Hello so I have an 06 Grand Prix with a 3.8 l supercharged with the 4t65e - HD trans about the car a little over a year ago and the tranny started slipping immediately hard shifting I could tell it was going to go. So it finally did go and I could no longer accelerate from stop in first gear. So I went and I actually found an 06 supercharged Grand Prix in a Pick-A-Part junkyard that had been seized by the constable so I took a chance and I pulled the tranny let me start off by telling you I'm not a mechanic I'm a tradesman and I do all my mechanic work myself because it's too expensive to take it to a shop but I have never done anything close to a bigger job as a transmission but I figured whatever I take off I just put back on so I ended up changing the training with little problems. So I finally got to test drive it and it shifting good better than my car ever did but I do have a problem. So when I stop the car and drive actually or reverse just in gear then the torque converter starts making a loud noise almost like a grinding noise and the car feels like it's wanting to accelerate as soon as I let off the gas it pulls away faster than usual now when I'm in park or neutral I don't get the noise or the vibration but when I'm in drive and stopped I start getting that heavy vibration and almost like a grinding noise or maybe even sounds like it's idling high it's hard to describe but was just wondering if anybody had any advice for me. So basically I swapped a transmission out in my 06 Grand Prix same tranny as the original and now my torque converter or it sounds like it's coming from the torque converter is making a loud noise when non-accelerating in drive or gear but fine when driving.
