Looking for an alulinum transfer case tail shaft houseing for a 86 GMC 3/4 ton pick up 4X4; Number on case is C 15085. 10" tall. 1 7/8" rear seal dia. 7 7/8" front dia. (mounts to case) speedometer mounting 3 o'clock viewed for rear, 4 mounting holes to case a... Login to read more.