Why didn't this driveline shop provide a fitting and balancing service?? Take your car back and get them to fix it. What good is an upgraded tailshaft if it vibrates at 90kms/hr

Edited April 23, 201313 yr by josh_hammy

pretty sure the OP is in tassie, so taking the car to the shop is not an option.

just out of curiosity is it auto or manual? I've heard the vibration problem stems from the center bearing being to rigid.

A bearing that is less ridgid (or that has more clearance) will give more vibration on an out of balance shaft

I'd say stick on weights would fly off as soon as you gave it some stick...

Why, they stick onto the wheels? Even though the g forces are helping them as they are inside the wheel most times. The radius of the tailshaft is tiny compared to a rim. The forces would be a lot smaller, diff ratio only around 2.7 - 3.7 .

stopping b4 wikipellor

A bearing that is less ridgid (or that has more clearance) will give more vibration on an out of balance shaft

Normally yes, but the vibration is not being caused by it being out of balance. It's because the slip yoke is at the front of the shaft and the bearing is to ridgid to allow lateral movement of the tailshaft.

ah I get ya now.

not much axial float in that type of bearing, but they love high speed.

Unless they were some super sticky weld on weights then they'd come off. You can't really compare it to a wheel as the force is working against it... the faster your wheel spins the harder it sticks the weights on!

Cmon man think...speed tape it fixes everythink...

Had the same problem new shaft with f150 hd centre bearing and cv and the thing was a bloody nightmare at 100 kph on the freeway

So I took it back to the guy that did it

I was not happy so he put my car up on a four post hoist and took offthe rear wheels and held ute up on diff housing thenhe got a velcro stran tapped a weight to it and wrapped it around the back of the tailshaft

Put a dial indicator against the chassis and spun it up moving the weight around the shaft till the car got smooth

It feels ok but im not sure if this is the right way to do it

I need to get it on the freeway and drive it up there again

Tried spacing the centre bearing to different heights and also tried rotating the flange.

Nothing worked.

Took the car to them, to see if they could fix it. They couldn't fix it either.

So they are making me a new shaft.

Post up a pic of the new shaft when you get it. It'll be good to see what they changed.