GU Drive train vibration

[1peter]

In another post i mentioned a vibration my truck has got when i take off in 1st gear (auto box 4.5 engine). I have since realized that it only does this when turnig as you take off eg: stopped at an intersection waiting to turn, as i take off and turn the corner there is a slight vibration through the drive train somewhere ?? I spoke to a 4X mechanic and before i could say anything he asked me if it did it when i was turning, when i said yes he said it is normal with GU's and it is because of the limited slip diff. Is this true of other Gu owners on this Forum ?? I am going to get the diff oil changed regardless but i am just curious to see if other owners have the same issue ??

[AB]

In another post i mentioned a vibration my truck has got when i take off in 1st gear (auto box 4.5 engine). I have since realized that it only does this when turnig as you take off eg: stopped at an intersection waiting to turn, as i take off and turn the corner there is a slight vibration through the drive train somewhere ?? I spoke to a 4X mechanic and before i could say anything he asked me if it did it when i was turning, when i said yes he said it is normal with GU's and it is because of the limited slip diff. Is this true of other Gu owners on this Forum ?? I am going to get the diff oil changed regardless but i am just curious to see if other owners have the same issue ??

Hi mate, does it only do it on tight turns or just any type of turn?

[YNOT]

My first GQ did exactly the same thing. I changed the rear diff oil to Castrol SAFXA (85W140) and never had another problem.

Tony

[patch697]

My first GQ did exactly the same thing. I changed the rear diff oil to Castrol SAFXA and never had another problem.

Tony

Cheers Tony that just saved me a phone call to ya cos the Mav has just started doing the same thing but only after I've been driving a bit & the Diff has had a chance to warm up..

I recently changed all the box (5spd) & diff oils using fuocs but since then the box is changing like sh!t & the LSD has started getting grabby in the corners when warmed up......

Any recommendations for box, transfer & front diff?

[YNOT]

I like Castrol oils, a bit more expensive but I've never had a problem when I've been using them.
80W90 for gearbox and transfer, LSX90 for the front diff.
I have seen people use auto trans fluid (like Dexron II) in manuals to improve gearshifts but that was in smaller gearboxes, I don't know that I would like to try that in an older and bigger gearbox like you have.

Tony

[1peter]

AB, usually when making left or right hand turns going around corners and only after stopping or slowing down to almost a stop. I will try YNOT's advice and change the diff oil then see how she goes. Thanks for the feedback.

[1peter]

Diff oil is changed and the problem is all but gone.

[AB]

Cheers for getting back to the post mate, good to hear!

[1peter]

Thanks AB.