Drive train noise developing
#1
Drive train noise developing
2001 996 Turbo with TipTronic. 88k miles - many on track, over 600 hp since new. Engine and transmission have been rebuilt.
The car has gradually started making a rumbling noise, similar to driving with spike tires on dry road. I thought it was just the Pirelli rears making noise but it has gotten gradually worse. Turning the tires over made no difference. I have not been able to lift all four wheels to try to diagnose but now think it is either the differential or a rear wheel bearing. Do you knowledgeable and experienced guys have suggestions of what may be the issue based on the above description?
The car has gradually started making a rumbling noise, similar to driving with spike tires on dry road. I thought it was just the Pirelli rears making noise but it has gotten gradually worse. Turning the tires over made no difference. I have not been able to lift all four wheels to try to diagnose but now think it is either the differential or a rear wheel bearing. Do you knowledgeable and experienced guys have suggestions of what may be the issue based on the above description?
#6
if you suspect a worn wheel bearing, a simple yet effective way to further diagnose this is to "slalom" left/right a few times. if the noise abates on turning then the wheel bearing on the opposite side of the turn indicates it is the source of the rumbling. e.g.. turn left - noise stops - check right rear, etc.
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08-08-2016 05:13 PM