutral. Hideo Kojima’s long-awaited Death Stranding has stormed to second place in the UK sales chart. (2 springs) 4L80E repeated solenoid B code 86 or 87, no 3rd or 4th gear can be caused by low signal pressure to shift solenoids A and B. Braking when selector lever is moved to the Manual 2nd position, because the apply pin is not long enough to apply the band. 5-5-09 : I have a 1992 van with a 350 engine and a 4L80E tramsmission. He decided to roast the front tires of his seriously modified Saab 9-3 Aero (405whp). Throttle engine, rear tires start spinning really fast then I am experiencing engine braking and it "finds" first gear. GM 4L80E technical information The 4L80E transmission is a four speed automatic with torque converter clutch. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. I had to select the up-shift to get back into fourth. Sloppy Mechanics Wiki 4l80e sloppy transbrake (3rd gear spool mod) Now, I had alot of help getting this working from LS1 tech members and tons of info from a trans guy, wanted to let you know that first! thank you for the community for helping me out, i wired it in, tested it and ill show you how i did it. Jump to Latest I have done very little testing and was just wondering if anybody has figured out how to launch the hellcat perfectly. “I was the second customer this morning. 0 engine and 4l80E transmission. This is a street car that is setup for 1/8 mile and I run out 3rd gear so very seldom shift 4th,5th or to 6th under full power. 55 configuration delivering better performance and consistency in racing applications. Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. If it does. Stage II: This transmission includes everything listed in Stage 1 PLUS this transmission gets updated to the dual-fed-direct circuit, PLUS increased friction count in the direct drum with 7 Alto Red Eagle frictions (factory only has 5), PLUS increased friction count in the intermediate or 2nd gear clutch pack with 6 Alto Red Eagle racing. Minor ECM tweak permits transmission brake activation in D2 range for second gear start capabilities. A 4L65E will have the same low gear as a 4l60E. Release oil for the rear servo in THM 400 and it's four speed successor, the 4L80E, also happens to be apply oil for the second clutch. national leaders announced plans to launch a development bank intended—we are talking long term. I thought you were after the 1st gear ratio of the 4L80E. Shift Rite Transmissions replacement for 4L80E 97-03 Updated Transmission Valvebody MT1 Shift Rite 4L80E. Kazuki Kazama (voiced by Masaki Masaki) can be. Made from 6061-T6 aluminum alloy, the shield offers you dependable strength that is 2nd to none. The 1-2 shift is almost violent. The transmission will lose hydraulic pressure causing the transmission to drift in and out of gear. The 4L80E on the other hand features 2. Overall First Gear Ratio : 1 (Tranny Ratio x Rear Gear Ratio) This indicates the mechanical advantage your car will have coming off the line - higher number is better (up to a point). 700R4/4L60E's have a low 3. Yes, I'm working on the second gear launch becasue it is cheaper than a 4L80e conversion. © 2023 By Anna & Ryan. Have Peace Of Mind, knowing that your new 4L80E Transmission has all the Updates developed by General Motors Engineers combined with the Latest Industry Advancements providing Unparalleled OE Strength and Durability. This page provides information on how the 4L80E automatic transmission from General Motors operates with the MegaShift™ controller, as well as the TunerStudioMS settings needed to configure the controller. In most cases, though. Ive seen tranny shops around here that sell 4L80e's rebuilt for cheap, like 6-800 range. The other 4 will showcase some of the best local, Pennsylvania brewed, beers and craft ciders. Standard gear ratio is the OEM 2. The engine is usually under a pretty heavy load at the time, so. 09's was useless. Look on craigslist if it needs to be replaced. I understand out of the whole I shouldn't expect exciting launches, but will it hurt anything? Currently have a stock TH400 in a 3600lbs Nova that is a street car. "Gone to Launch - back in 10 seconds!" Your reaction time can make all the difference in a quarter mile race. Bandi Namco Entertainment Europe, worldwide family entertainment publisher Outright Games, and UK based development studio Funsolve, in collaboration with Sony Pictures, have announced that Jumanji: The Video Game is now available on Playstation® 4, Nintendo Switch, Xbox One and PC Digital for $39. We stock a full line of professional grade components at competitive pricing and ship world wide on most products. But, as for now, I'm saving up for a T56-6 speed transmission. Includes:. setting