2007 cummins 6.7 liter· Registered
Discussion Starter · #1 ·
what is up with that? I thought diff fluid was good for like atleast 50,000. I know the chevys use the same american axle rear differential. How often do they change theirs? BTW I was thinking of using amsoil and changing it every 30,000 unless their actually is a reason for changing it so often.