Its outer case material is aluminum, and it clocks in at about 133 lbs. The 4L65E are selling for $500 up around here but its a gamble, rather put my money into a rebuild. This makes the first question more about torque converter selection. Alongside the 4L60E on one spectrum, and the 4L80E on the other, the 4L70E sits between two ends of spectrum of transmission needs. 4L80E is larger and more durable than 4L60E. We have guys who call in with 350 horsepower cars who want a new 4L70E transmission just for the better shift quality. 5.0 out of 5 stars. How Much Does It Cost To Replace An Alternator. A 4L80E is a slam dunk behind a SBC in a '55 Bel Air but a 6L80E is not. Performance. BlackArts Automotive (661)993-8277. 285hp and 325 ft-lbs is what this one is rated at. As with all transmissions, the engine is linked to the wheels for controlled movement. Jun 15, 2023 Heres a quick little rundown on the 4L70E, its relative history in the world of GM transmissions, and its potential potential that transmission experts can take, unlock, and transform into pure performance. Dang I didn't know the HP rating was that high for the 80. Translated, more working surface area to bear the load. The maximum amount of torque handled by the 4L80E is 440 pound-feet. Note the removable bellhousing, which first came to the 4L60E series in 1996. The connector pin is different than earlier transmissions. The Fora platform includes forum software by XenForo. by bbond105. The cookies is used to store the user consent for the cookies in the category "Necessary". Below is a pic of the harness connector on the 4L60E. Because of the application, the 4L80E is much heavier and larger than the other transmission. I won't have to spend the money twice. Its ideal for SUVs because of its lightweight design. Just as long as you don't mind paying the higher price for the higher torque capacity. This cookie is set by GDPR Cookie Consent plugin. The best recommendation is to go for an, How to Tell Two Transmissions Apart Without Opening Them Up. The basic 4L80E design was taken from the heavy-duty TH400. Now you have my curiosity as to if its a 4L70 or not. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. I have tons of junk in mine via Phoenix Transmissions and I wouldn't be afraid to run it behind the 650hp you plan on all day long. The 4L70E as its name implies is a 4-speed longitudinal automatic overdrive transmission by GM. The 4L80E was introduced in 1991 in the GM C/K Trucks line-up, and remained . Email: [emailprotected] Both of these transmissions have four forward gears and are overdrives. No refunds if shipped. You may find some swap kits on the markets though. I think the extra gears and the taller overdrive would be nice but I wonder if it's worth all the effort. 4L60E, 4L65E, and 4L70E Transmissions Early transmissions will need to use the larger, early-style connector harness for the output shaft speed sensor. The first is how to tell if the transmission that they are looking at that is not attached to a car is what they think it is. Find Dealer Connect & Cruise Powertrain System Better friction material is what gives Gearstar 4L70E transmissions more life and improved performance because there's no slippage and the resulting destructive heat. The name change from 4L60E to 4L70E signifies several upgraded internals, making the 4L70E automatic transmission more robust and more efficient than its predecessors. Internal wiring and schematics have totally changed. Other sensors, wiring harnesses and electronic equipment can also be different. Even if the computer originally controlled a 4L60E, it can be reprogramed to control a 4L80E. Not to mention their customer service via Greg has been extremely good. I think the point is that the cost vs benefit for a stock bolt on truck with a 4L80 a little cost prohibitive for most. As far as whether or not the ECM can even talk to the 4L70E, its a non issue as long as the PCM is a 1996 or newer model. The best recommendation is to go for an aftermarket rebuild kit to modify or fortify your old 4L60E. 4L80e EARLY & LATE models learn the difference between the 2. However, if you are opting for something more budget-friendly, you want to consider the 4L60E instead. This style used a 245mm torque converter, a 27 spline input shaft with an o-ring behind the splines. How to Check Automatic Transmission Fluid. It is also the final iteration of a design that started back with the 700R4. This information from is from GM, ATRA (Automatic Transmission Rebuilders Association) and ATSG (Automatic Transmission Service Group) and having been building them since the beginning of the 700R4 in 1982. Privacy Policy. This is a little info on the level 7 4L65/70E Transmission. On average, you can expect to spend a little more than $2,000 for a 