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which axle do I have.

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Old 01-26-2011, 09:16 AM
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which axle do I have.

Guys,

Not near my truck to find out for myself but which axles should I have in a 1991.5 D250 with a518 tranny (4speed OD).


also which wieght gear oil does the rear axle require 75-90?
Old 01-26-2011, 09:36 AM
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Dana 70 rear.

I am not positive but i think for towing applications you run 75w140. If you don't tow you can get away with 80w90. You may need a few oz's of friction modifier if you have a limited slip differential.
Old 01-26-2011, 10:51 AM
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I dont know if I have limited slip or not.
Old 01-26-2011, 11:18 AM
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It will say on the white sticker on the underside front edge of the hood.....

Or it says LS right on the tag which is on the rear differential cover.
Old 01-26-2011, 11:19 AM
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Yeah, Im in afghanistan, my truck is in Texas. I cant pop the hood and check.
Old 01-26-2011, 12:45 PM
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Originally Posted by zack_76401
Yeah, Im in afghanistan, my truck is in Texas. I cant pop the hood and check.
If i were to guess I'd say Dana 70, open traction type, 3.54 gears which from what i have seen is the most common version.
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