Differential Pinion Bearing Cup Rear Mustang 6-Cylinder 31-Spline 7.25" Ring Gear 1964-1970/ 9" Ring Gear 1967-1973

CJ's Part Number:
HM89410

Rear 6-Cylinder 31-Spline Differential Pinion Bearing Cup for 1964, 1965, 1966, 1967, 1968, 1969 and 1970 Mustangs with 7.25" Ring Gear and 1967, 1968, 1969, 1970, 1971, 1972 and 1973 Mustangs with 9" Ring Gear.

CJ Pony Parts offers the Rear 6-Cylinder 31-Spline Differential Pinion Bearing Cup for specific 1964-1970 Mustang and 1967-1973 Mustang applications. The ring gear for 1964-1970 Mustangs is 7.25 inches and for 1967-1973, 9" inches. Please see the following chart for inner and outer applications.

Ring Gear Applications:
1964-1970 Mustangs with 7.25" Ring Gear 
- Inner: HM89446A, HM89410
- Outer: M86649, M8660
1967-1973 Mustang with 9" Ring Gear
- Inner: M88048, M88010
- Outer: M88048, M88010
1967-1973 Mustangs with 9" HD Ring Gear
- Inner: HM89443, HM89410
- Outer: M88048, M88010

California Residents: Proposition 65 Warning

Vehicle Fitment

This product will fit the following Mustang years:

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