off in 2nd gear. how does the gear sensor work? here is a video of the one i was making with built in launch and shift light, pretty cool 2nd gear = 2. Ashland, MS – TCI Automotive® now offers a billet transbrake valve body for high-horsepower racers who launch their TH400 in second gear. 06 first gear which is good for initial take off but this makes the transmission have the widest ratio …. I thought you were after the 1st gear ratio of the 4L80E. It is pretty easy to diagnose. Problem shifting 2nd to 3rd gear on automatic transmission, shift solenoid (2000 Chevrolet Silverado 1500) Have check engine, the computer says it needs the shift solenoid, the problem is it will not shift from 2nd to 3rd gear on an automatic transmission. It will always be harder on the clutch since you're slipping it more in 2nd than 1st. It has no first gear. Sonnax Transmission parts for GM 4L80-E applications. It could be used to improve 0-60 times by allowing a higher 2nd gear limit to just hit 60 mph / 100 km/h in 2nd, whilst preserving the lower rev limit in other gears. I did a lot research, if I swap the Front Carrier, Front Ring Gear, Sun Gear from A999 to 904 I will have lower Gear Ratio on both 1st and 2nd Gear, the ratio will be 2. I can kind of feather the throttle to help smooth the shifts. info1 Shifts: Complaints/Corrections 3rd gear start and bind in “1" clutch pack is the problem. the brackets reduce weight transfer, add anti squat and lower instant center and put more leverage on the rear axle tubes. Problem shifting 2nd to 3rd gear on automatic transmission, shift solenoid (2000 Chevrolet Silverado 1500) Have check engine, the computer says it needs the shift solenoid, the problem is it will not shift from 2nd to 3rd gear on an automatic transmission. Most TH400’s with engine braking rely on the OEM design 1″ wide band. It won't shift out of second gear. General Motors 4L60E Transmission shift quality upgrades There's a ton of 4l60E shift kits on the market out there and all kinds of different results and costs. 56 to 1 second gear, 1 to 1 third gear and. doc 2005trans6_4L80E. Release oil for the rear servo in THM 400 and it's four speed successor, the 4L80E, also happens to be apply oil for the second clutch. The real question should be, should you ever start in 2nd? The clutch pedal can vary the torque transmitted from the engine to transmission anywhere from 0 to so. This outer sprag race is taller allowing you to install more second gear clutches. It probably goes without saying, but if you put the vehicle into second gear manually, you'll still be able to get to where you need to go. It has an OD as the 4l80 has. Black Edition 4L80E… 2000HP. Frank Biolsi. I need to reach out to you guys to see if anyone else has ever experienced a pressure drop between the 1-2 shift on their 4L80e and found a solution. The transmission shifts fine when I launch at the drag strip from 1st gear in Sport Mode, however when I launch from M2 the transmission flares badly and hits the rev limiter before it shifts. doc 2005trans6_4L80E. Came in handy yesturday when it was icey!! To launch the Saab hard requries 2nd gear as 1st is too short. Introduced alongside the original 4L60 in the early 90’s the 4L80E was designed for large trucks and is designed as a heavy duty unit, rather than a transmission for smaller cars or even some pickups. I've been building automatic transmissions for 30+ years, and he brought it to me to rebuild the 4l80E transmission in it for him, and I just got it done, and was test driving it, and noticed another issue with it, and I would like to have some input on what exactly needs fixed to. I have a 6L80E in a 2011 Camaro SS that has been modded, and tuned with EFILive. 2nd gear not as smooth as the others??? Hi, Newbie here I have 1,700 miles on my car so far and I've always noticed that going from 1st to 2nd gear is not a smooth transition as the. Forward clutch hub. 5 way TRD LSD(3. It has the 6. It won't shift out of second gear. Transmission bangs into second gear and a loud clunking sound is heard,took vehicle back to dealers 3 times and was told that this is normal condition for the vehicle and no repairs are to be made also that the noise is worse on the four wheel drive models. This issue may be caused by a couple of different things. 56 to 1 second gear, 1 to 1 third gear and. Revo TCU Software offers improved response and optimised shift points but maintains the characteristics of Drive and Sports mode. 4L60E goes into neutral when shifting into third gear. 4L80E Wont shift into second gear unless you let off the throttle. 7 liter gas engine or the 6. 