RR CLASSIC LWB REAR VIBRATION

Mar 14, 2006 3 Replies
M

Ok hers a series of unusual events that i cannot make sense of



  1. got a new tire on the rear passside at sams club and put it on. got immediate bad vibration in the rear end thought bad balance job so i took it back
  2. put it on again got immediate bad vibration so i took it back and got a new tire
  3. put it on again still vibrating so i poked around

ujoints looked good but i noticed an perfectly square rust spot next to an existing balancing weight on the rear propshaft/driveshaft



  1. i took the shaft off and drove the RR surprise no vibration so i took the shaft to be balanced put the shaft back on and STILL VIBRATING IN THE REAR END
  2. JUST FOR PRACTICE...since i need practice working on the car...i took the shaft off and changed the u joints...just in case

ITS STILL VIBRATING



SO WHY DOES IT NOT VIBRATE WITH THE SHAFT OFF? it makes sense to me that the problem is in the shaft since the problem goes away when its off. as i see it all the components that are in the rear end still turn when the drive shaft is not pushing the car? IDEAS?



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L

Owners manual says to stick the Diff lock on when jacking the vehicle... IF it was put on it wasn't left on was it??? I'm assuming you had to put it on to get drive for the test with the front prop only unless you have a RRC with a viscous coupling in which case it could be the cupling thats failed.

Lee

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A

On or around Tue, 14 Mar 2006 23:10:24 -0000, "Lee_D" enlightened us thusly:

There's a mystery vibe on the disco here, too - replaced one of the front UJs, which made much less vibe, but it still vibes a bit.

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O

If you've got a rusty square next to a balance weight it looks like you have lost a weight next to the other one. Try putting a jubilee clip round the prop (easy to fit if you unscrew it completely) and tightening it with the heavy bit (where it joins) over the rusty square and drive it to see if it makes any difference. Fit more than one if necessary and move them about a bit until you get it right. If you can't sort it like this then take it for rebalancing to someone who manufactures them or fit another prop.

HTH Martin

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