Could the wrong diff oil cause thw diff to tighten up too much?

Submitted: Tuesday, Feb 03, 2009 at 21:05
ThreadID: 65675 Views:10779 Replies:6 FollowUps:1
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Bought a 1991 GQ Patrol about 6 months ago. Took it straight to my local mechanic who changed ALL the oils from front to back.
My rear diff seems VERY tight! Sometimes when I back out my driveway or a parking space, it feels like the diff almost locks and I have to drive/force the vehicle through the resistance. Not every time. Then this afternoon I did a quite sharp turn on bitumen and the rear tyres screeched.
My question is, could changing to a different brand of diff oil have caused these problems? and/or could changing to another brand of diff oil help solve the situtation?
Thanks in advance.
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