00:1 in both transmissions. set first gear to 1500. That was my choice back when I had an 88 ext cab, after going thru 2 or 3 th400' in 100K miles of towing. This is a discussion on A4 4l60e Trans won't shift out of 1st gear within the Automatic Transmission forums, part of the Drivetrain category; I was hearing some grinding at low speeds in 1st gearthought it was just my brakes rubbing due to the. 48 in second, with a 440 lb. A 4L65E will have the same low gear as a 4l60E. GMH GM Holden Commodore Omega 4L60E 4L65E Auto Trans Transmission Gearbox stuck in Limp Mode Limp Home Mode ( 3rd Gear Only ) & Manual 2nd Only - DIY How To Tutorial See our other 4L60e 700r4. I put on several hundred miles, no change. 4l80e is a good tranny. The 4L80E in my camaro seems to work pretty well now - with the exception of it starts off in second gear when the lever is any position other than 1. If the TCM detects an incorrect 2nd gear ratio, indicating excessive slip or drag within the transmission, then DTC P0732. With the L33 you'll be able to smoke thru 2nd gear so I doubt you'll feel the gear change. These instructions assume that you have full access to the transmission when the Shifter installation is begun, with the transmission removed from the vehicle, or the vehicle body removed from the chassis. - Answered by a verified GM Mechanic. LAUNCH Automobile rvþintenance Intonnaton P0732 GEAR 2 INCORRECT RATIO COMPONENT LOCATION o 2ND BRAKE GENERAL DESCRIPTION The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 2nd gear ratio while the transaxle is. Would there be anything wrong with launching a stock 4l80e in second gear?. Sonnax Transmission parts for GM 4L80-E applications. 0 sec AND Commanded Gear = 4/ with TCC Locked. Doesn't the 2-4 band cover 2nd and 4th gear? Yes, it does but the 2-4 servo uses 2 apply passages. These will have a 2. The trans is a rebuilt and I just put it in. the 2-4 band applies 2nd and 4th gear so the band isnt the problem if he has 4th and since its shifting to 3rd gear tells me the valve in the valve body is working correctly. the brackets reduce weight transfer, add anti squat and lower instant center and put more leverage on the rear axle tubes. Repaired on March 2, 2004 as per bulletin 1430080. Use this gear ratio calculator to select the best ring & pinion and gear ratio combinations to serve your needs. That was my choice back when I had an 88 ext cab, after going thru 2 or 3 th400' in 100K miles of towing. 73's now it would be like you had 3. I did some research online and determined that my rear output VSS took a crap. Now gearshifts 3-4 and 4-3 are VERY evident. Those of you who launch in 2nd gear, what is the trick. Hughes offers 4 versions of this kit, one with 1. 2 days ago · This year I decided to ditch my humble, Stig of the Dump look and equip myself with some decent track gear. The 4L80E (and TH400 or 350), doesn't use any clutches/bands in normal first gear operation, the low roller clutch holds. Was ahead until around 2nd gear then he was alongside and the 2nd set of lights stopped our immature shenanigans! "I could launch in high gear rather than low gear, to even things out", I said. 2nd gear oil is still applied, and so is Drive oil fed to the forward clutches. I installed a used 4l80e from a 1996 hummer. I did a lot research, if I swap the Front Carrier, Front Ring Gear, Sun Gear from A999 to 904 I will have lower Gear Ratio on both 1st and 2nd Gear, the ratio will be 2. 73's now it would be like you had 3. I understand out of the whole I shouldn't expect exciting launches, but will it hurt anything? Currently have a stock TH400 in a 3600lbs Nova that is a street car. Buthow did it come about?. Our transbrake option can be built as a full manual unit or as an automatic unit with full automatic shifting capabilities when coupled with one of our electronic controllers. Shop SONNAX Transmission Parts at BowlerTransmissions. I haven't been able to check the fluid, its been 40s/30s here in Chicago. Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. However a lack of 12V supply can happen anywhere from the battery-ignition switch-fuse block- harness- connector- internal harness. 2L kit with 2 GT3240 turbos and 980HP in dyno(1. Simply put, the TCI® 4L80E 6-PinionPlanetary Sets will unleash the performance potential of any GM 4L80E-equipped street or dragracing application. after some hard offroading my 4l80e tranny has decided to stop shifting into second gear. The biggest improvement is now when I hit 2nd gear it hooks great and the tires get air time, where as before they spun and the front bounced a little. The Gm 4l80E transmission is found in Chevrolet and GMC pick ups, G vans and commercial chassis with GVW of 8600 or greater from 1991 and up thru 2006, Isuzu NPR and NQR trucks as well as GMC/Chevrolet W3500 and W4500 trucks with either the 5. Pictured below are just a few of the Updates & Upgrades that go into each 4L80E Transmission. Buthow did it come about?. The 4L80E on the other hand features 2. This is our strongest transmission offering to date. April 02, 2008. Forward clutch hub. The pump was bad. • A Marmon/Berkshire Hathaway Company SC-4L80E-IN_G 02-13-19. 