I recently bought a 1999 GTP with a rebuilt transmission and i'm thinking it's just about shot again so whoever rebuilt it did a sucky job. Driving down the highway it'll ride around 1,000 rpm and I have to give it gas to get it up to about 3,500 rpm to really get it to accelerate where it jolts into what i'm assuming is 3rd. and the shifts from park into drive and from 1-2 are very slow and if I don't give it a second going from P-D it'll jolt real hard going into gear. I've also noticed it bangs a little getting into reverse too. Maybe i'm just being stupid and these things aren't a big deal but i'm new to this stuff. We've all gotta start somewhere hah. So my question is what should I do? Have the transmission rebuilt again, buy a rebuilt transmission and have it installed, or buy a new transmission and have it installed?