Hey everyone-
This noise is driving me insane.
Whenever I tap the throttle, I get two successive soft clunking noises: one immediately after applying throttle and another when letting off. It sounds like its coming from the rear, but I can't be sure.
I've done a lot in attempt to remedy the situation. Originally, I suspected the differential, which was a 4.10 open with a standard bushing. I upgraded the diff to a rebuilt 4.10 LSD with a powerflex urethane bushing and made sure the halfshafts and diff bolts were torqued properly.
Noise persisted.
Next, I replaced the transmission mounts and checked the engine mounts. I even unbolted the flex disc to check the trans output shaft, but there was only a few millimeters of rotational play in either direction, which I have read is totally normal.
Noise persisted.
I felt discouraged at this point, since this indicated to me that the U-Joints, Flex Disc, or Center Support Bearing were likely shot. I decided to go ahead and replace everything in the drive line with a remaned driveshaft with serviceable U-Joints built by a BMW driveshaft specialist, a Febi Flex Disc and a Febi CSB.
The noise persists.
To be honest, I'm pretty confused. I replaced everything that is known to cause a "clunk" noise with throttle application. I'm starting to think that I'm trying to silence a noise that's normal.
Any other recommendations? Thanks!
This noise is driving me insane.
Whenever I tap the throttle, I get two successive soft clunking noises: one immediately after applying throttle and another when letting off. It sounds like its coming from the rear, but I can't be sure.
I've done a lot in attempt to remedy the situation. Originally, I suspected the differential, which was a 4.10 open with a standard bushing. I upgraded the diff to a rebuilt 4.10 LSD with a powerflex urethane bushing and made sure the halfshafts and diff bolts were torqued properly.
Noise persisted.
Next, I replaced the transmission mounts and checked the engine mounts. I even unbolted the flex disc to check the trans output shaft, but there was only a few millimeters of rotational play in either direction, which I have read is totally normal.
Noise persisted.
I felt discouraged at this point, since this indicated to me that the U-Joints, Flex Disc, or Center Support Bearing were likely shot. I decided to go ahead and replace everything in the drive line with a remaned driveshaft with serviceable U-Joints built by a BMW driveshaft specialist, a Febi Flex Disc and a Febi CSB.
The noise persists.
To be honest, I'm pretty confused. I replaced everything that is known to cause a "clunk" noise with throttle application. I'm starting to think that I'm trying to silence a noise that's normal.
Any other recommendations? Thanks!
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