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Discussion Starter · #1 ·
I have a 15.5 RD and just curious what sort of intervals people are doing for driveline services like the rear diff fluid, etc..? I'm just over 60K mileage wise and was going to have a trans service done, but not sure if there is anything else I should plan for.

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At 60k I would recommend at least doing trans fluid and AOC fluid service. Wouldn't hurt to do front angle gear and rear diff as well.

I did all of the above at 45k miles, shortly after taking ownership. Trans fluid was noticeably burnt, and shifting is a little smoother after service. AOC fluid was not terrible, but definitely had some particulate in it. Front and rear gear oils didn't seem all that bad. Knowing what I learned from that service I will continue to do trans and AOC at ~30k mile intervals, gear oils at ~60k miles.

You could not change the trans fluid, ever, and I guarantee it will last the lifetime of the transmission... it will just be a relatively short lifetime.
 
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