Replacing some components on my 1996 300’s rear end. I bought a used but good condition rear axle to replace mine. The axle came off a 1990 300 FW. I cross referenced part numbers before I bought it and it had same part numbers for both years. Get it installed tonight and when I go to put my hubs on there is about 1 1/2" of less that is splined on the new axle. Anyone know if these axles were different for these years or what I missed?