Symptoms:

  • Line pressure instability
  • Burnt clutches & bands
  • Low EPC pressure
  • Low line pressure

Cause:

Fluid leaking past OE pressure regulator end plug.

Correction:

Stop leaks from this area by installing Sonnax O-ringed end plug.

CD4E, LA4A-EL

O-Ringed End Plug Kit
Part No. 73840-06

Fits pressure regulator valve bore.

View Instructions Find a Distributor

Ford 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 plug with Sonnax O-ringed end plug 73840-06 provides a solid seal to halt TV/EPC pressure loss from this circuit.

Can be used with OE pressure regulator valve or with Sonnax oversized pressure regulator valve.

  • End Plug
  • O-Ring
  • CD4E, LA4A-EL O-Ringed End Plug Kit 73840-06
  • CD4E, LA4A-EL O-Ringed End Plug Kit 73840-06