Required tool kit 56833-TL is no longer in production. Check with your distributor for availability.
In Ford A4LD and C3 units, the continuous oscillation of the modulator valve wears the case bore, allowing oil circuit leakage. Line pressure and modulated TV pressure can cross leak or go to exhaust, resulting in uncontrollable shift timing, delayed egagements, harsh or slide shifts, poor line rise, and/or no TV control. Sonnax offers an oversized modulator valve kit 56833-01K that restores thehydraulic integrity of the circuits. Reamer kit 56833-TL must be used to accommodate the oversized valve.
A modulator with an adjustment screw must be used with this oversized valve.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.