abodyjoe
Well-Known Member
Well whatever it is he replaces it and bolts it in. . Not sure on the brand or part number but they last for me whatever it is.
Go to www.tcsproducts.com and look through their web page and see what is available for the 904. They and other performance automatic transmission companies will have what you need to build any 904 you want.
If it was mine: and I wasn't racing --> Raybestos waffle lined friction plates, along with new steel plates, Overhaul gasket and seal kit of course, new bands (Kevlar if you so desire), bushing kit, washer kit, roller sprag kit, TF-2 transgo shift kit, filter, output shaft bearing (it's old and got a lot of miles on it). In other words, a complete, no short cuts taken rebuild. Check and then recheck the planataries for excessive wear or sloppiness, look closely at the pump gears and replace if questionable, look at the input shaft for spline wear, replace the forward clutch diaphragm spring (prone to cracking) and look closely at the two drums for wear. Update the reverse servo piston, get the intermediate accumulator repair kit. I would think that this would/could hold up to 350/400 HP.
Now if you're racing, that opens up a whole other thing. Getting ANY transmission to live up to the racing life depends on the thickness of your wallet.
Others may disagree.
I'm not a transmission builder but worked for almost 30 years in the transmission parts and converter business. Most of my information comes from observing and listening to builders that I'd trust with my mothers car. Over the years I watched these builders put everyday and performance transmissions together. They all had one thing in common, they wanted to do them right. One very good builder quit the shop he was working for because the new owner wanted him to take every short cut possible, something that he would not do.
I bought a 74 Challenger back in 2002 from the original owner. It had about 32000 miles on it, and other than taking it out in the driveway once and a while to warm the juices up, it hadn't been on the road for over 20 years. Lots of oil leaks of course from sitting, and when I spoke to the guy that ended up building my trans, I told him just to do a re - seal, he said no way. "It's been sitting for a long time and it should be gone through properly". It was good advise as we found parts inside that would have probably failed sooner than later. Doing a quick re-seal wouldn't have found these issues.
The best advise I can give anyone doing their own or having someone build their transmission is:
DO IT RIGHT --- ONCE