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Discussion Starter #1
I was checking under the truck this morning, and discovered that the pinion seal was leaking. I checked the fluid level and it needs to be topped off. The Ford parts are closed until Tuesday, because of Labor Day and I need to drive back home Monday. I will need to buy after market lube at Kragen or O’relliey and want to know what to look for. It is a limited slip diff so I can’t just put the old 90wt in it. I sometimes don't trust the person behind the counter giving the right info. Thanks
 

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Senior Member
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326 Posts
I believe the rear end uses 75W140 synthetic.
 
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