Features/FAQs
Replacement O-ring for the Ford ZF transmission-mounted parking brake assembly. Replaces a worn or damaged O-ring to help prevent fluid leakage.
Fitment — matching ZF parking brake assembly required:
- 1987–1995 Ford F-250 / F-350: ZF S5-42
- 1995–1998 Ford F-250 / F-350: ZF S5-47
- 1999–2001 Ford F-250 / F-350 Super Duty: ZF S5-47M
Ford F-450: Matching assembly; exact year range requires verification.
OEM: Ford E7TZ-7288-B / E7TZ7288B; ZF 0634-313-136 / 0634313136. Interchange: AS7288B / AS72-88B. Please verify your ZF parking brake assembly, original part number and O-ring dimensions prior to purchase to ensure compatibility.
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