My friend wants to rebuild his 700R4 in his 90 IROC. How hard is it? I rebuilt my T-5 in my Mustang myself but I know there is alot more to an auto trans. I work at a GM dealer in parts so I know there is quite a bit too them. I ask the mechanics but you may know how that goes. They think since I'm "just a parts guy" that I'm dumb. Of course I've done alot more work on cars than half the guys in the shop!! Thanks!

 

Take a look at this board again and you will find two threads from people who have done this recently.

 

Not to hard if you have the special tools and a good rebuild manual. I used a Haynes 700R4 rebuild manual and the GM factory service manual. I also purchase the Low Reverse clutch spring compressor, the over run clutch spring compressor, input clutch assembly seal installer and sizer. Many other tools are spec'd but I didn't use them, use common tools. I recommend buying the Hughes complete rebuilt kit with Red Alto Race Frictions (summit carries). It also has a kevlar 2-4 band. Don't waste your time with the B&M Trans Kit (OK, but not heavy duty enough). I used the B&M Transkit, upgraded to the Alto Red 9 friction 3-4 clutch pack, and a corvette 2-4 servo (more apply pressure). Car will bark third gear with BFG Drag Radials. Just follow all directions and set all clearances correctly. I bought the special tools from Snap-On, may be available elsewhere.

Let me know if I can help.
brl90Iroc

 

I did mine and it was not bad at all. I had never seen the inside of an auto transmission other than installing a shift kit. I took it over to my Dad's place and we rebuilt it. (dad was an Allison auto guy in the 70's and 80's) I rebuilt it with his supervision. I made a giant C-clamp to remove the servo cover and it also worked for compressing some of the clutches. Dad also had the special snap ring pliers, they are not like a standard snap ring pliers. You might be able to pick those up at sears.

Get an ASTG manual, and the proper tools, then jump into it. I wouldn't do it if it is your daily driver though, because things have a way of taking longer than expected and you are left without a car. I had my tranny out for 2 months, but it was not priority and my TransAm is just for fun. It has been down for 1.5 years so far but I am starting to see the light at the end of the tunnle.