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75w - 140 oil ok for diff?
http://classiccamaroclub.mfatw.com/viewtopic.php?f=9&t=3764		 Page 1 of 1
Author:  p3te [Mon Mar 10, 2014 8:03 am ]
Post subject:  75w - 140 oil ok for diff?
I have a 1st gen with a powertrax no slip diff, some people say use normal 75w - 80 but some say 75 - 140 is better to make it run quieter, would the thicker stuff be ok to use or best stick to the thinner stuff, ive noticed a whine soubd when accelerating but its always done that since i got it so dont know if its normal, ive had the cover off and cant see any damage. No bits of metal in the oil or anything
Author:  3rdGenmalc [Mon Mar 10, 2014 10:33 am ]
Post subject:  Re: 75w - 140 oil ok for diff?
I have a PowerTrax too and have always used SAE 80w90.
A PowerTrax doesn´t whine just clicks.

I´m redoing my diff at the moment due to a whine on acceleration and deceleration, constant at 80mph.
I used a spacer instead of a crush sleeve and I think excessive preload on the pinion bearings is causing it.
Everything else checked out fine.
Author:  p3te [Mon Mar 10, 2014 4:18 pm ]
Post subject:  Re: 75w - 140 oil ok for diff?
Thats what minea like, if in up to speed and gently accelerate i hear the whine, i had the case off at the weekend and couldnt see any damage, i took some pics ill upload them when i get in
Author:  3rdGenmalc [Mon Mar 10, 2014 5:15 pm ]
Post subject:  Re: 75w - 140 oil ok for diff?
I´m afraid looking inside the diff. won´t tell you anything.
You´ll have to disassemble it and look at the bearings, even then you might not see the cause.
Author:  p3te [Mon Mar 10, 2014 8:40 pm ]
Post subject:  Re: 75w - 140 oil ok for diff?
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Author:  3rdGenmalc [Tue Mar 11, 2014 5:52 am ]
Post subject:  Re: 75w - 140 oil ok for diff?
For some reason I cannot view the pictures.
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