How To Change Rear Diff Fluid

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devadip

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I used Mobil 1 and added the Motorcraft friction modifiier. I aslo used a Felco gasket. The gasket was only $7 and I got rid of the wait time.
 

Russell Lewis

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so heres a question. i dont have a lsd. ive checked my book and the haynes manual. it says add friction modifier if i have the lsd. i dont. should i add it anyways? and my dad didnt buy the gasket. so i gotta go get it and an extra bottle of gear oil.

You answered it yourself. Friction modifier is for lsd ( helps clutches grab )yours is a open diff no need for one.
 

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