First thing I'd do is test the engine braking from about 25 mph. There should be MORE engine braking in manual low gear than in manual second, and essentially none in "Drive".
Try this first, either way, your looking at having yours rebuilt or getting a known good trans installed
98 Regal GS - 275k, on the race to 300k
99 Silverado Z71 - 204k, BGA express
03 Grand Prix GT - 81k, Hopefully will see the road again someday
97 Grand Prix GTP - 173k, Sloppy Seconds V2.0
Originally Posted by BXX
Al is a big sexy stud
Originally Posted by 95GPSE
But the Grand Prix is a Grand Prix, which automatically trumps all.
Thanks, I guess that's about it. I guess I was hoping that it could be a bearing or something easy/inexpensive (no idea what I'm talking about). Thank you all though, and I guess if I decide to fix it, I'll report back the true solution.