Just got in from a 400 mile trip pulling 12' cargo trailer with two motorcycles. Unloaded and went to store noticed a lite sqeeling noise when turning tight circle in parking lot. Had wife drive around in circle and it is coming from the rear end sounds like a tire rubbing but nothing rubbing. Checked fluid level ok. The rear end has always made a slight roaring noise since new. The mileage is only 28,000. Got me puzzeled! What about putting syn. GL5 gear lube, it has made a difference in all our motorcycle trans. and rear ends (BMW)
Any help would be greatly appreciated.
Mike

 

If it's a limited-slip differential, it's possible that the clutches are grabbing and the squeal you're hearing are the tires. If this is the case, then replacing the rear end fluid with the correct limited-slip fluid could solve the problem.

 

Thanks Alloro Just a quick question would a corp.9 anti spin3.55 be ok to use synt. 75w90 mobil 1 ?
Or just use a 80w90 dino with the additive be preferable?
Thanks in Advance
Mike

 

Either Royal Purple 75W-90 or the Mobile 1 75W-90 will get you better wear and gas mileage over the dino oil.
I know the RP already has the LSD additive in it, but I'm not sure if the Mobile 1 does.