USA Standard Gear ZM435WT291-6A NP435 Input Bearing Retainer for Ford

The USA Standard Gear ZM435WT291-6A is a precision-engineered input bearing retainer designed for New Process NP435 4-speed manual transmissions found in Ford trucks and Broncos. This critical component houses the front input shaft bearing and ensures proper alignment and sealing of the transmission's front section.

Key Features:

• Direct replacement for Ford NP435 transmissions from 1965-1987
• Compatible with casting number 13559
• Features standard 4.848" bearing retainer diameter
• Designed for transmissions with tapered input bearing configuration
• Precision-machined for proper bearing preload and gasket sealing
• Fits Ford butterfly bellhousing pattern (8.5" x 6.25")
• Also compatible with 1966-1977 Ford Bronco NP435 conversions

The input bearing retainer is essential for maintaining proper input shaft support and preventing transmission oil leaks. USA Standard Gear manufactures this component using precision machining and rigorous testing to ensure it meets or exceeds OEM specifications. The retainer works with the bearing preload shim stack to achieve proper input shaft end play during transmission assembly or rebuild.

This retainer is specifically designed for Ford NP435 transmissions with the 10-spline, 1-1/16" diameter input shaft and tapered roller bearing configuration. It is not compatible with GM or Dodge NP435 variants, which use different bearing retainer dimensions.