Symptoms:

  • Soft Forward
  • Harsh Forward
  • Delayed Forward

Cause:

Accumulator bore wear and/or piston sticking.

Correction:

Prevent leakage of worn valve body castings with this O-ringed accumulator piston and spring kit.

CD4E, LA4A-EL

Forward Accumulator Piston Kit
Part No. 73840-FWD

You need this if... View Instructions Find a Distributor

CD4E transmissions may exhibit such problems as harsh engagements, and/or soft or harsh shifting, particularly from 1st to 2nd Gear. These complaints can be due to worn or out-of-round accumulator bores and/or pistons sticking in the bore. Sonnax accumulator piston kit 73840-24 for the 2-4 piston, 73840-LR for Low/Reverse and 73840-FWD for Forward.

  • Anodized aluminum pistons have two O-rings that prevent blow-by leakage
  • Pistons have been dimensionally modified to stop in different axial locations to prevent them from hanging up or sticking on the previously worn bore edges
  • Modified replacement springs are included to fit the smaller piston pocket
  • Kits available for 2-4, Low/Reverse and Forward locations
  • Piston
  • Spring Red
  • Spring Blue
  • O-Rings (2)
  • Rivet Not Shown
  • CD4E, LA4A-EL Forward Accumulator Piston Kit 73840-FWD
  • CD4E, LA4A-EL Forward Accumulator Piston Kit 73840-FWD

You need this if...

A vacuum test at either port indicated fails to hold 18" of vacuum or higher, or if visual wear is detected at the inboard overlap valve bores.

CD4E, LA4A-EL Forward Accumulator Piston Kit Vacuum Test Locations