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rear gear oil

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Old 02-04-2010, 07:18 AM
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Default rear gear oil

Hello Everyone,

This weekend I want to change the rear gear oil in my 93. Do I need gear oil with or without additive? I thought I read somewhere that if I used the royal purple (with additive) that I would be fine. I'm guessing using the additive(pre mixed in royal purple) can't hurt.
Old 02-04-2010, 08:27 AM
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If you have the factory limited slip, you have to add the additive. However, I believe if you use synthetic, I've heard you don't need to put in the additive. If you don't have the trakloc factory limited slip, you don't need any additive.
Old 02-05-2010, 06:50 AM
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I decided that I should just go full synthetic and put 75W140 in the rear.
Old 02-05-2010, 10:32 AM
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Originally Posted by jstantherprsn
I decided that I should just go full synthetic and put 75W140 in the rear.
Let me know how that works i am about to do mine.
Old 02-05-2010, 10:41 AM
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I used Lucas synthetic. No need for additives. Good stuff, highly reccomend Lucas products. I run it in everything.
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