• Low solenoid feed pressure
  • Delayed engagement


Worn out OE boost valve/sleeve assemblies can allow cross-leakage of critical fluid pressure to adjacent oil circuits or to the sump. Low hydraulic circuit pressures will adversely affect shift timing and feel.


Eliminate hydraulic dysfunction traced to worn OE boost valve/sleeve assemblies by replacing worn out parts with this Sonnax reverse brake pressure control valve kit.


Reverse Brake Pressure Control Valve Kit
Part No. 63741-29K

Fits '09-later units only.

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

This valve kit addresses low solenoid feed pressure and delayed Forward/Reverse engagement issues attributed to a worn out OE boost valve/sleeve assembly in the reverse brake pressure control valve bore of '09-later Jatco/Nissan RE05R05A transmissions. Installing Sonnax reverse brake pressure control valve kit 63741-29K can eliminate the symptoms by re-establishing proper hydraulic fluid pressure control.

  • Sleeve is manufactured from highly wear-resistant aluminum alloy
  • Hardcoat anodized aluminum valve combats premature wear
  • Valve
  • Sleeve
  • 63741 29k combo
  • 63741 29k

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

  • 63741 29k in test