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Symptoms:
  • Burnt bands
  • Pin bore wear
  • Rear servo piston sticking/breakage
Cause:

Piston cocking in bore and pin bore wear inhibits band apply.

Correction:

Restore normal servo operation by installing Sonnax rear servo piston.

47RE, 48RE

Rear Servo Piston

Part No.

22912C

OE Part No: 52118745

Rear Servo Piston
  • Rear Servo Piston

  • 2291b_c_id

Small_22912c Small_2291b_c_id

47RE, 48RE

Rear Servo Piston

Part No. 22912C

OE Part No: 52118745

Fits '97-later units. Verify OE piston by referring to image shown here.

Complaint:

  • Burnt bands
  • Pin bore wear
  • Rear servo piston sticking/breakage

Cause:

Piston cocking in bore and pin bore wear inhibits band apply.


Correction:

Restore normal servo operation by installing Sonnax rear servo piston.

The rear servo piston in Chrysler 47RE and 48RE '97-later units can get wedged in the bore, causing bind in Reverse. Intermittent binding leads to bore wear and band damage. The improved design and material of Sonnax rear servo piston 22912C eliminates these concerns for consistent rear band apply.

  • Modified seal ridges prevent piston from sticking in case bore
  • Billet aluminum won’t crack like OE cast piston
  • 2.460" O.D. piston

Related Parts

Contact a Sonnax Distributor to purchase this part.