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Diffrential Oil change?

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Old Jun 27, 2005 | 08:30 PM
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Question Diffrential Oil change?

It says 37500 miles is the time to change your diffrential oil in manual. Did you guys change it? is it important? what kinda oil would u suggest? Do I need to know some tricks before I get under the car?
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Old Jun 27, 2005 | 08:44 PM
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I changed mine. It's worth it IMO. I used Red Line 75w90. You need to unbolt the diff cover to drain the fluid. Buy a new cover gasket and then bolt the cover back on. Pull out the plug on the side and fill up until oil starts coming out, about two quarts.
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Old Jun 27, 2005 | 09:03 PM
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Originally Posted by Ferocity02
I changed mine. It's worth it IMO. I used Red Line 75w90. You need to unbolt the diff cover to drain the fluid. Buy a new cover gasket and then bolt the cover back on. Pull out the plug on the side and fill up until oil starts coming out, about two quarts.
Thanx a lot man
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Old Jun 27, 2005 | 10:35 PM
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so what are other good gear oils to use. what weight is optimal to use. i know that the 75w90 is recommended. What is the other weight that is available for use and why is 75w90 recommended? also, i have a MAC differential cover. should i get rtv sealant when i go to put it on and use allen bolts? TIA
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Old Jun 28, 2005 | 08:24 AM
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Here's a relevant thread: Thread
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Old Jun 28, 2005 | 11:59 AM
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what else would i need to install my MAC differential cover???also, why is 75w90 gear oil the optimal choice as far as weights go?
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Old Jun 28, 2005 | 01:00 PM
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I change mine at least once a year with Valvoline 85 - 140 and 2 bottles of LSA from GM. I do have a Moser 12 bolt and race quite a bit.
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