i plan on having 800ish rwhp via turbo...
my question is what kit would you recommend to build my 2005 4l80e w/22k miles on it..

this will be a street truck and i will be driving it if that makes a difference

 

With only 22k miles on it, I would just add a Transgo HD shift kit and call it a day. There are plenty of big HP cars/trucks running a stock 4L80E with a shift kit and a stall.

If/when it starts slipping down the road, look into a performance rebuild kit from one of the tranny vendors.

Rick

 

im running a stock 40k mile 80 with a trans go hd2 and might be making 500....... So far so good!!!!

 

HD-2

http://www.summitracing.com/parts/TRG-4L80E-HD2/

 

what about sprags??

 

Just order you a FLT Lvl4 80E

I still got my stock 80E that has over 100k miles on it with a HD2 and she is still kicking just fine.

Some say the go with the 34 element, some say stick with the other ones.. ask 20 people get 20 different questions.

 

https://www.performancetrucks.net/fo...d.php?t=464448

 

what EXACTLY does the sprag gain or loose by changing it?

 

a sprag is a one way clutch, the more elements in the sprag the more holding power.

make sure it has the 34 element sprag- if you are gonn aover haul the unit make sure to replace all of them for good insurance. or if you have a giant pile of cash, just buy one already built