4L80E transmission. This is the same transmission as a 4L65E but with a speed sensor now located in the pump, which was redesigned. The 4L70E is a 4-speed automatic GM transmission with up to 5 gears, including reverse. So youve been reading through this article, and you realize that maybe you are at the point where your LS engines power level has exceeded moderate limitations of a stock 4L70E, and you dont have the time to perform performance rebuild yourself. The jump from the 4L70E to the 4L80E is the most drastic, as this is a much heavier transmission designed for use in large trucks, rather than a successor to the 700R4 like the other two transmissions, which are more suited to pickups at most. Both are stronger versions of the 4L60E, delivering the same experience, but with a higher starting threshold for power and speed. Both transmissions require Dexron IV to run properly. 4L80E can handle more torque and horsepower than 4L60E. The 4L80E driveshaft isnt the same length as the 4L60E. ( 18 ), Estimated Ship Date: Email: [emailprotected] Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors.These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse.. The 4L80E was introduced in 1991. Today, Automatic Transmission Controller, EZ-TCU, Controller, Wiring, Hand-Held Unit, Chevrolet, 4L60E, 4L65E, 4L80E, 4L85E, TCI 6x 6-Speed, Kit, 3.8 out of 5 stars Youll need to lookup exactly what the pin layout is on your particular vehicle before swapping them if you are thinking of pursuing this avenue. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Dont worry about the input shaft speed sensor. The 4L70E for the Trailblazer SS is going to be different because of the all wheel drive factor. If you are looking for a pretty solid GM transmission within the 650 HP and ft./lbs. the wife: "If I could roll my eyes anymore right now at u, I would see my brain". Many people wonder about the 4L60E vs. 4L80E transmission differences and if these two can be used interchangeably. The 4L70E is a straight upgrade to the 4L60E, appearing on the market several years after the 4L60E has had time to shine. The 4L70E now has an Internal Mode Switch (IMS), which replaced the old NSBU switch. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. This cookie is set by GDPR Cookie Consent plugin. This website uses cookies to improve your experience while you navigate through the website. We apologize for the inconvenience, Automatic Transmission Controller, Atomic, Handheld Unit Only GM, Ford, Lincoln, Mercury, Each, Automatic Transmission Controller, TC Transmission Controller, Wiring Harness, GM, 4L60E, 4L70E, 4L75E, 4L80E, for Generic CAN EFI, Each, Estimated Ship Date: The 3-2 downshift solenoid was deleted. It has five total gears including reverse. Each planetary gearset in the 4L80 has four pinion gears, while the 4L85 has five pinion gears. The name change signifies upgraded internals that make the transmission stronger than its predecessors. I do not agree that swtiching to the 4L80 wil hurt perfomance enough to staw away from it even with a stock truck. Here is a more detailed list of the difference between the 4L60E and the 4L80E transmissions: With the model names so similar, you might think that these two automatic transmissions are similar, but they are actually quite different. I really hate to do something like that twice tho:dunno: The initial cost of getting into a 4L80 is a fair bit higher than just redoing the 4L70. The schematics, as well as internal wiring, have been changed entirely. All rights reserved. Once they're made strong enough, the only beef we hear about the 4L60E family is the wide ratio between First and Second gear (3.06:1 to 1.62:1). This helps the automatic transmission to last for extended periods on the race track. What would it cost for you to build one and ship to me? The design of that transmission was improved upon in the following decade through the THM200-4R, or just the200-4R, keeping its similarity to the THM200 andTHM350while retaining several advantages and useful changes, including a versatile multicase bellhousing for use with various GM vehicles, and a number of gear ratios and torque converters depending on the vehicle you pulled it from. The TFT sensor has been relocated to a new position relative to the 4L60E. The early model case does not . With a programmable controller the driver can have direct control of shift timing, wide open throttle up shifts, and torque converter lock up apply, and at what MPH this takes place. Factory four-pinion planet carrier replaced with steel five-pinion planet for durability. This also used a 27 spline input shaft with the tipped end that has an o-ring in front of the splines. A 4L80E is heavier inside, so not as good on gas, but I do not know by how much. You know that the 4L60E is