You won't be the first person who's made this mistake! I had the same problem a few years back when I installed a hi stall TC in my 99 Z28 Camaro with a 4L60E transmission. I found out after you have to rotate the TC and seat it in looking for 3 clunks on an 4L60E.
I bolted them up and broke the transmission pump in the 4L60E. I had to buy a new pump inards and take the transmission out and replace all the broken parts. I had to get my brother to help with the transmission repair as he worked in an auto transmission workshop for a while and knows how to rebuild them!
I should have realised something was wrong as the TC was tight to the flexiplate before I bolted them together and would not spin freely! When I put the hi stall TC in my Firebird last week I rotated it about 4 times pushing it in to make sure I didn't make the same mistake again!
Last edited by ineedalager; 09/07/1006:24 AM.
67 Firebird 350, TH350 auto Convertible, B&M 3000 TC, 4bbl Edelbrock Performer carb and intake Black Jack headers,disc brake conversion. 10 bolt chevy axle with 3.73's and B&M Rachet shifter.