The Muncie 21T37085 is a genuine Muncie Power Products thrust washer used as a service part in Muncie FA6B Series and FR66 Series power take-off units. It appears in the official Muncie service parts lists for both PTO families, covering clutch-shifted and solenoid-activated models designed for Allison and Aisin 6-bolt transmissions. Keeping the correct thrust washer in place is critical to maintaining proper gear alignment and bearing load management inside the PTO housing. This is an OEM-identified component sourced directly through Pro Gear and Transmission. Call us to confirm the correct fit for your specific PTO model and configuration.
Features
Genuine Muncie Power Products thrust washer, part number 21T37085
Listed in official Muncie service parts documentation for the FA6B Series PTO
Also referenced in FR66 Series service parts lists and service manual
Compatible with clutch-shifted PTO units designed for Allison and Aisin 6-bolt transmissions
Direct OEM replacement for PTO internal thrust load management
Sold by Pro Gear and Transmission
