Sonnax 56947-02K Boost Valve Kit for Transmissions

The Sonnax 56947-02K high ratio boost valve kit with O-rings replaces worn parts and offers higher line rise than the OE-style, low-ratio valve. This kit is specifically designed for Ford A4LD transmissions in 4.0L engine applications.

Key Features:

• Hardcoat anodized aluminum valve combats premature wear
• Sleeve manufactured from highly wear-resistant aluminum
• High ratio design provides superior line rise compared to OE valves
• Drop-in Zip Valve™ parts install quickly and easily
• Kit includes sleeve, valve, and 2 O-rings

Addresses Common A4LD Problems:

• Low line pressure in forward or Reverse
• Soft upshifts and delayed Reverse engagement
• Poor modulator control
• Cross-leaking or exhaust issues caused by worn boost sleeves

This high ratio boost valve kit is engineered to restore hydraulic integrity and improve transmission performance in Ford A4LD applications with 4.0L engines. The O-ring design provides enhanced sealing over factory-style valves without O-rings.