Steel Lock Ring

The Mark Williams Steel Lock Ring (MWE40836) is a two-piece coupler lock ring engineered for quick-disconnect Powerglide transmission applications. This black oxide steel ring secures the torque converter to the transmission case with precision fit and reliable clamping force, preventing accidental separation during high-load operation. Designed as a replacement component for transmission builders, performance shops, and restoration professionals working with Powerglide-equipped vehicles.

The two-piece design allows straightforward installation and removal without full transmission disassembly, reducing labor time during maintenance or component replacement. Black oxide coating provides corrosion resistance in engine bay environments while maintaining the structural integrity required for torque transfer. At 0.65 lbs with compact overall dimensions (4.1 x 1.75 x 6.15 inches), this lock ring meets OEM specifications for proper alignment and hold-down pressure on the converter hub.

This component is essential for anyone rebuilding or maintaining Powerglide transmissions, whether in street rods, muscle cars, tow vehicles, or racing applications. Proper lock ring engagement prevents converter stall issues, driveline vibration, and catastrophic transmission failure. The Mark Williams name carries reputation within the transmission aftermarket for precision manufacturing and quality control.

Powerglide transmissions remain popular in classic and high-performance builds due to their simplicity and reliability. The lock ring is a critical wear item that should be inspected during any transmission service and replaced if damaged, stripped, or worn. Sourcing correct OEM-specification components ensures transmission longevity and eliminates compatibility issues.