Hi yuennong,

So it sounds like the carrier, carrier bearings, the center hole in the ring gear and the bolt holes that hold the ring gear on are the same between both the front and the rear.

At least here in the US, the axle splines were the same both front and rear for the first few years that the Sportage was sold here. Sometime before 1999, the rear axles were changed to a larger 28 spline. My Sportage has the 28 spline rear axles.

What year Sportage did you put a rear differental into the front?

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