Symptoms:
- Harsh shifts
- Uncontrollable shift timing
- Slide shifts
- Delayed engagement
- No TV control
- Low line rise
- Worn cases
Cause:
The continuous oscillation of the modulator valve wears the case bore, allowing oil circuit leakage.Correction:
Sonnax oversized modulator valve kit re-establishes the integrity of the circuit, preventing oil circuit leakage.Warning:
Required tool kit 56833-TL is no longer in production. Check with your distributor for availability.
A4LD, C3
Oversized Modulator Valve Kit
Part No. 56833-01K
-
Tooling:
- 56833-TL
You need this if... View Instructions Find a Distributor
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.
- Hardcoat anodized aluminum valve combats premature wear
- A longer modulator adjustment screw is included to properly preload the modulator spring and compensate for the oversized valve
A modulator with an adjustment screw must be used with this oversized valve.
- Valve
- Adjustment Screw
You need this if...
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.
