Chevy and GMC Duramax Diesel Forum - View Single Post - Noisy differential after fluid change?
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post #1 of (permalink) Old 04-12-2019, 10:31 AM Thread Starter
Junior Member
Join Date: Feb 2016
Location: Illinois
Posts: 45
Noisy differential after fluid change?

I replaced my differential fluid with Valvoline full synthetic oil and now my differential is noisy. It drives me nuts.
Should I just put AC Delco gear oil back in?
What oil are you using?

2015.5 GMC 3500 dually.
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