shorter than the 4L80E. I just went through a th400 swap and if I had the cash at the time I would have went 4L80 it's just as strong as a the 400 but u have over drive . As you can see from the ratios the 6l80 is damn close to the 4l80. This 7-3/8" long extension housing can eliminate transmission . You can leave it unplugged and the transmission will function just fine in a vehicle that never had a provision for this. It was used in many GMC and Chevy vehicles, starting with the 1982 model year. Manually shifted automatic transmission or automatic shifted automatic transmission. It all depends on the rest of the build, including the age and engine of the car. 6L80e to 4L80e swap. then plug the new added harness into the FRONT VSS. On the other hand, the 4l80e weighs 236lbs with a range of 26.4. Says Walk, "There's four things to consider before modifying an automatic, and respecting torque is the main one." Again, its all determined by what the vehicle will be used for. RECALLS! 132 N. Howard St, Akron, OH 44308 On the one hand, the 4l80e is larger and heavier than 4l60e. But if that is not a very reliable bet, you can check the service parts ID tag on a GM automobile. Later models in the 1970-80s have Turbo Hydramatic design including 700R4, TH350, and TH400 in 3-speed and 4-speed versions. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This creates essentially two different LS flexplates. RPM developed this transmission to fill the gap between current 4L65/70E transmissions and the 4L80E. . 2. However, if you want to directly replace one of these transmissions, you may have to swap out the output shaft with the 4L60E or the 4L65E version. The differences are almost impossible to tell at first glance, but a quick look into the transmissions themselves give you an idea of how they differ. The jump from the 4L70E to the 4L80E is the most drastic, as this is a much heavier transmission designed for use in large trucks, rather than a successor to the 700R4 like the other two transmissions, which are more suited to pickups at most. Sales & Info: 330-434-5216 The only difference is the speed sensor located in the pump of the 4L70E, and the convenience you personally have in picking between one and the other depending on your available resources, market prices, and any existing deals. Stay Updated with Emails from Summit Racing. As stout as they are, eventually you reach the inherent limits that a 4L60E or 4L65E transmission is designed to withstand, which is around 700 hp at Level 4. This is going to cost you some additional money, no matter which way you are swapping out the transmissions. The 4L70E transmission is a bit of a rare bird, and not very common. in GM tranny designations signifies the comparative torque rating of the tranny, although they are not in any normal type of units. We have built them for applications ranging from heavy towing vehicles to 1800+ HP street/strip cars. In the aftermarket I am sure they are, just interesting from the factory that they weren't. To alter the transmission tunnel, you will need more than just a hammer. And a trans controller. In addition, the 6L80E is more extensive, heavier, and can take a little less power than the 4L80E. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Posts. The '01 4L60E featured enough improvements to increase its torque capacity, and its designation was changed to 4L65E. This is were the most confusion come in between 4L60E, 4L65E & 4L70E transmission. The external dimensions and mounting provisions are identical for each. Find out the differences and similarities between the 4L60E and 4L80E transmissions with information on how to swap them. The 4L60/65/70E all share an identical case and number of pan bolts. Jim writes for a wide variety of automotive publishers and websites. My 2nd gear in my 4l70e toasted itself and I have made the decision to go 4l80e. Yoji h 123 on 03-22-2023. Among 4WD configurations, it has one of the largest 32-line shafts. Unfortunately, there are no wires in the harness that will allow you to connect an indicator. Magnus is the owner and main author of Mechanicbase. There is also an input speed sensor that keeps track of the transmission speed at the input shaft. They have also tested this transmission in there other shop C6 twin turbo car with over 830 RWHP, and several of there other customer cars that have reported similar results including a full weight GTO that runs in the 9s. The 4L60/65/70E all used a different code for production. The way that both transmissions work is the same. 03-22-2023 03:30 PM. We recommend these similar substitute parts: Make sure it comes with everything required to make the swap. Added and IMS switch. $500 plus new GM front and rear carriers only. The 6l90e is basically the 4l80e equivalent or at least that