salemetro

iTrader: (5)

I'm rebuilding a 4l80e for a swap (until I can afford a FLT unit), and am just curious if anyone knows of a driveline that might be a direct bolt-in for my 96 firebird.

Thanks.

slow67

iTrader: (2)

The 4L60E in F bodies and the 4L80E are the same length. You can use the stock driveshaft (with a conversion U joint and a new transmission slip yoke).

Make sure its a later model LS1 4L60E driveshaft....I think the older trannies are shorter.

Bersaglieri

iTrader: (13)

I know the LT1 4L60e's are shorter, not sure on LS1's. Dont know the original posters engine.

-Dustin-

slow67

iTrader: (2)

i reused my driveshaft in my swap.

MUSTANGBRKR02

iTrader: (91)

Only problem with the 96 is the standalone controller or going FMVB. The LS1 D/s is the same length i just had to swap the u joint.

salemetro

iTrader: (5)

Trans is from a 00 2500 expressvan, and I'm having the converter built to match the flexplate of the ffi lq4/l92 that I'm building for the swap. All of the vehicle wiring and ecu is being swapped to 2000 f-body, so my understanding is that the ecu should control the 4l80e without any problems other than a trans-harness modification and a few re-pins at the ecu......does this sound correct??

slow67

iTrader: (2)

Yep. I am controlling my 4L80 with my 2000 computer.

Lafngas

iTrader: (7)

Who made the ECM programming change, and what did it entail????

1BAD_LS1

iTrader: (36)

Subscribing......

How does the stock 4L80 compare to a built 4l60???? I might go this route if its cheaper and easy!

slow67

iTrader: (2)

I already had HPtuners. I sent my tune to support@hptuners.com, and a few days later, I had an email back with the tranny segment swapped. I did a write entire, and I was done.

A stock 4L80E should be good to 500-600rwhp stock, maybe more if the RPMs are kept down. Parish8 made into the 10s in a pickup with a stock one. If you do keep it stock, I recommend the Transgo shift kit that dual feeds the direct drum, it helps out with strength a lot.

blueflamespl

iTrader: (13)

Does anyone know if I can use my stock M6 drive shaft on a 4l80E swap with the stock rear (swaping yokes), In other words, will the length work?

Kurt

MUSTANGBRKR02

iTrader: (91)

yes length should be fine same as a A4 i believe.

blueflamespl

iTrader: (13)

Thanks.
Cool, that should let me get this up and running with the stock rear until I can afford a midwest 9".

slow67

iTrader: (2)

Same here. Stock d/s 10 bolt.

ShevrolayZ28

iTrader: (4)

you should check the length. the slip yoke should be 3/4-1" from bottoming out on the output shaft with the suspension fully loaded. If it's too long or too short you could do some damage.

On my car the stock DS is a tad shorter than I'd like it to be but figure it'll be ok for a test ride or two. This is with a Strange U1650 yoke.

slow67

iTrader: (2)

My 4L80 has a fully splined output shaft, so I got the 7" yoke, so the little extra that sticks out is ok for me.

chevyz2801

iTrader: (20)

i have a question, i have the yoke that was originally in the tranny and going to get a conversion u-jount, but the yoke will go in 3/4 than will stop but you can push it all the way in with little force but will pop out when you let go to me it seems like it is building up air pressure inside the yoke. The yoke doesn't have a hole in the end to let out air.

ShevrolayZ28

iTrader: (4)

7" from center of u-joint to center of u-joint? Or 7" overall? The one I am using is 5.5" from center to center.

slow67

iTrader: (2)

It is an O-ring inside the tailhousing. Do yourself a favor, and get an aftermarket yoke. Some people have had a VERY difficult time finding a conversion yoke for the stock 4L80 one. Its some wierd oddball one.

When you do switch yokes, put a regular (non-booted) rear seal on it, and take off the O ring (it is inside a pressed on sleeve on the tailshaft).

chevyz2801

iTrader: (20)

do you know any of the part # i will need and thanks