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Thread: Rear Gear Oil
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02-21-2006 #1
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- Jan 2006
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- Bend, OR
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Rear Gear Oil
I need to find out what gear oil to use for my new 9" rear. I'm planning on using 2.5 pints of GL-5 80/90w gear oil. If this is not the best stuff to use, please let me know. Any recommended brands? Also, should I use the Positrax additive, if so what does it really do? Thanks a lot.
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02-27-2006 #2
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- Dec 2002
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- Lost Wages, Nevada
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- 2,683
Does it ever get to freezing temperatures or will you ever drive it during those temperatures ?? If not, I like using a straight weight 140..... from Schaffer, Torco, LE or Amsoil.
If it is a friction type clutch pack, use a friction modifier (positrax). The old Ford friction modifier is still the best I have ever used, but they dont make it any more. Redline also has an excellent fric mod that you can get from a performance dealer.
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