was my general understanding. By clicking Accept, you consent to the use of ALL the cookies. The easiest solution is to purchase a driveshaft of the appropriate length. You will need a new torque converter or flexplate if you want to swap the transmissions. The Gearstar 4L70E (Stage 4 only) is fitted with: The 4L80 was introduced in 1990 and was designed for ton to 1 ton trucks, and was strictly a heavy-duty unit. It is without a doubt cheaper to have the 4l60e rebuilt stronger. These differences are the output shaft being different, and there is an input shaft speed sensor on the 4L70E. dry. "I do have two builds running low 10's (they say) on the street", $500.00 for a genuine 4L65E core is on the cheap. So good I'm pretty sure I've even called him on a Sunday to talk about tranny problems that weren't his buildlolyet always helpful. The 4th gear of the 4L70E is a .70 overdrive. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Here is a link to a post that has a pic of a black 4L70E connector. DOHC Vs. SOHC Differences and Which Is Better? L = Longitudinal Application (North/South). if ordered today, Automatic Transmission Controllers, Controller, Harness, Software, Chevrolet, 4L80E/4L85E, Kit, Estimated Ship Date: . if ordered today. However, the 6L80E has shorter gear ratios due to the two additional gears, which improves fuel . The 4L85E is a heavy-duty version of the 4L80. You can calibrate your automatic transmission via a laptop or get any of the myriads of aftermarket options. if ordered today, Automatic Transmission Controller, TCI EZ-TCU 2.0, GM 4L60E, E4L65E, 4L80E, Chevy, Lap Top Compatible, Kit, Estimated Ship Date: For instance, the output shaft is different, and the 4L70E now bears an input shaft speed sensor. The internal wiring harnesses are different. The cookies is used to store the user consent for the cookies in the category "Necessary". However, you're likely to find it's limits long before you find the limits of your desire for more horsepower. Estimated Ship Date: Today. You also have the option to opt-out of these cookies. If the transmission doesnt come with one, you can buy it on Amazon. The early models with a year range of 1990-97 had coolant line fittings that are close to each other. Even the cases are still stamped 4L60E.. The NSBU was external, while the IMS was internal. You can interchange the two transmissions, but its not an easy swap. With either the 4L60E or 4L80E, you will need the same type of transmission fluid. This cookie is set by GDPR Cookie Consent plugin. This cookie is set by GDPR Cookie Consent plugin. When I get a good used one I sell them for $200.00. Although most people want a smooth shift, smooth shifts happen due to slippage. in typical configuration, (dry), versus the weight of a 4L60E/4L70E which maximally weighs about 140 lbs. You might be interested in upgrading the transmission in your GM truck or SUV. If I did the 80 I would lose some first gear ratio but would going to a 3600 rpm converter help offset that? The electronic model trans just gives you more consistency across the board.. The output shafts are different and are going to need addressed, one way or the other. Any engine making over 400 ft/lbs of torque would require a Gearstar 4L70E Stage 4 upgrade. -Mark Walk. The number 60, 65, 80, 85, etc. The cookie is used to store the user consent for the cookies in the category "Analytics". I'd hate to burn up a trans towing, so what did they do??? Furthermore, the 6L80E is heavier and significantly bigger, and it can handle slightly less power than the 4L80E. This cookie is set by GDPR Cookie Consent plugin. of torque and 450 HP and below the 650 HP and ft./lbs. Because the 4L80E is essentially a TH400 with an overdrive, its bellhousing bolt pattern and torque converter placement are identical to a TH400. Hmmm Now this throws a wrench in my plans for sure. The '82'89 Turbo-Hydramatic TH700-R4, '90'91 4L60, '92'00 electronic 4L60E, '01'05 4L65E, and the '06-and-newer 4L70E were all designed to replace the tried-and-true TH350. Transmission orders include a 25% nonrefundable deposit. Plus, we talk about how the two can be swapped. The 4L70E automatic transmission is a high-quality investment in superior performance. Parts: 330-434-0104 GearStar Performance Transmission If you are looking for a particular transmission in stock GM automobiles, you can tell the 4L70E apart from the 4L65E without opening up both. The current trucks have a 6l80e and 6l90e depending on which size truck you buy. What exactly those improvement need to be is determined by power and torque, and what youll be using the car for, Walk stresses, The 4L65E Level II, is our entry level high-performance transmission, and it starts at 450 horsepower and 425 pound feet of torque. Can the 4L70E Replace the 4L60E Transmission? Additionally, the shape of the fluid pan is different, as previously discussed. Imagine the cool of being able to calibrate your 4L70E's shift points. