Machining Required

Printpartsummary
Symptoms:
  • Loss of lubrication oil to planetaries
  • Reverse drum, retainer & planet failure
Cause:

Excessive clearance between the overdrive piston retainer and intermediate shaft reduces lube flow to the gear train.

Correction:

Seal compensates for variations in case I.D. Oil is delivered to maximum load points on shaft. Optional oversized reverse drum journal allows salvage of reverse drum.

Machining Required

42RE, 42RH

Oversized Piston Retainer Kit

Part No.

12962N-02K

Oversized Piston Retainer Kit
  • 12962n-02k_combo

  • 12962n-02k_alt

  • Oversized Piston Retainer Kit

Small_12962n-02k_combo Small_12962n-02k_alt Small_12962n-02k

42RE, 42RH

Oversized Piston Retainer Kit

Part No. 12962N-02K

  • Piston Retainer
  • O-Ring
  • Plugs (2)

Upgraded sealing ring & oil flow

Complaint:

  • Loss of lubrication oil to planetaries
  • Reverse drum, retainer & planet failure

Cause:

Excessive clearance between the overdrive piston retainer and intermediate shaft reduces lube flow to the gear train.


Correction:

Seal compensates for variations in case I.D. Oil is delivered to maximum load points on shaft. Optional oversized reverse drum journal allows salvage of reverse drum.

Sonnax is now offering an upgraded standard replacement 12962N-01K and an oversized 12962N-02K piston retainer to allow rebuilders to salvage the expensive reverse drum. The oversized piston retainer requires only turning the I.D. of the drum using a lathe and then installing as normal.

  • Can be used in hydraulic or electonicly governed units
  • O-ring prevents loss of lube oil. Many OE supports do not seal well in this area.
  • Two O.D. oil delivery grooves have been repositioned at high load areas.
  • Two I.D. oil delivery grooves run full length of load-bearing surface.
  • Band drum diameter (standard and oversized) allows drum I.D. to be turned.
  • High-quality aluminum resists gauling.
NOTE:

Allows damaged reverse drum to be machined and salvaged.

  • Patent No. 6,810,771

Related Parts

Click here to view PDF if instructions do not appear below.

It appears you don't have a PDF plugin for this browser. Click here to view the PDF file.

Contact a Sonnax Distributor to purchase this part.