Hey guys i have a tranny in my silverado 01 but something is wrong with it does not go foward when is on drive buy goes foward when you put it on 1 and 2 shift and it does go reverse what could it be it does not have the same power as it use to have when you at it on 1 or 2 shift any one knows what it can be thanks

 

I believe from what you have described you have suffered an input sprag failure. Vince

 

Same thing happened to mine. Reverse was gone for a couple days but randomly came back. Had to drive in 1 then 2 then could go to D. If I gave it over 2k rpm in 1/2 there'd be a grinding noise.

Where are you located?

 

I an locate in houston mine does the same thing as yours i hear also a grindind noise do yall know around how much it will cost to fix it

 

I'd call around some shops if you were looking to go the cheap route.
I'm assuming it's a 4L60e, cheapest way would to have it rebuilt ( mine as well freshen it up if it's out of the truck)

How many miles on it?

 

I'm sure there are a lot of reputable builders in the area. A lot of guys (and possibly women) on here are from Texas. If you're looking to upgrade check out the pt.net sponsors such as FLT and Performance Built. Links are on the side------->

 

My tranny has 118,xxx miles so do i need to rebuilt it also what i need to do i want to get the tranny to hold up to 450hp or 400hp

 

Either a reputable tranny shop that knows about 4l60e's, upgrade to a 4L80e, or get a performance built lvl 2 or up replacement /or FLT lvl 5-7

 

I just want to replace the one i have it is stock what should i do to it i will like to upgrade to alevel 2 on my stock tranny wat do you think