5.0MX5
Member
- Joined
- Jan 27, 2019
- Messages
- 70
- Reaction score
- 35
- Points
- 18
- Buick Ownership
- 1998 Park Avenue, 2001 Park Avenue, 2005 Park Avenue
I did receive helpful advice on an earlier query about the Son's (now looks like our) 1998 Buick Park Avenue's transmission. I recently dropped the subframe and pulled the end of the transmission (after removing the left axle and strut assembly) and replaced two shift solenoids and shift modulator assembly and changed fluid and filter. Since then the 4T65E transmission shifts great with no codes.
Now for the problem. First test drive and a loud growling, almost grinding sound that seems to come from the right front when driving, ridding shotgun seems to be from front left front. When you turn right, loud noise, turn left, no noise. Sometimes slight noise going straight, turn left while driving and noise goes away, zero noise. What I've done to try and find and fix the noise.
Check for anything rubbing, found a couple issues ,one with the plastic belly pan and one with dust cover behind the rotor on right side. Fixed those, no change.
Swapped hub bearing on both sides with known good units, no change.
Changed front, right side and rear transmission/motor mounts (left side was removed when dropping subframe and is good), no change.
Pressurized exhaust system, small leak in exhaust headpipe gasket (where it attached to rear exhaust manifold), changed gasket. No help.
This all started when I pulled the left front axle and end off the transmission. No issues at all with reassembly. I've pulled axles a few times on this transmission usually due to leaking cv boots. Never had an issue.
The noise is only when driving. I've tried to cause it with hood up and someone in the car with it in gear, and power braking. No noise. It's got to be moving.
At this point I'm seriously considering taking it to a pro, but with the low market value of the car it's not something I'm likely to do. I'm considered spending $100 for a set of diagnostic mikes that can help pinpoint noises. But I'm really tired of sending good money (and labor) down the same hole with no results.
'
All help is appreciated.
Now for the problem. First test drive and a loud growling, almost grinding sound that seems to come from the right front when driving, ridding shotgun seems to be from front left front. When you turn right, loud noise, turn left, no noise. Sometimes slight noise going straight, turn left while driving and noise goes away, zero noise. What I've done to try and find and fix the noise.
Check for anything rubbing, found a couple issues ,one with the plastic belly pan and one with dust cover behind the rotor on right side. Fixed those, no change.
Swapped hub bearing on both sides with known good units, no change.
Changed front, right side and rear transmission/motor mounts (left side was removed when dropping subframe and is good), no change.
Pressurized exhaust system, small leak in exhaust headpipe gasket (where it attached to rear exhaust manifold), changed gasket. No help.
This all started when I pulled the left front axle and end off the transmission. No issues at all with reassembly. I've pulled axles a few times on this transmission usually due to leaking cv boots. Never had an issue.
The noise is only when driving. I've tried to cause it with hood up and someone in the car with it in gear, and power braking. No noise. It's got to be moving.
At this point I'm seriously considering taking it to a pro, but with the low market value of the car it's not something I'm likely to do. I'm considered spending $100 for a set of diagnostic mikes that can help pinpoint noises. But I'm really tired of sending good money (and labor) down the same hole with no results.
'
All help is appreciated.
