$ierraLY5

Is anybody running significant HP and torque through a stock 4L60E? I have the vette servo and will install a transgo shift kit. Any idea what the limit of this set-up is.
Oh, I have 3.42 rear gear. I'm thinkin of going with 3.73s. Any thoughts?

kazfan30

iTrader: (18)

Not sure about trucks, but i can say i was putting down mid 500's on a shot and mid 10's in my trans-am with over 100k miles on a stock 4L60e with a deep pan and big cooler. Its a gamble, but if you drive it right and understand the limits of it then you can make a 60 live a good while. Lets be honest some folks can tear up anything... just use your head.

1. Keep it cool and change the fluid
2. avoid drastic downshifts...(rolling around 20-30 mph and slamming it to the floor, trans goes from a high gear all the way back to 1st) that force and inertia is hell on stock internals!!
3. plan on eventually building it.

Jeteys5.3

iTrader: (4)

My stock 60e is holding up very well. Shifts better than it did stock! I only have a vette servo. I'd be careful with installing a shift kit, sometimes they can be setup to shift way too firm and will cause hard parts to break

I'd say put the vette servo in, get a good custom tune, keep the fluid changed when needed and if going with a bigger stall upgrade your trans cooler

$ierraLY5

Jeteys5.3, I have the factory tranny cooler. I don't plan on installing a stall as of yet, do you think my factory transmission cooler will do? And yes, I will be getting a custom Dyno tune shortly.

Mang213

iTrader: (1)

Get the largest possible tranny cooler, usually a 40k, and run it along with your stock cooler. If anything in the tranny breaks, it wont be because of heat damage at least. I got mine from Oregon Performance http://www.oregonperformancetransmis.../LNG-4739.html

wopc69

iTrader: (1)

Drastic downshifts is my favorite passtime and my 60e/65e holds just fine 90 thousand miles and counting in a heavy truck.

$ierraLY5

That's impressive on a supercharged AWD!! How do you like the transgo shift kit?

8.1 HD

iTrader: (3)

My 60e in the tahoe grenaded the forward sprag at 62k miles, just a bolt-on truck..I looked at it as a good time to build it the right way. I also run the Transgo kit you need to make sure your shift pressures are stock and zero out your shift timing to disable adaptive learning.

skipperdaddy

iTrader: (7)

yep yep... i have one and love it!!! cruising my trans stay at 120*... kickin it in the *** usually dont go above 150*!

iamkeniff

iTrader: (16)

im running a 60e with a vette servo, 3200 converter. i dont do that 4-1, 4-2 downshifts anymore thanks to Wheatley's input. plus my truck just spins if you flash the converter. i plan to go to a Performabuilt Level 2 soon. Skeet puts 500rwhp to a PB lvl 2. Truckshop runs a PB lvl 2 (420rwhp)
im about to swap to the 40k too, with a billet servo set up. i also run 4:10s bc it helps keeping the truck from being loaded too much.