D44: 4.09, 4.56, 4.88, 5.13, Std THICK gears to fit 3.07-3.73 carrier / Master INSTALL KIT
FORD 9": 4.10, 4.56, 4.89, 5.14 / INSTALL KIT
4.56, 4.88, 5.13 D44 THICK REQUIRES 9/16" ring gear bolts (included) and drilling ring gear bolt holes on carrier to 9/16" dia