Acceleration thud!

[Miles James]

When on the gas after slowing down or stopping I get a single thump or a thud feeling from under the  drivers seat or back of the car area...  gear changes are smooth I dint get any knocks or thumps then. Literally when I step on the gas in lower speeds... it’s as if it’s taking up slack in the drivetrain somewhere?? I also get like a whistle  at 40- 70 ish mph. Very high pitched. Not your typical whine noise... please help?

[bigbuzuki]

Thud could be centre bearing carrier for the rear cardon shaft.

 

Whistle may be evident if your aircon servo flaps are closed. Try opening them by turning on the fan and having air flowing to the outlets.

[Rick150]

If you have done 90k km or multiples of the the cardon shaft bearing need replacing before it costs you a whole shaft. Easy to check, get a small wreaking bar and move the shaft up and down, if you see cracks in the rubber around the bearing then replace it now!

 

 

[vrichmd]

Check your flex disc first.  I have an '03 CTT and what my late mother called a "leadfoot".  I've replaced the cardan shaft/bearing assembly twice and recently thought it had gone again.  Turned out to be the flex disc which had been replaced both times, but failed with only a few thousand miles on it.