Have the rear axle out of my 00 for 4.10 gears. Noticed that the tag bolted to the cover says to use 75-140 synthetic oil. Took a look at the owners manual supplement that came with the truck and that says 80-90 synthetic. So which is it? I have the limited slip additive, just need the oil.
Thanks Brian

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99 red lightning, bassani complete system #1610 of 4000
2001 arctic cat zr440 snopro on the way
2000 super duty v10
Arctic cat 400 4x4
Cobra "R" #131 of 300
Moderator
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My vehicles http://www.zing.com/album/?id=4293160925

 

Hey 2000R, I went through the same thing you have with the lightning supplement. do not go by that it was printed before the lightning went into production and was never changed. Jim D'amore of JDM engineering told me the fluid that is on the axle tag is what to use. 75-140 weight. it is synthetic and costs around 14 bucks a quart. hope this helps. 95rcobra.

 

Thanks 95R
Brian

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99 red lightning, bassani complete system #1610 of 4000
2001 arctic cat zr440 snopro on the way
2000 super duty v10
Arctic cat 400 4x4
Cobra "R" #131 of 300
Moderator
www.svtperformance.com
My vehicles http://www.zing.com/album/?id=4293160925