Transmission replacement

[roketrex]

Looking for some advice on my 2003 Z71 Avalanche.  Transmission is in need of replacing.  If I replace it with a rebuilt one, does it need to have the computer reflashed or will it drive properly without the hassles of going to a shop.

[CamGTP]

It would not require any computer reflash, there is no TCM on the older 4L60e.

 

You could buy a GM reman transmission and install no problem.

[roketrex]

That’s what I was hoping to hear.  Not sure where I’ll get a rebuilt transmission from yet, not sure who has the best price and quality.

[CamGTP]

Shop around and call a few places for sure.

 

GM parts direct has them for $2,100. I would call your local dealership for a prices and availability as well.

 

Summit Racing has a reman transmission for $1,600+ freight and you ship your core back. I would call them to make sure you get the correct one if you went that route.

 

Call a local transmission shop for a quote but many places may not do take outs for warranty reasons. Would be different if you had place do the work.

 

You'll want a new torque converter too. No sense in putting a used converter back into a new transmission.

 

 

[roketrex]

Thanks for help.  Looks like I’ll be doing some calling today.  Today was the first measure able snow fall, would have been nice to have the 4wd.

[diyer2]

I replaced my 4l60 in my 93 Silverado about 7 years ago with a GM trans. Best warranty back then. 3 years 36 K miles. 

I would go GM because they do a better job IMO.

Edited December 30, 2020 by diyer2

[Brian715]

Don't know about where you are but around here in Utah, there are lots of really good Transmission shops that probably have a 4l60 sitting on the shelf. Last one I had rebuilt cost me $700.  It's been a few years but I can't see paying more than $1000 for a stock transmission. Both of my rebuilds lasted well over any warranty mileage. Just my thoughts. Hope you get it back on the road soon.