Thank you so much for the insights!
I just received the ATSG books on the 4L80e.
VERY impressed with all the information,
pictures and schematics!
I was more than likely going to use the 1991 trans
and just build it for slightly heavier duty use.
Pick and choose on the hard parts...
I think I...
I have a 1991 Chev. Suburban, 3/4 ton,
2WD with a 454 and 4L80e transmission.
All totally stock.
Trans is tired .
I will be rebuilding a new to the truck 4L80e.
I want to update the transmission to the newer (post 1996)
style.
Question is WHAT year 4L80e are the best for all automatic...