Hi Gary,

I would suspect the Mitsu splines would be a closer match than the Mazda B4000 since the Mitsu is metric based and the Mazda is an inch based Ford rear end that came off of the Ranger assy. line with Mazda badges.

The Mitsu is listed at 28.8mm somewhere on one of the lists on the ARB site. If you scale the 26 spline Sportage axle up to 28 splines, the major diamiter would be about 28.8 if you keep the same spline pitch. It's also more likely that the pressure angle with the Mitsu splines is the same as KIA but not the same as Ford.

Ron Schroeder
Long Island NY
99 4DR auto Sportage, 30x950R15 tires, 3/4" strut spacer, rear air springs, Manual Hubs, FRONT Torsen LSD
00 Safari AWD, 2" lift, 30x9.50 tires, 4x4 conversion in progress
73 Pinzgauer Swiss Army troop carrier