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PKN

2006 TT - Thumping from right rear when accelerating....

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The cardan shaft has been replaced over 50K miles ago and the noise has JUST started. I thought I had a flat tire (right rear) but when I backed off the loud pedal, the noise went away. I can see no obvious problem under the car and if I accelerate slowly, I don't get the noise. I did get under the car and there is quite a bit of movement in the center bearing of the cardan shaft (maybe quarter inch in all directions) but I am not sure if that is normal.

 

I would have suspected the center bearing except that the noise seems to be coming from the right rear wheel and NOT the front console area but I know sound can travel in strange ways.

 

My TT has done over 113000 miles and I have replaced all of the usual stuff - coolant pipes/T's, oxygen sensors, coolant tank, plug packs, brake rotors, cardan shaft (warranty by PO). She runs like a champ and goes like a scalded cat except for this latest issue. What is the opinion of this august group and if it is the cv joint, how big of a deal is it?

 

One last point, I have had a strange smell - like cat pee - which started around the time I mounted new tires. When I sniff the warm tires it isn't there. Is this coincidence or could it be wear in a joint somewhere?

 

Steve

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Sure enough it was the driveshaft. I ordered a full unit from Coloradodriveshaft and it got here in just 4 days complete with a return shipping label. It was a breeze to fit taking about an hour each way. Total cost just $350 and it is fully balanced.

Great guys and great service. I recommend them. I also recommend buying a four post lift if you don't already have one !

Steve

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The cardan shaft has been replaced over 50K miles ago and the noise has JUST started. I thought I had a flat tire (right rear) but when I backed off the loud pedal, the noise went away. I can see no obvious problem under the car and if I accelerate slowly, I don't get the noise. I did get under the car and there is quite a bit of movement in the center bearing of the cardan shaft (maybe quarter inch in all directions) but I am not sure if that is normal.

 

I would have suspected the center bearing except that the noise seems to be coming from the right rear wheel and NOT the front console area but I know sound can travel in strange ways.

 

My TT has done over 113000 miles and I have replaced all of the usual stuff - coolant pipes/T's, oxygen sensors, coolant tank, plug packs, brake rotors, cardan shaft (warranty by PO). She runs like a champ and goes like a scalded cat except for this latest issue. What is the opinion of this august group and if it is the cv joint, how big of a deal is it?

 

One last point, I have had a strange smell - like cat pee - which started around the time I mounted new tires. When I sniff the warm tires it isn't there. Is this coincidence or could it be wear in a joint somewhere?

 

Steve

 

Some brands of synthetic power steering or synthetic automatic transmission fluid smells like cat urine to me. 

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Have you checked for a cat?  I had a raccoon climb in through the roof of my 944 once.

Edited by ARModen

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