4L80-E big boy trans 99 Express
 

was rebuilt appox. 60,000 miles ago and that is a really high estimate. Will warranty it.

$650 shipped CONUS

Re: 4L80-E big boy trans 99 Express
 

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Re: 4L80-E big boy trans 99 Express
 

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Re: 4L80-E big boy trans 99 Express
 

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Re: 4L80-E big boy trans 99 Express
 

What engine was it behind??

Re: 4L80-E big boy trans 99 Express
 

It was behind 1999 5.7 Vortec. I can get some numbers if interested.

Re: 4L80-E big boy trans 99 Express
 

I was hoping it was off an LS style engine. Thanks for getting back to me,

regards

Re: 4L80-E big boy trans 99 Express
 

do you still have it? do you know if it will fit one a 8.1?

Re: 4L80-E big boy trans 99 Express
 

Hey you are close!!!! I will check

Re: 4L80-E big boy trans 99 Express
 

Is this possible? In other words, if I take an 8.1L power plant with it's PCM and swap it into an older 3/4 ton Suburban that originally came with a 4L80E, can that 8.1L PCM control the older 4L80E? Or will I need to swap something out in the transmission?

It depends. If the 8.1L had a 4L80E behind, obviously yes. If the PCM had an Allison, but has the same OS number as a tune that had a 4L80E, then yes, do a segment swap. Also, if the 4L80E has the original style (91-92) internal harness, it will need to be updated. If its an 04+ PCM, will probably need an 04+ force motor in the 4L80E.

From other info I read it should mount right up. A lot of 8.1's had the Allison setup behind it but here:

Here is a list that I condensed down to the 4L80E for Chevy.

AVALANCHE 02-03 4 SP RWD/4X4 V8 8.1L 4L80E

C/K PICK-UP 1500-2500 95-99 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/6.5L DIESEL 4L80E 17 BOLT PAN

C/K PICK-UP 1500 00-03 4 SP RWD/4X4 V8 6.0L 4L80E

C/K PICK-UP 2500 00-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5 DIESEL 4L80E

C/K PICK-UP 3500 95-03 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL 4L80E 17 BOLT PAN

SUBURBAN 1500-2500 95 4 SP RWD/4X4 V8 7.4L/6.5L DIESEL 4L80E

SUBURBAN 1500 96-99 4 SP RWD/4X4 V8 6.5L DIESEL 4L80E

SUBURBAN 2500 96-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5L DIESEL 4L80E

TAHOE/YUKON 95-03 4 SP RWD/4X4 V8 6.0L/8.1L/6.5L DIESEL 4L80E

VAN FULL SIZE 2500 96-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/8.1L 6.5L DIESEL 4L80E 17 BOLT PAN

VAN FULL SIZE 3500 95-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL 4L80E 17 BOLT PAN

Re: 4L80-E big boy trans 99 Express
 

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