Have a 72 302 grabber with the C4 I put a B&M Streetfighter converter in it and after about 500 miles I now have a delay of anywhere from 30 seconds to three minutes going to drive once it engages it'll run all day long it does not slip don't know if I have a pressure problem bands are in adjustment no material in the pan any ideas
I pulled the transmission out put new seals in the case for the kickdown lever check the valve body bolts on the way back in torqued them properly they weren't loose Now I've got a delay in the drive that could take anywhere from 1 to 20 minutes for it to go into drive once it goes into drive I'm good to go until I shut it off again no problems could happen one time could happen every time
Not what you want to hear but I would pull it out again and check the pump, Sounds like the pump gears got boogered with the new converter.