rickyzZ28

iTrader: (4)

To make a long story short my stock transmission gave out on last year Hot Rod Power tour and I ended up having to replace it on the road. A friend I met on the tour had a freshly rebuilt 700R4 with extra clutches and heavy duty internals. It was built by a local performance shop in Detroit, MI and was built to run behind a 502 in a truck. The guy who built the trans owns Thomson Automotive who builds motors and transmissions for GMs race cars and other projects so I know he knows his stuff.

It had been sitting for a couple of years and I bought it and the guy let me use his lift and shop to install it. I used a stock type convertor since I did not want to mess up the new trans by running my Vigilante. The problem I have with it is it will not shift into 3rd at full throttle. The trans shifts extremely hard on the 1-2 shift and shifts fine on the part throttle 2-3. I do not know if it has a vette servo or not and I put the tailsection from my stock trans on it. What are some things I can check to see why it will not shift. I have changed the fluid a few times and adjusted the cable to proper spec. I am going to be removing the trans to put my Vigilante back into it and I want to get this problem sorted out. I have never built a trans, but I have installed shift kits in some different models. I did not know if a check valve might be stuck or a ball got put into the wrong place. thanks for your help

Happy Fun Me

Make sure the shift cable is connected inside the transmission. I left mine disconected once when i swapped my tranny and it shifted really funky. Just an idea.