Sonnax 37947-05K Pressure Regulator Valve Sleeve Kit

The Sonnax 37947-05K pressure regulator valve sleeve kit is designed for use with worn valve body bores in Ford 4R44E, 4R55E, 5R44E, and 5R55E transmissions. Debris and constant oscillation of the pressure regulator valve can create casting bore wear and scratches on critical valve spools, allowing valuable line pressure to exhaust and diminishing converter apply pressure. This can result in incorrect line pressure, delayed engagements, converter issues, and overheating.

Key Features:

• Used in conjunction with Sonnax pressure regulator valve 37947-54 for worn bores with significant scratches
• Requires reaming for proper installation
• Helps cure delayed engagement, poor shift quality, low or high line pressure, overheating, and low cooler flow at idle
• Compatible with Sonnax tool kit 37947-TL5 (also works with 37947-07K TCC modulator sleeve kit)
• Restores hydraulic integrity to excessively worn valve body bores

This sleeve kit allows the valve bore to be oversized and properly restored, ensuring optimal hydraulic function when paired with a Sonnax replacement valve. Professional installation with specialized tooling is required for proper bore preparation and sleeve installation.