Symptoms:

Soft Forward
Harsh Forward
Delayed Forward

Cause:

Accumulator bore wear and/or piston sticking.

Correction:

Prevent leakage of worn valve body castings with Sonnax drop-in 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

Ford CD4E and Mazda LA4A-EL transmissions may exhibit such problems as harsh engagements, and/or soft or harsh shifting, particularly from 1^stto 2^ndGear. These complaints can be due to worn or out-of-round accumulator bores and/or pistons sticking in the bore. Sonnax accumulator piston kit73840-242 - 4活塞,73840-LRfor 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
Drop-in Zip Valve^™parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

Contents

Piston
SpringRed
SpringBlue
O-Rings (2)
RivetNot Shown

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