Is the 6L80 a bad transmission?

The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software …

How reliable is the 6L80 transmission?

The 6L80 is doubtless a very successful OEM transmission, and a terrific conversion transmission in the right Jeeps and situations. However, it is a long transmission and is not compatible with short-wheelbase Jeeps such as the CJ5.

What is difference between 6L80 and 6L80E transmission?

The gearing spread is a very capable 6.04, with ratios in each gear as follows: compared to your stock JK auto transmission you can see a 6L80e has a much better 1st and second gear along with 2 overdrives. The 6L80 has a maximum RPM limit of 6500 RPM.

How much horsepower can a 6L80 transmission handle?

They feature custom nitrided steels to prevent warping, and more durable clutch linings that are more resistant to heat. With these modifications, a 6L80E can handle 500 to 600 rear-wheel horsepower in the typical street/strip application, although we have had customers push them all to the way to 1,000 hp.”

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Does a 6L80 transmission need to be programmed?

This transmission is an electronically controlled unit with an internal TCM (transmission control module) that must be Reprogrammed before operating the vehicle. Failure to do so will destroy the transmission.

How long does a 6L80 transmission last?

A rebuilt 6L80E transmission will only have a certain number of components that get replaced. So the service life is limited, and the warranty will only last 1-2 years. A used 6L80E transmission is pulled from a wrecked vehicle, so there’s no telling what may be wrong with it, or how long it will last.

Do I have a 6L80 or 6L90?

there is a 4 digit designation on it… the first digit is a number and designates the Model yr… the 2nd digit is either a “B” or a “C” or a “D”….. the B is for 6L50, the C is for a 6L80, and the D is for a 6L90….. so for example…. a 1DKA is a 2011 model yr 6L90 transmission…. the last two letters is the …

How much HP can a 4l80 handle?

How much power can the 4L80E handle? A totally stock unit or rebuild will typically live well with up to 450 flywheel HP/TQ.

How much HP can a stock 6L90 handle?

The 6L90 transmission is not a terrible transmission. In fact, it is a high-performance component capable of handling up to 700 horsepower.

How much torque can a stock 6L80E handle?

New SuperMatic 6L80E Six Speed Transmission Can Handle 650 LB-FT.

What year is 4L80?

GM 4L80-E transmission

4L80-E/4L85-E
Overview
Manufacturer General Motors
Production 1991–2013
Body and chassis

How do you reprogram a transmission control module?

Steps to Resetting Transmission Control Module

  1. Step 1: Turning Key Position. Before resetting the transmission control module, it is necessary to check the key position. …
  2. Step 2: Press gas pedal. …
  3. Step 3: Keep Waiting. …
  4. Step 4: Turning the Key Off. …
  5. Step 5: Releasing Gas Pedal. …
  6. Step 6: Wait Again. …
  7. Step 7: Ready.
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How do you relearn a 6L80 transmission?

With engine at idle, shift from REVERSE to DRIVE and leave shift lever in DRIVE for five (5) seconds. After five seconds, shift back to REVERSE and leave shift lever in REVERSE for five seconds. Perform this procedure twenty (20) times (R-D-R-D-R-D…).

Can you put a 6L90 in place of a 6L80?

I did the same thing,except I took parts off different donors ZL1’s. 6L80 converter will work with a 6L90. The TCM will have to be reflashed to a 6L90 at the dealership first,then it can be tuned normally.

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