Machining Required

Printpartsummary
Symptoms:
  • Delayed Forward clutch
  • Forward clutch failure
  • Rear servo bore wear
  • Reverse band failure
Cause:

Heavy scoring at the case bore for the inner piston seal allows drive oil loss, which can cause forward clutch and/or reverse band failure.

Correction:

The reverse servo sleeve kit restores the function of the reverse piston and salvages the case.

Machining Required

4R44E, 4R55E, 5R44E, 5R55E, A4LD, C3

Reverse Servo Sleeve Kit

Part No.

56532-01K

Reverse Servo Sleeve Kit
  • 56532-01k_combo

  • Reverse Servo Sleeve Kit

Small_56532-01k_combo Small_56532-01k

4R44E, 4R55E, 5R44E, 5R55E, A4LD, C3

Reverse Servo Sleeve Kit

Part No. 56532-01K

  • Sleeve
  • Back-up Ring
  • O-Ring

Complaint:

  • Delayed Forward clutch
  • Forward clutch failure
  • Rear servo bore wear
  • Reverse band failure

Cause:

Heavy scoring at the case bore for the inner piston seal allows drive oil loss, which can cause forward clutch and/or reverse band failure.


Correction:

The reverse servo sleeve kit restores the function of the reverse piston and salvages the case.

The reverse servo bore on the A4LD case can become scored due to repeated oscillation of the reverse servo piston within the bore during normal operation. Once this bore is damaged, the case must be scrapped. Install the Sonnax A4LD Reverse Servo Sleeve Kit 56532-01K to refurbish the case bore.

  • Kit contains a steel sleeve, O-ring and a back-up ring.
  • Instructions are included for machining the servo piston assembly by simply turning the smaller piston journal 1/16" smaller.

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Contact a Sonnax Distributor to purchase this part.