4L80E will have lightning fast shifts and, with torque. 3) Before thinking that you need an overdrive transmission, think about changing the rear-end ratio! As an example, you could have a TH400 built with a lower first and second gear to get a better launch, and yet the final transmission ratio is still 1 to 1. By using the two speed design, the transmission can utilize the transbrake in second gear, allowing the car to launch a much higher starting line ratio than a powerglide. This table can also be used to derive interrelationships bet-ween components e. usually with a speed sensor problem it will go into "safe mode" which is only first gear. This comes at the expense of a shallower first gear, however, which hurts low end acceleration. Bad Sprag 4L60 E Sprag. When i got home, I unhooked the battery to try and reset the computer. The Japanese company ALE (Astro Live Experiences) aims to create an artificial meteor shower with its new small satellite ALE-2. Many parts interchange between the 400 turbo and 4L80E. Condition/Concern:. Soif you truely lost 3rd gear, I am betting it is a shifter adjustment issue. speed as you go through the gears. A 4L65E will have the same low gear as a 4l60E. Some times it will skip 2nd and go into 3rd, when it spins bad enough. Second gear will have more torque than second gear with a lower rear end numerical ratio, but you will not be able to stay in second as long when the rear end gear ratio is increased. Broken or detached shifting linkage will cause the problem. How many people launch in second gear vs. Why is your M1151 4L80E transmission stuck in second gear? My 1990 thunderbird is stuck in second gear. I can kind of feather the throttle to help smooth the shifts. 73's now it would be like you had 3. GMH GM Holden Commodore Omega 4L60E 4L65E Auto Trans Transmission Gearbox stuck in Limp Mode Limp Home Mode ( 3rd Gear Only ) & Manual 2nd Only - DIY How To Tutorial See our other 4L60e 700r4. Also, my speedometer doesn't work anymore. I have attempted launching twice in M mode using second gear but on both occasions, the transmission automatically changed into 3rd around 3,500 rpm and ruined the run. 0l which is 4l80e equiped, I did a trans segment swap. 6 SPEED POWER FLOW DIAGRAMS Click on Diagrams Below for PDF Diagram Download. thm 200-4r - new filter Some 1981-87 vehicles equipped with THM 200-4R transmissions' may exhibit a gear noise (whine) prior to the 1-2 shift and possibly during 2nd gear. Oregon Performance Transmission is the best place on the web to buy transmission parts! We not only carry a wide range of performance minded transmission parts for your car, but we also provide the best customer service; before and after the sale. I have no transmission codes, and the dealer says that it is internal problems. I bought a transmission Manuel on the 4l80e. 4L80E 2nd Printing Before & After Service Complaints. Put it in third, it still goes from first to second to third, and no. 4L80E Intermediate Outer Sprag Race (REMAN) Want more strength and performance for your Turbo 400 or 4L80E? Get ATF's 4L80E intermediate (2nd gear) outer sprag race. Each shift event in the 4L80e transmission is a clutch-engagement, rather than a band engagement or combination of the two as in the 4L60e. If the trans locks down like the brake is on in manual fist then either the band or 3-4 clutch is always on, Now the voltage fluctuations could be the underlying cause if theres been a transgo hd2 installed at some time and theres not enough voltage to turn on the 1-2 (A) shift solenoid the you could end up with the band applied due to this (2nd gear start) and in manual low the low/reverse. TOLL FREE 1-877-469-7440 • [email protected] One of the most critical elements of any GM street/strip or towing application is acceleration. So my 79 SC has some of the common shifting quirks of the 915 that I've heard others talking about. But, as for now, I'm saving up for a T56-6 speed transmission. Pictured below are just a few of the Updates & Upgrades that go into each 4L80E Transmission. I just got my lq4/4l80e Geo Tracker swap on the road. A broken shifting for in the transmission can also cause the problem. Choosing a maximum 1st gear to 2nd gear upshift rpm. With that in mind, drivetrain engineers at TCI® recently designed two new 6-pinion planetarysets for 4L80E transmissions that provide powerful launches and improved gear transitions. Crawl Ratio Calculation Basics. The 4L80E is the descendant of the "Ole Reliable" TH400 transmission. The gear selector is moving on the side of the transmission. