I have the exact problem mentioned by another Sunfire owner. I'll copy and paste here:
I got a 1998 Pontiac Sunfire and got a loud grinding noise what appears to be coming from the transaxle on the passenger side of the vehicle. This noise is real evident as you are loading up the transmission and shifting through the 4 speed automatic transmission. It will smooth out once you get up to cruising speed. I've changed out the right side CV shaft assembly, the right hub assembly and replaced the bearing on the strut mount over on the right side. I'm at the end of the road with this issue. I sure could use some help. Also, the noise is even more evident when you have a passenger over in the right side seat. Sounds crazy doesn't it?
Can you replace the part where the axle fits into the transmission (transaxle I guess). I already replaced the hub assembly and the axle. "HELP!", . Thanks.
have the same problem?
Friday, October 10th, 2014 AT 6:44 PM