Reverse Clutch Piston for Ford 4F27E FNR5 2000-Up 1.475" XS4Z-7D402-AC

Replacement reverse clutch piston for applicable Ford 4F27E and FNR5 automatic transmissions. Features the specified 1.475-inch-long design for reverse clutch service during transmission repair or rebuilding.

Product Details:

• Component: Reverse clutch piston

• Transmission compatibility: Ford 4F27E and FNR5

• Application range: Applicable 2000-up transmissions; verify before ordering

• Specified length: 1.475 inches

• Reference part number: XS4Z-7D402-AC

• Interchange references: 138966A and 48966B

• Package contents: One reverse clutch piston

Repair Application:
Intended for replacement of a worn or damaged reverse clutch piston. Delayed reverse engagement, slipping in reverse, or no reverse require diagnosis; replacing this piston will not correct unrelated transmission faults.

Fitment Notice:
Match the original piston dimensions, transmission identification, and reverse drum configuration before purchase. A shorter 1.375-inch reverse clutch piston is also used in related transmission applications and should not be treated as interchangeable without checking the applicable specifications. Professional installation and reverse clutch clearance verification are recommended.

Fluid Service:
Use the vehicle manufacturer’s specified transmission fluid. Consider compatible Lubegard ATF products according to their application instructions. Fluid and additional rebuilding components are sold separately.