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Ok here is the issues. GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. This sub-feature of Launch Control allows users to easily and safely warm up tires at the track. 4 rear gear and your drive would be back to 3. I have been told the gear options on the 4L80E are not great for offroad and you have to run more gear in the rear but they are doable. Use a stock bushing with red loctite and staked in place. Transmission Gear Ratio Chart ~ Gear Ratios are listed for many popular transmissions. My launch approach, remember this is a stick, was to come out of the hole at 2500 rpm. I assume it has something to do with a torque setting that is causing this to occur. P-R-N-D work, upshifts are erratic and occur at random engine speeds, will not upshift from first gear (no upshifts at all): This problem seems very serious in nature but in fact this is something very simple to fix. 700R4/4L60E's have a low 3. The TCM compares the known transmission gear ratio to a calculated ratio for each commanded gear. Proprietary design features instant brake apply and release and the fastest 2-3 upshift ever available with the OEM casting. We specialize in sale priced Transmissions, Transfer Cases, Engines and more. Yes 0 mph its just the computer is sllllooooowwwww. wav V8 slow down 2nd. Simply put, the TCI® 4L80E 6-PinionPlanetary Sets will unleash the performance potential of any GM 4L80E-equipped street or dragracing application. Lower first and 2nd gear, ie 3. We also offer a transbrake valve body option on all of our 4L80E transmissions. It won't shift out of second gear. There was one other occasion when the trans did what you said. It is only used for the ECM to calculate transmission slip. So when in 3rd gear on a TH400 or 4L80E, you have 3 gears "turned on" or applied. When there is a shift from second to third gear, 3-4 clutch engagement. The trans is a rebuilt and I just put it in. 57 2nd gear ratios, these kits can release the trueperformance potential. Would lanching in 2nd gear at the track cause any damage the tranny? 1st gear with the 3. Revo TCU Software offers improved response and optimised shift points but maintains the characteristics of Drive and Sports mode. Crawl Ratio Calculation Basics. The 4L80E can handle overdrive towing all day long, the 4L60E is weaker so towing anything over 4000lbs with a 4L60E should be done in 3rd. 1st ~10psi for a good launch 2nd ~14-17psi 3rd-5th 21psi. I've damaged two transmissions usually 2nd & 3rd gear. Normal stop and go like a stop sign. When there is a shift from second to third gear, 3-4 clutch engagement. GM THM 4L80E ATSG Techtran MANUAL Repair Rebuild Book Transmission Guide 4L80-E This kit includes everything pictured:One (1) A Shift Solenoid. 75") Sonnax spring. The transmission shifts fine when I launch at the drag strip from 1st gear in Sport Mode, however when I launch from M2 the transmission flares badly and hits the rev limiter before it shifts. Most TH400’s with engine braking rely on the OEM design 1″ wide band. Use a stock bushing with red loctite and staked in place. wav V8 slow down 2nd. This is a discussion on A4 4l60e Trans won't shift out of 1st gear within the Automatic Transmission forums, part of the Drivetrain category; I was hearing some grinding at low speeds in 1st gearthought it was just my brakes rubbing due to the. The following is a list of problems and possible solutions, should your 4L80E suddenly start to give you trouble. The GM 4L60E/65E/70E-4L80E/85E Diagnostic Code Book is designed to provide the technician with a step by step diagnostic approach to each and every transmission code available from 1991 to the 2007 model year. I've been building automatic transmissions for 30+ years, and he brought it to me to rebuild the 4l80E transmission in it for him, and I just got it done, and was test driving it, and noticed another issue with it, and I would like to have some input on what exactly needs fixed to. According to service information, The vehicle will launch in 2nd gear and shift normally through the gears without allowing torque converter lockup. 5 - 2 seconds to get the car moving off the line. The reason I ask is because I am in the process of re-doing my cockpit layout, and the transbrake switch is getting moved. You will have to have it programmed by a tuner for the 5. The rest of them you have to check by taking off valve body or tearing down tranny. I would guess the demon is the same.