Janice writes: I have a 2005 Dodge Durango with 92k miles. We must have gotten into high water a couple of months ago because we found water in the differential fluid when we changed it. It seems ok now, but how often should we change that fluid?
Janice, If it were me, I’d change the differential fluid every 2 years or 30k miles, It’s not expensive, and it’s a great insurance policy against spending $1800 for repairs. Also, since there was water in the fluid, you had better have the transmission fluid and wheel bearings checked while you are there.