75w90 vs 85w140?
#1
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Ok, I have spent numerous hours conducting due diligence on the best grade of t-case and diff oil to use in Washington State. The only thing consistent is that everyone recommends either weights/grades. Perhaps we can just just have one thread on here that addresses just this. One thing I was thinking of doing was using the LR recommended grade of 75w90 on the diffs and using the 85w140 in the transfer case .... any thoughts on this ... what do you use and why? Thank you. With Respect, LT
#2
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When cold the viscosity of the 85/140 is 85, just as it should be and when hot it is 140 for the extra protection needed to protect our somewhat fragile spider gears.
That being said, disregard that reply and run only the higher viscosity gear oils be it dino or syntheic.
#5
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Thanks Disco, I trust anything you say. I'm going with the 85/140. Now I need to figure out what synthetic oil to use for Washington State, I think 10w30 was too light as new leaks starting popping up. Also, Is royal Purple the best brand for t-case and diff? Money is really not a factor. Thank you all!.
#6
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Thanks Disco, I trust anything you say. I'm going with the 85/140. Now I need to figure out what synthetic oil to use for Washington State, I think 10w30 was too light as new leaks starting popping up. Also, Is royal Purple the best brand for t-case and diff? Money is really not a factor. Thank you all!.
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#7
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Where the hell did you come up with that crock of S--- explanation and be very specific.
When cold the viscosity of the 85/140 is 85, just as it should be and when hot it is 140 for the extra protection needed to protect our somewhat fragile spider gears.
That being said, disregard that reply and run only the higher viscosity gear oils be it dino or syntheic.
When cold the viscosity of the 85/140 is 85, just as it should be and when hot it is 140 for the extra protection needed to protect our somewhat fragile spider gears.
That being said, disregard that reply and run only the higher viscosity gear oils be it dino or syntheic.
Clearly, you cant read, so my explanation of thermal dynamics would be completely lost on you.
Last edited by dgi 07; 06-19-2012 at 04:46 PM.
#8
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I'm still have to change out my diff and TC oil and thinking of getting this from Amazon. Redline 75w-90 in a 5 gallon for $72.91 delivered.