Typical problems in vehicles with a Ford A4LD transmission include low line pressure in forward or Reverse, soft upshifts, delayed Reverse and poor modulator control. These complaints can often be caused by a worn boost sleeve, which allows Reverse and/or TV pressure to cross-leak or exhaust. Sonnax high ratio boost valve kit 56947-02K with O-rings replaces worn parts and offers higher line rise than the OE-style, low-ratio valve.



56947-02K
56947-05K

Ratio
High
Low


Ø A
.388"
.323"

Ø B
.571"
.571"

Ø C
.634"
.606"

Engine
4.0L
2.3, 2.8, 2.9, 3.0L


High-ratio valve with O-rings offers higher line rise than the OE valve
Hardcoat anodized aluminum valve combats premature wear
Sleeve manufactured from highly wear-resistant aluminum
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

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