Friction modifier or no?
10-19-2009, 06:16 PM
#1
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Year: 1989
Model: Cherokee
Engine: 4.0L I6
Friction modifier or no?
Heh, chalk up another confused person due to a Haynes manual...
I'm getting ready to change the front and rear diff fluids, and it says to use 80W-90 (I think) for regular use in both diffs. A bit farther down however, it says you're supposed to use 2 oz. of friction modifier in the rear diff - all models. I didn't think you had to do that?
I'm getting ready to change the front and rear diff fluids, and it says to use 80W-90 (I think) for regular use in both diffs. A bit farther down however, it says you're supposed to use 2 oz. of friction modifier in the rear diff - all models. I didn't think you had to do that?
10-19-2009, 07:16 PM
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Year: 1998
Model: Cherokee
Engine: Inline 6
correct me if im wrong but ive only used friction modifier for limited slip differentials. i dont see why haynes would tell you to use it. IMHO i would say NO. stick with good old 80w90 gear oil.
10-19-2009, 07:20 PM
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Year: 1987
Model: Cherokee
Engine: 242 inline six
Heh, chalk up another confused person due to a Haynes manual...
I'm getting ready to change the front and rear diff fluids, and it says to use 80W-90 (I think) for regular use in both diffs. A bit farther down however, it says you're supposed to use 2 oz. of friction modifier in the rear diff - all models. I didn't think you had to do that?
I'm getting ready to change the front and rear diff fluids, and it says to use 80W-90 (I think) for regular use in both diffs. A bit farther down however, it says you're supposed to use 2 oz. of friction modifier in the rear diff - all models. I didn't think you had to do that?
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