Compression Ignition Addict
Join Date: Jul 2007
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Is it normal for the super duty rear differential to get louder as the miles accumulate? My 06 just rolled over 42k, and the diff seems to be making more noise. I can hear a whine from it at lower speeds. It's really noticeable on the country roads near my house at 25-35 MPH. I've always been able to hear it every once in a while when it was cold, but it just seems to be getting worse.
Would changing the fluid to something like Royal Purple synthetic help? My 95 F-150 has 180k on it, and the diff is completely silent. I just hope my diff isn't going out at only 42k.
2006 F-250 Powerstroke Crew Cab Lariat Long Bed 4x4 FX4
SCT Xcal2 with Xtreme tunes by Innovative
Banks Monster Exhaust/Quadzilla Commander
ARP Head Studs and Elite Sneaky Pipe (Thanks Scuffy)