Sonnax Oversized Pressure Regulator Valve Kit for 6F50 6F55 6T70 6T75 Gen 1

Restore Line Pressure and Shift Quality

The Sonnax Oversized Pressure Regulator Valve Kit (124740-12K) is the direct drop-in solution for Ford 6F50, 6F55 and GM 6T70 (Gen. 1), 6T75 (Gen. 1) transmissions suffering from bore wear in the main pressure regulator valve.

Common symptoms this kit resolves include erratic line pressure, harsh or soft shifts, burnt clutches, low converter and lube flow, overheating, and TCC apply/release problems. The oversized hardcoat anodized valve with extended sealing land, matched spring, and end plug restores OE function and long-term durability.

• Restores proper line pressure control in all ranges for smooth shifting
• Addresses bore wear in the pressure regulator valve to prevent fluid loss
• Helps eliminate erratic line pressure, harsh or soft shifts, and transmission overheating
• Prevents burnt clutches, low converter and lube flow, and TCC apply or release concerns
• Includes oversized hardcoat anodized aluminum valve, matched spring, and end plug for lasting durability
• Drop-in upgrade for Ford 6F50, 6F55 and GM 6T70 (Gen. 1), 6T75 (Gen. 1) transmissions
• Requires bore reconditioning with Sonnax F-124740-TL12 tool kit (sold separately)

Kit Contents:

• Oversized hardcoat anodized aluminum pressure regulator valve
• Matched spring
• End plug

Note: Bore reconditioning with Sonnax F-124740-TL12 tool kit is required for installation.

Perfect for professional transmission rebuilders and DIY enthusiasts looking to eliminate common valve body wear issues in these popular 6-speed units.