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So I did front and rear diffs and transfer case oil change yesterday, also cleaned throttle body and MAF sensor. The front and rear diffs were brown mud, by the looks of it I am guessing original. The truck has 128,000 on it. Replaced with Royal Purple 75/90. Both plugs looked like this Diff fluid
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Thats good to hear! I rubbed some of the oil between my fingers, didnt feel gritty so hopefully good for a while. I will do another flush next motor oil change. Saw some mobil 1 75/90 next to royal purple. Anyone use that?
Here are some pics of throttle body before and after. Before After
Originally Posted by djkronik57
Might be brown, but at least it isn't too glittery! The swarf on the plug is minimal. Seems like your diffs are OK.
Might be brown, but at least it isn't too glittery! The swarf on the plug is minimal. Seems like your diffs are OK.
Thats good to hear! Didn't feel gritty either. Hopefully I am good for a while. Will do another flush with next motor oil change. I changed out the breather cap too