NZBen Member 50 Member For: 10y 6m 23d Gender: Male Location: Auckland Posted 11/04/15 07:02 AM Share Posted 11/04/15 07:02 AM I was at Hampton Downs the other week and found that at high speed - over 170kph, the car starts to shudder severely, the shudder continues till speed has dropped to below 130. It possibly gets slightly more severe if brake are applied but not certain. I know my diff bush is stuffed. The car is an 09 G6Et. Has anyone come across this before? Not sure if it's driveshaft, brakes, wheels or something else.Thx Link to comment Share on other sites More sharing options...
Wilko16 Donating Members 1,672 Member For: 17y 1m 8d Gender: Male Location: Melbourne Posted 11/04/15 07:56 AM Share Posted 11/04/15 07:56 AM Tailshaft !! Centre bearing most likelyOr even worse a loose wheel 1 Link to comment Share on other sites More sharing options...
Bizkets is Drunk? Too heavy needs boost Member 5,929 Member For: 11y 4m 23d Gender: Male Location: Adelaide Posted 11/04/15 08:01 AM Share Posted 11/04/15 08:01 AM My diff bushes are average and control are bushes are shot tail shaft takes a caning daily and this morning I hit 200+ and no wobble. Wheels need balancing maybe? Link to comment Share on other sites More sharing options...
Wilko16 Donating Members 1,672 Member For: 17y 1m 8d Gender: Male Location: Melbourne Posted 11/04/15 10:55 AM Share Posted 11/04/15 10:55 AM Haha I love reading how much you flog the piss out of it Great Job Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 3m 6d Gender: Male Location: Perth Posted 11/04/15 11:35 AM Share Posted 11/04/15 11:35 AM I was at Hampton Downs the other week and found that at high speed - over 170kph, the car starts to shudder severely, the shudder continues till speed has dropped to below 130. It possibly gets slightly more severe if brake are applied but not certain. I know my diff bush is stuffed. The car is an 09 G6Et. Has anyone come across this before? Not sure if it's driveshaft, brakes, wheels or something else.ThxUnder power? Under brakes? Or coasting Link to comment Share on other sites More sharing options...
NZBen Member 50 Member For: 10y 6m 23d Gender: Male Location: Auckland Posted 11/04/15 09:42 PM Author Share Posted 11/04/15 09:42 PM It happens under power accelerating, then coasting or braking back down till abt 130 Link to comment Share on other sites More sharing options...
NZBen Member 50 Member For: 10y 6m 23d Gender: Male Location: Auckland Posted 11/04/15 09:43 PM Author Share Posted 11/04/15 09:43 PM I might spin it up on a hoist and isolate any drivetrain issue Link to comment Share on other sites More sharing options...
Wilko16 Donating Members 1,672 Member For: 17y 1m 8d Gender: Male Location: Melbourne Posted 11/04/15 10:36 PM Share Posted 11/04/15 10:36 PM Good idea... Just remember te suspension is hanging on a hoist and could hide a driveshaft problem.Could lower the back control arms down onto jack stands to simulate sitting on the ground and see how you go spinning it up Link to comment Share on other sites More sharing options...
Bulletime Donating Members 937 Member For: 13y 11m 20d Gender: Male Posted 12/04/15 03:26 AM Share Posted 12/04/15 03:26 AM Tailshaft !! Centre bearing most likelyOr even worse a loose wheelthis^^^ had nine replaced recently with vibration under load more noticeable up hill so I'd imagine 170 would do it! Check for excessive play. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 3m 6d Gender: Male Location: Perth Posted 12/04/15 04:48 AM Share Posted 12/04/15 04:48 AM I'd suggest tail shaft as well given the speed range. Increase under braking could be another issue. Link to comment Share on other sites More sharing options...
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