I need some advice on a rear axle assembly for my 95 4wdr k1500 suburban. Code is GU6 3:42 gears and I'm having some difficulty finding one locally. I was wondering if I could convert a 2wdr 5 lug assembly to fit the 4wdr? Are the 5 lug shafts the same dimensions as the 6 lug? There are several 2wdr assembly's available with 3:42 gears but not sure if the splines, bearings and lengths are the same as in the 4wdr.