Quote Originally Posted by GMC1994 View Post
Just came across this posting and I too am just starting my process.. 1994 GMC Sierra SLE Long Bed, 3/4 ton, 4X4, 4L80E(just had rebuilt so plan on keeping this a while), 5.7 TBI are the existing parts. Looking to swap a 5.3 or a 6.0 into the truck. So what you are saying is that I should be good to go with the 4L80E trans. But would this trans hold up to the new 6.0 LS?
4l80e trans is prpbably one of the strongest trans u can get. def handle a 6.0 with ease. ive seen some guys running 800hp set ups with a 4l80 with no problem