Dodge Durango Forum II

Re: How to tell if i Have a 3.55 or 3.92 rear end?

My 2K 4.7 with 31" tires has big "3.55" lables on both front and rear axles. Also at 60 MPH I'm running ~1800RPM. I think the 4.7 4th gear is a different ratio than the 5.2/5.9, but I have yet to find the actual 4.7 tranny gear ratios to know for sure.

Thu Jun 29