Driveshaft Trouble

[TJ Chaddy]

Hi Guys,

Over the weekend i have destroyed my rear driveshaft for the 2nd time.

1st time i was climbing beer o'clock hill at the springs when i completely snapped a bolt on the diff side. this then threw my driveshaft everywhere and destroyed it.

On saturday I snapped a uni joint, which then tore out the ring where the uni joint sat in. (also broke an upgraded U-bolt kit) Its starting to become an expensive excercise as these parts dont come cheap.

does anyone have any suggestions or recommentations.

(im running 15x8s with 32x11.5x15 cooper STT tyres on standard gearing)

pics to come tonight

[carlosprite]

Too much wheel spin, and when it gets traction it snaps?

Are all your angles set up correctly?

[TJ Chaddy]

thats what generally has happened (wheel spin) but not enough to do that kind of damage. Im not sure if my angles have been setup.

[hophoar]

have you got any sort of transmission spacers /motor mount lift or adjustable control arms to help elieviate the angles on the unis.

[TJ Chaddy]

Originally Posted by hophoar

have you got any sort of transmission spacers /motor mount lift or adjustable control arms to help elieviate the angles on the unis.

no transmission or motor mounts. i dont believe i have control arms. ill be going to the brisbane jeep club toolbox on saturday so hopefully someone there can talk to me about it.

[Kiwi Jeeper]

Just so that I understand, you are running 3" lift with no changes to motor mounts, transmission skid, slip yoke, and rear control arms. If all you have done is lifted it 3" with no other modifications to compensate and correct driveline angles, driveshaft u-joints would be excessive stress when rear axle cycles through the motion range. Add wheel spin to mix, something has to give. Usually the weakest link breaks.

[Tassie Jeeper]

Originally Posted by Kiwi Jeeper

Just so that I understand, you are running 3" lift with no changes to motor mounts, transmission skid, slip yoke, and rear control arms. If all you have done is lifted it 3" with no other modifications to compensate and correct driveline angles, driveshaft u-joints would be excessive stress when rear axle cycles through the motion range. Add wheel spin to mix, something has to give. Usually the weakest link breaks.

thats my thoughts too as i wouldnt beleive an open diff with that size tyre should brake them regularly then again i have mechanical symphony and havent broke a driveshaft or axle in the three years iv had it and wheeled the crap outa it too