Dodge Durango Differential Problem

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?

Mike:
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.