Symptoms:

  • Burnt clutches
  • Harsh shifts
  • Flare shifts
  • Shift concerns

Cause:

Worn components allow critical EPC or regulated pressure to cross leak to adjacent hydraulic circuits or to exhaust uncontrollably to the sump. This misapplication or loss of pressurized fluid wreaks havoc with the delicate balance of forces which position the brake control valve for optimal shift timing.

Correction:

This Sonnax kit eliminates cross leaks caused by wear and retains hydraulic pressure in the critical circuits while pressure loss to the sump is eliminated. Pressure exhaust to the sump is restricted and controlled at the OE V-notch.

A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F

Oversized Brake Control Valve Kit
Part No. 147741-28K


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

When Toyota/Lexus A750, A760, A960 and AB60 series units suffer shift issues such as harsh shifts, flare on shift and burnt bands, the brake control valve or bore may be worn out. Worn components allow critical pressurized fluid to cross leak into adjacent hydraulic circuits or to exhaust uncontrollably to the sump. The Sonnax oversized brake control valve kit 147741-28K restores OE functionality by eliminating cross leaks between hydraulic circuits and uncontrolled pressure losses to the sump.

  • Restores OE brake control valve function
  • Hard-coat anodized aluminum resists wear
  • Valve
  • End Plug

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.

Toyota A760E/F/H Series Valve Body Layout

Toyota A760E/F/H Series Valve Body Layout

Toyota A750E/F Series Valve Body Layout

Toyota A750E/F Series Valve Body Layout
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Brake Control Valve Kit 147741-28K
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Brake Control Valve Kit 147741-28K

You need this if...

A vacuum test at ports indicated fails to hold a minimum of 14 in-Hg of vacuum, or if visual wear is detected.

A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Brake Control Valve Kit Vacuum Test Locations