Fabco 756-0377 Retaining Ring/Washer – Heavy-Duty Drivetrain Fastener
The Fabco 756-0377 is a heavy-duty piston ring sized for a 4.000 in outer diameter, used in Fabco/Meritor auxiliary/transfer-case assemblies. It serves as a precision fit ring around a piston or cylindrical component inside the housing, ensuring proper clearance and sealing in demanding truck transmission applications.
Key Specifications
- Model Number: 756-0377
- Material: Hardened Spring Steel
- Function: Retention and alignment of internal drivetrain parts
- Installation: Fits into precision-machined grooves
- High vibration and corrosion resistance




