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Discussion Starter #1 (Edited)
i think i remember seeing something bout using regular gear oil when you first place you new gears.........is that tru or can i go ahead and use redline gear oil....................i am changing my gears in my cougar from a 3.08 to a fresh 4.10......i need those 4.10 to move that 4700 lb car.......
 

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You want to use normal gear oil so you can see the ware marks on the gears to make sure there set up right. But man to tell you the truth if your not going to pull the case apart to check this like your supost to, just use the redline.
 
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