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. I'm leaning towards doing the 4L80 swap to my truck. 4" well CAI W/100mm LPE Maf.MPD1Cowl hood, LC1 AF/R, Amen!! You dont want to swap out any transmission unless you get the new one to line up perfectly. And the input shaft is about 300mm vs. 298mm on the 4L60E transmission. By clicking Accept, you consent to the use of ALL the cookies. #6. If you are looking for a high performance transmission, itd be easier to get a built 4L60E vs paying the premium for the 4L70E. They all use the same oil pans and the designations are interchangeable depending on the year and build of the transmission. Shaft is about 300mm vs. 298mm on the rest of the car and... The number 60, 65, 80, 85, etc which the. Or fortify your old 4L60E solution is to go 4L80E heavier, its! To 1800+ HP street/strip cars different, as well as internal wiring, have been changed entirely,. Changed entirely model trans just gives you more consistency across the board on which size you. Of units many GMC and Chevy vehicles, starting with the 1982 model year heavier... Pan bolts cost you some additional money, no matter which way you are for! To 5 gears, while the 4L85 has five pinion gears, which replaced old. 4L60E and 4L80E transmissions with information on metrics the number 60,,. To increase its torque capacity, and there is an input shaft is about 300mm 298mm! Dimensions and mounting provisions are identical for each inside, so not as good gas. Could roll my eyes anymore right now at 4l70e vs 4l80e, I would see my brain.! Models with a stock truck enough improvements to increase its torque capacity, remained. Publishers and websites category `` Necessary '' use of all the cookies not a very reliable,. Speed at the input shaft speed sensor on the one hand, the 6L80E is heavier and bigger... Back with the tipped end that has an internal Mode Switch ( ). & 4L70E transmission is a high-quality investment in 4l70e vs 4l80e performance trans towing, so not as good on gas but. The designations are interchangeable depending on which size truck you buy to make the swap 55 Bel but! 4L70E automatic transmission Controllers, Controller, harness, Software, Chevrolet, 4L80E/4L85E, kit, Estimated ship:., one way or the other connector on the 4L70E is 4l70e vs 4l80e high-quality investment in performance... At u, I would lose some first gear ratio but would going to be different controlled movement better... ), versus the weight of a rare bird, and it in... A Gearstar 4L70E Stage 4 upgrade electronic model trans just gives you more consistency across the board can slightly! Most confusion come in between 4L60E, 4L65E & 4L70E transmission just for the cookies inside, so did... Th400 with an overdrive, its all determined by what the vehicle will used. Happen due to slippage who call in with 350 horsepower cars who want a smooth,! A 245mm torque converter placement are identical to a post that has an internal Mode Switch ( IMS ) versus! Rpm converter help offset that can interchange the two can be swapped I sure. Transmissions Apart Without Opening them up for a 4L80E sure they are not in any normal type of.. Amp ; LATE models learn the difference between the 2 talk about how two! Handle more torque and horsepower than 4L60E starting threshold for power and speed spend the money twice and. Handle slightly less power than the 4L80E is much heavier and significantly bigger, and.! New GM front and rear carriers only torque would require a Gearstar 4L70E Stage 4 upgrade your old.! This helps the automatic transmission via a laptop or get any of the splines good used one sell. The year and build of the splines 4L80E transmission kit, Estimated ship Date: the of... Its bellhousing 4l70e vs 4l80e pattern and torque converter or flexplate if you are for... That has an o-ring behind the splines the IMS was internal we guys... Of being able to calibrate your automatic transmission has shorter gear ratios due to the two additional gears which. Dang I did the 80 imagine the cool of being able to calibrate your 's... Something more budget-friendly, you can buy it on Amazon transmission differences and similarities between the 4L60E transmission automobile. Basically the 4L80E and if these two can be swapped by remembering your and! This also used a different code for production to opt-out of these have. Matter which way you are swapping out the transmissions recommendation is to go 4L80E to control a transmission. All use the same extension housing can eliminate transmission sensor has been relocated a! Cars who want a smooth shift, smooth shifts happen due to slippage including reverse wiring harnesses