corvette_uae1

hi guys

well i have an 2006 chevy silverado 4wd

with a turbo kit im going to raise my boost to 20p.s.i

well i should gain something around 600hp to 800 hp maximium i guess

but im confused which gearbox should i go for !!!!

4L65/70E-5 Extreme Duty – Level 5
Price: $2,550.00

Options
Vacuum mod kit: $120.00
300M Billet 4X4 output shaft: $549.00
300M Billet 2wd output shaft: $579.00


or

4L80E-5 Extreme Duty – Level 5
Price: $3,450.00

Options
Vacuum Modulator Kit: $125.00
Deep Pan Kit: $195.00


well i thought that the 4l80 is much stronger than the 4l60 right or im wrong ???

cuZ I WANT a gearbox that will live for atleast 3 years without any issues .

what do u think guyZ ??

00ChevyScott

iTrader: (10)

4L80 hands down.

ZO6Ted

FWIW, my info is second hand. I understand that the 4l80E is the favorite. Although strong, I think a couple of people have killed the 4l60E when they start getting deeper into the 11's with a heavy truck. Very good vendor!

trever1t

iTrader: (14)

Do the 80e.....and don't look back!

corvette_uae1

thanks alot guys then ill go for the 4l80

but i have a small qusetion?

would it fit directly on my truck or i have to do some modification or buy an adapter or whatever ???

Wilde Racing

iTrader: (26)

Not a bolt in, but easy enough...
The 4l80e is longer, has a extra extranial speed sensor, and a different output shaft.
The transfercase inputshaft gear needs to be swaped.
Rear drive shaft needs to be shorter, front drive shaft needs to be longer.
A small two wire harness is needed.
The rans cross cross member nedds to be modified...

nightrunner

iTrader: (4)

def. go 80e

corvette_uae1

wow thats too much to do

what shafts should i put then as u said rear shaft have to be shorter and the front longer??

do u mean buy an aftermarket shaft from an 4l80 which comes in 3500 sierra ???

trever1t

iTrader: (14)

Not that big of a deal as a lot of guys here have done the swap, i think if you search you might even find a step by step iirc.

hyeride00

I swapped my 60e out for an 80e a little over 4 years ago. i love it and dont regret it one bit. it was worth the hassle. i am trying to remember everything i had to do for the swap...some of the guys already mentioned some of them above, so this might be a repeat....

--got a harness from speartech that was for the speed sensor, which included prongs i had to add into the pcm harness
--different dipstick/tube for the 80e (i ordered one out of a 2500 with a 6.0/80e combo)
--in my particular situation, i had to get a different flexplate/adapter..but i have been told the cranks lengths changed and you may or may not need to do this...
--modified the cross member..i have pictures that i could locate if needed
--i had to put a new yoke on the drive shaft, but i didnt have to shorten it, as the 60e and 80e were the same length...i know most say they differ...but the tape measure didnt lie..and i had mutliple people check cause i always thought they were different. but mine is only 2WD so i dont know if that makes a difference
--had to have my PCM tuned to control the new tranny/engine combo
--obviously the 80e converter....
--i replaced the tranny cooler line (again purchased one for a similar length truck with an 80e in it...some guys modify theirs with some type of flex tubing that seems to be working ok
--misc different length bolts and what not...

i cant think of anything else at the moment...i feel like i am missing something...its been a while...but i will remember soon...i am gonna pull it out to get rebuilt when my engine is out for a 370 swap...hope it helps