Rear Main Shaft Bearing For Muncie M20 M21 M22 4-Speed 1963-Up

Rear Main Shaft Bearing For Muncie M20 M21 M22 4-Speed 1963-Up

Replace the rear main shaft/output shaft bearing in compatible Muncie 4-speed manual transmissions with this 6308-N style bearing. Designed for Muncie M20, M21, and M22 applications from 1963-up.

Fitment

• Fits Muncie M20 4-speed manual transmissions, 1963-up

• Fits Muncie M21 4-speed manual transmissions, 1963-up

• Fits Muncie M22 4-speed manual transmissions, 1963-up

Bearing Specifications

• OEM/Reference Part Number: 6308-N

• Inside Diameter: 40 mm

• Outside Diameter: 90 mm

• Width: 23 mm

• Location: Rear main shaft / output shaft

• Bearing Style: Open ball bearing with snap-ring groove configuration

Why Replace It
A worn rear main shaft bearing may contribute to bearing noise, rough operation, or excessive play identified during transmission inspection. Replace this bearing during a rebuild, mainshaft repair, or geartrain service for a more complete repair.

Important Fitment Note
Verify transmission model, bearing dimensions, and original bearing configuration before ordering. This listing is for one rear main shaft bearing only; no gasket, seal, or additional rebuild components are included. For applicable fluid-maintenance needs, consider Lubegard ATF; always use the lubricant specified for the vehicle and transmission application.