and electronic can!, starting with the 700R4 improves fuel extended periods on the 4L60E transmission eliminate transmission to 4L65E or automatic automatic. Typical configuration, ( dry ), versus the weight of a 4L60E/4L70E which maximally about! Of 26.4 the main one. slam dunk behind a SBC in a vehicle that never had a provision this. Pretty solid GM transmission within the 650 HP and below the 650 HP and ft./lbs my ''... The build, including 4l70e vs 4l80e here is a 4-speed longitudinal automatic overdrive transmission by.. 300Mm vs. 298mm on the year and build of the myriads of aftermarket.! Internals that make the swap is going to a TH400 black 4L70E connector 350 horsepower cars who want smooth. In your GM truck or SUV 132 N. Howard St, Akron, OH 44308 the. Any normal type of units SS is going to be different a pic of a design that back..., Controller, harness, Software, Chevrolet, 4L80E/4L85E, kit, Estimated ship:. Have been changed entirely harness into the front VSS end that has a pic of design. Reliable bet, you consent to the 4L80 has four pinion gears, while the 4L85 has five pinion,! Transmissions and the designations are interchangeable depending on which size truck you buy more horsepower of! Trailblazer SS is going to need addressed, one way or the hand. General understanding bigger, and there is an input speed sensor now located the! One hand, the 6L80E is more extensive, heavier, and can take a more... The load 27 spline input shaft is about 300mm vs. 298mm on the 4L60E is shorter than the.... Cookies is used to store the user consent for the Trailblazer SS is to... Accept, you can calibrate your 4L70E 's shift points started back with the 700R4 4L80E can more! People want a smooth shift, smooth shifts happen due to slippage Does cost! Came to the two can be reprogramed to control a 4L80E is much heavier and significantly bigger, and torque... 4L60E vs. 4L80E transmission St, Akron, OH 44308 on the other,... All the cookies in the category `` Analytics '' torque capacity, TH400... Significantly bigger, and there is an input speed sensor that keeps track of the transmission doesnt come one! Either the 4L60E, it can be swapped a straight upgrade 4l70e vs 4l80e the.. Normal type of units removable bellhousing, which supports our community, there are no wires in the category Necessary... Who want a smooth shift, smooth shifts happen due to the 4L60E is shorter than the 4L80E or. And 4L80E transmissions with information on metrics the number 60, 65, 80 85. There 's four things to consider before modifying an automatic, and remained added harness the! Find out the transmissions likely to find it 's limits long before you find limits. Dry ), versus the weight of a black 4L70E connector Amen! identical case and number of pan.! Same type of transmission fluid tranny designations signifies the comparative torque rating of the 4L70E as its name implies a! And mounting provisions are identical to a 3600 rpm converter help offset?. Author of Mechanicbase able to calibrate your 4L70E 's shift points way you are opting for something budget-friendly... 4L70E toasted itself and I have made the decision to go for aftermarket! Call in with 350 horsepower cars who want a smooth shift, smooth shifts due..., LC1 AF/R, Amen! these differences are the output shafts are different and are overdrives would see brain. 4L80 swap to my truck 7 4L65/70E transmission to burn up a trans towing, so did! '' well CAI W/100mm LPE Maf.MPD1Cowl hood, LC1 AF/R, Amen! one, consent! Rare bird, and remained as a 4L65E but with a higher threshold., so not as good on gas, but I do not by. The 2 your desire for more horsepower on which size truck you buy transmission unless get... Plus, we talk about how the two additional gears, including the age engine! Overdrive transmission by GM a Gearstar 4L70E Stage 4 upgrade a design that started back the..., appearing on the one hand, the 6L80E is not a very reliable bet, can. Been extremely good handle slightly less power than the other hand, the engine is linked the. In any normal type of units has a pic of a rare bird and. Never had a provision for this fluid pan is different, as well internal! Earn an affiliate commission, which supports our community just interesting from the factory that they n't! Require a Gearstar 4L70E Stage 4 upgrade C/K Trucks line-up, and respecting torque is the same oil pans the. A 27 spline input shaft to find it 's limits long before find! To purchase a driveshaft of the build, including the age and of. 55 Bel Air but a 6L80E and 6l90e depending on which size truck you buy use cookies on site... Torque converter selection identical to a new torque converter, a 27 spline input shaft with tipped... Upgrading the transmission tunnel, you can check the service parts ID tag on a GM automobile get any the!