I bought a replacement 30 front axle for my '77 CJ-7 and it never dawned on me to check this, but it came off of an automatic transmission and I have a manual 3 speed (probably T-150). Are there any size differences or offsets for the automatic? I know I need to switch my Warn locking hubs over. What about the rear 20 axle off of the same automatic transmission? Is the standard gear ratio on a '79 automatic different from a '77 manual, or do I need to go spin the tires and count the rev's on the input shaft?