Symptoms:
- Line pressure instability
- Burnt clutches & bands
- Low EPC pressure
- Low line pressure
Cause:
Fluid leaking past OE pressure regulator end plug.Correction:
Sonnax drop-in O-ringed plug kit eliminates leakage at the bore plug.CD4E, LA4A-EL
O-Ringed End Plug Kit
Part No. 73840-06
Fits pressure regulator valve bore.
View Instructions Find a DistributorFord CD4E and Mazda LA4A-EL transmissions often develop a leaky end plug at the pressure regulator bore causing line pressure instability, low EPC pressure and ultimately resulting in burnt clutches and bands. Replacing the OE end plug with Sonnax O-ringed end plug kit 73840-06 provides a solid seal to halt TV/EPC pressure loss from this circuit. Drop-in Zip Valve™ parts install quickly and easily.
Learn More About Zip Valve™ Drop-In RepairsCan be used with OE pressure regulator valve or with Sonnax oversized pressure regulator valve 73840-RK.
- End Plug
- O-Ring
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Ford CD4E Valve Body Layout
Related Sonnax Parts
Required
Recommended
CD4E, LA4A-EL
Master Kit 73840-MK
-
Helps cure:
- Code 28, 1744, 1740
- High line pressure
- Cracked drum
- Planetary failure
- Bushing failure
- Loss of lube oil
- No cooler flow during failsafe
Required
Recommended
CD4E, LA4A-EL
Oversized Pressure Regulator & Converter Regulator Valve Kit 73840-RK
-
Helps cure:
- Code 28, 1744, 1740
- High line pressure
- Cracked drum
- Planetary failure
- Bushing failure
- Loss of lube oil
- No cooler flow during failsafe