Product Description
Tooling Required
- 96206-TL2
4F50 AX4N AX4S AXOD AXODE Oversized Pressure Regulator Valve Kit | Late Style Valve Bodies
In Ford 4F50N, AX4N, AX4S and AXODE transmissions, main pressure valve regulates line by pushing the pump slide into a decrease or limiting position. The instability of the valve, combined with the slide return spring, causes pressure spikes in the decrease (PC) oil circuit of more than 500 psi. When the inboard end of the pressure regulator valve wears, the CBY or bypass oil cannot flow past the regulator valve. This causes delayed engagements and reduced converter fill and lube oil flow. In the 1998 and later AX4Ns, Ford changed the spool lengths on the pressure regulator valves at the converter/lube feed area. This change was to allow the converter circuit to be fed sooner. In the pre-1998 design, the converter/lube circuit is completely closed at high line pressure. Sonnax oversized pressure regulator valve kit 96206-10K mimics the later OE design to prevent converter/lube-related problems at high line pressure.
- Hardcoat anodized aluminum valve combats premature wear
- Modified spool lengths provide better converter/lube feed
- Two springs included to re-establish correct regulating pressures
Symptoms
- Erratic line pressure
- Delayed engagement
- Pump noise
- Pump rotor & cover damage
- Overheated converter
- Lube failures
Cause
The instability of the main pressure regulator valve, combined with the slide return spring, can cause extreme pressure spikes in the decrease (PC) oil circuit. When the inboard end of the pressure regulator valve wears, the CBY or bypass oil cannot flow past the regulator valve, causing delayed engagements and reduced converter fill and lube oil flow.
Correction
Sonnax oversized pressure regulator valve kit contains an oversized anodized valve with modified spool lengths which better regulates converter/lube flow and restores hydraulic integrity.
Contents
- Valve
- Regulating Spring Large
- Bumper Spring Small
