Transmission Parts Ford Mazda 4F27E FNR5 FS5A-EL FN4A-EL Valve Body Valve / Sleeve

Symptoms:

Clutch & band failures
Loss of lube oil
Low line pressure
High line pressure
Soft shifts
Harsh shifts
Low converter pressure

Cause:

Continuous oscillation of pressure regulator valve results in excess bore wear, causing erratic line pressure and/or restricting converter feed oil.

Correction:

Recover hydraulic control and renew line pressure performance by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.

Warning:

Follow the OE recommended torque sequence and amounts to prevent sticking of the pressure regulator valve.

4F27E, FN4A-EL, FNR5, FS5A-EL

Oversized Pressure Regulator Valve Kit
Part No. 46892-01K

Tooling:

F-46892-TL
VB-FIX

You need this if... View Instructions Find a Distributor

Ford/Mazda 4F27E, FN4A-EL, FNR5 and FS5A-EL units may exhibit multiple line pressure and converter-related problems due to excess wear in the pressure regulator bore. Wear at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter/lube flow. Wear at the outboard spool area robs converter feed pressure and lowers line pressure, causing soft shifts and burnt clutches and bands.

Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 46892-01K restores hydraulic integrity for proper line pressure control in all ranges. The hardcoat anodized aluminum valve combats premature wear

Contents