Reply With Quoteive known wheel bearings to cause bad ass vibrations. even out of balance rims to give driveline vibrations.
the other thing could be your diff pinion angle
One piece tailshaft vibration
Anyone here use a 1 piece tailshaft in their 86? do you get any vibration at 100+kph or high rpm?
I recently put one in my car and I get this bad vibration whenever I got above 100kph. The tailshaft is brand new custom job with new uni and have been balanced several times. So what could be the cause of this?
ive known wheel bearings to cause bad ass vibrations. even out of balance rims to give driveline vibrations.
the other thing could be your diff pinion angle
I have all new wheel bearings and diff bearings. Not sure about the pinion angle. The car is lowered but I don't think it is low enough to significantly change the pinion angle.
so your saying that the vibration has started after you put the 1peice shaft in? are you able to put a 2-peice shaft back in and test it?
(im thinking this may not be possible if your engine/diff is a custom job, to require the 1 peice shaft)
how are your engine and gearbox mounts? you say its high rpm related, does it do it cruising at 100+ (5th gear off throttle)?
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tailshaft was measured to compensate the height your car is now right ? and done by a proper tailshaft place so its balanced correctly?
what's the place who made your shaft say?
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and your rear tyres are ok? not out of balance. youd be surprised at how much vibration out of balance or shit tyres can give you. esp at that sort of speed it tends to be more tyres. normally when tailshafts are out they tend to be bad at lower speeds then worse at higher speeds.
Thanks for all the suggestions guys. I took the car back to the tailshaft place. They had a look at it and concluded that the difference between the angle of the pinion and the gearbox was too much something like 5 degrees out and as a result making the uni works outside of their optimal range which is like 3 degrees max.
Anyway they ended up recondition my spare two piece tailshaft with new joints and put that back in. There is still some vibration but no where near as bad. I will play with the rear ride height or try spacing the center bearing so it sits lower so the angle is closer to 0 on the weekend and see what happen.
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