Diff Companion Flange / Pinion Damper Knocking
#1
Diff Companion Flange / Pinion Damper Knocking
It seems to have many names but my car has a knocking noise coming from under the car when going over rough ground and this seems to be the fault.
I've seen that the rubber damper has some movement but is not loose.
When you tap the rubber damper, in the direction of the propshaft, with a rubber mallet the knocking noise can be heard.
I've had the propshaft quickly inspected and there isn't an obvious problem there.
Has anyone had this problem before?
What is exactly causing the knocking noise?
If I was to cut off the rubber damper would this fix the problem?
I've seen that the rubber damper has some movement but is not loose.
When you tap the rubber damper, in the direction of the propshaft, with a rubber mallet the knocking noise can be heard.
I've had the propshaft quickly inspected and there isn't an obvious problem there.
Has anyone had this problem before?
What is exactly causing the knocking noise?
If I was to cut off the rubber damper would this fix the problem?
#2
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
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I had the rubber damper come completely loose on Theseus. That produces one hell of a vibration at 140mph. You can remove it, but you will hear more drivetrain noise, particularly on decel. Removing it requires cutting it off carefully or removing the pinion flange, and removing the pinion flange requires resetting the pinion depth (essentially a full rebuild).
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