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Sonnax 73840-RK Oversized Pressure Regulator & Converter Regulator Valve Kit

Sonnax 73840-RK Oversized Pressure Regulator & Converter Regulator Valve Kit

by Sonnax
SKU S96741CAK
Sold out
$59.25 - $59.25
$59.25
$59.25 - $59.25
$59.25
Availability:
Out of stock

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Manufacturer Part Number: 73840-rk

Brand: sonnax

CD4E, LA4A-EL

Oversized Pressure Regulator & Converter Regulator Valve Kit
Part No. 73840-RK

    Tooling:
  • F-73840-TL
  • VB-FIX
Ford CD4E and Mazda LA4A-EL transmissions frequently exhibit symptoms of lube failure, harsh shifts and line pressure instability. Wear of the pressure regulator balance circuit (opposite end from spring) creates high line pressure. High line pressure is known to break up parts, but also positions the valve to reduce the flow into converter/cooler circuits. If the vehicle goes into failsafe (no EPC control) the lube circuit can be shut off completely on the OE valve. The OE converter regulator valve shuts off cooler/converter flow at 90-100 psi.

Sonnax oversized pressure regulator and converter regulator valve kit 73840-RK featires a converter regulator valve and PR valve which work together to limit converter pressure, yet ensure flow continues during a failsafe condition.

  • Updated valves flow a safe regulated pressure into both the line and converter circuit, yet maintain control under low pump volume and high line conditions
  • Improved line-to-lube circuit allows full-time cooler flow
  • Includes an EPC pressure limit relief valve
  • Redesigned converter regulator valve has a lengthened spool to eliminate cooler pressure loss
  • Tapered spool design of the converter regulator valve ensures flow at extreme pressure
  • Hardcoat anodized aluminum valves combat premature wear and feature annular grooves to prevent side loading

This kit cannot address the loss of valve control at the converter bypass circuit. Wear at the bypass valve contributes to codes 628, 1740 and related converter slip codes. For information on that repair, see part number 73840-BK.

Reamer kit 73840-RTL is no longer in production but may be available from distributor inventory. F-73840-TL is available for use prior to installing 73840-RK.

  • Converter Regulator Valve
  • Lubrication Plugs (4) 1 extra
  • Converter Regulator Spring
  • Oversized Pressure Regulator Valve

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