I've been driving the car for four years now. No noise or any problems with the 3.23 gears.
Are they in production? I don't see them on Dr Diff's site.
Kevin
Have you thought of changing the rear tires to a taller set like 6 or more inches in circumference (2 to 4 inches taller)? If not, maybe you look into that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)