Hopefully this isn’t a redundant question, as I searched the thread and couldn’t find anything that jumped out. I will be installing a 6.0 and 4L80E transmission (after I found out the 6L90 requires tunnel mods). I’m most likely going with a Be Cool custom radiator, aux trans cooler,. Also, the 4L80E transmission is typically about 4 inches longer than a TH400 (depending on the length of the extension housing), but the trans mount is located roughly 112 inches rearward. The Big-block Mopar crate engine goes by many names. You may know it as the Read More.

The 4L80E is a computer controlled transmission and the successor to the TH400. Identification of the 4L80E is pretty easy. If you use the process of elimination, there are only a few transmissions that it can be. The transmission itself has been around since 1991, and the case has changed a bit like the 4L60E/700R4 twins.

The 4L80E is essentially a TH400 with an overdrive gear added. The are both legendary for their bulletproof reliability straight from the factory. Their specs are similar, although the 4L80E is a few inches longer, which means you’ll need to get a new driveshaft if you were to swap one for the other. They both have the same forward gear ratios, only the 4L80E gets the overdrive gear of course. That overdrive gear is not as aggressive as the overdrive on the 4L60E. It is a very heavy transmission. In fact, it’s 27 pounds heavier than the 4L60E.


4l80e Transmission For Sale

4L80E Transmission Specs

4l80e Wiring Harness

Manufacturer: General Motors
Production: 1991-2005
Type: 4 Speed Automatic, 6.2 quart capacity (standard models)
Gear Ratios:
  • First- 2.48
  • Second- 1.48
  • Third- 1.00
  • Fourth-0.75:1
  • Reverse- 2.07:1
Input Shaft: 32 spline
Torque Converter Lock: Yes
Overdrive: Yes
Case Length: 32″Different applications had different lengths due to different tail shafts/transfer cases. Use this diagram to help you.
Outer Case Material: Aluminum
Controlled by Computer: Yes
Weight: 187 pounds without the converter

If you were to look at them side by side it would be a no brainer which one is which. The thing is massive. In fact, it is so much larger than a 4L60E, TH350, etc that it will often require a larger tunnel size than your car may allow. That is why it is important to measure your tunnel size if you are going to be doing any sort of swap. If you are looking to swap a 4L80E into a muscle car, this article from Hot Rod is a good read.

4L80E identification- the easy way

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With all GM longitudinal transmissions, it is far and away easiest to identify them by the amount of bolts on the transmission pan. Only the TH350 and TH400 share the same number of bolts. So if you count the bolts and get 17 you can be sure that you have identified the 4L80E transmission. The 6L80E, which is the successor to the 4L80E, has 20 bolts.


If you are looking at a transmission and you don’t even really know where to start, you can look at whether or not it has any sort of computer control to it. At this point you see that it is computer controlled, you’ll find a circular wiring harness connector. You’ve now eliminated all of the classic gm automatic transmissions. That’s going to narrow it down to the 4L60E, the 4L65E (identical to the 4L60E on the outside), the 4L80E itself, and the 6L80E.

Hope this helps.

Here are some articles you may find useful: 2015 nissan altima transmission for sale.

4L60E VS 4L80E Differences -or- 4L80E Transmission Problems


Level 4 4L80/4L80E- Rebuild – Rated to hold up to 1200HP

Convert your 4L60E to a 4L80E!We provide sales and technical support 7 days a week from 8am to 10pm EST. Call us at

4l80e Transmission Rebuild Kit

4l80e torque converter


4l80e Rebuilt Transmissions For Sale

*(Within Continental U.S. to most business addresses or nearest freight terminal)


Rated up to 1200 HP ! Transmission and converter comes with a one year unlimited mile warranty extended warrantys are available! If you are using this transmission for drag racing and have over 650 HP you will need a upgraded converter you my need a anti balloon plate added or possibly billet hub or more disks. Prices on converter vary depending on stall speed and HP call for details.


• All new lip seals
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4l80e Gear Ratios

$400.00 Core Charge.

4l80e Rebuild


This MAD DOG TRANSMISSION is designed for lots of abuse, excellent for RACING or TOWING heavy weight. This transmissions will not take away any horsepower from your engine. As a matter of fact, this transmission will deliver more rear wheel horsepower than the factory 4L80E!! The reason being is that we run roller bearings instead of thrust washers which drag inside the transmission and create more heat. The most common problem on the 4L80E is loosing reverse and 3rd gear due to the aluminum pressure regulator valve binding up and sticking at wide open pressure. We put a steel pressure regulator valve to eliminate that common problem. Another common problem is damaged accumulator bores. We use the updated Sonnax sleeve and piston to eliminate that problem. Over 26 years of building experience is put into each transmission to ensure that the pressure and clearances are to specifications.

If you want to run this transmission without a computer that is not a problem. $400.00 for Full Manual Valve Body external box that will eliminate the on-board computer just run 12 Volts and plug it in the transmission also activates lock up.

NOTE: Let us know what type of shift you want. We can custom build each valve body for your application.

I have been building transmissions for over 26 years. I’m a former NHRA Drag Racer. It’s always best to put top of the line components in the transmission, however if you don’t install them properly and check all your clearances, etc., ANY transmission will fail. We provide excellent technical support to all our customers. We will walk you through the proper installation of your new transmission.

*Additional charge of $180.00 to ship to a residential address or West Coast Shipping.