Symptoms:

  • Various concerns depending on location of leaking end plug
  • Pressure loss

Cause:

Worn, eroded end plugs allow loss of critical hydraulic pressure.

Correction:

Sonnax drop-in O-ringed end plugs restore correct circuit pressures. The O-ring provides additional sealing to reduce hydraulic losses at critical circuits.

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

O-Ringed End Plug Kit
Part No. 147741-30K

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

The primary design function of the OE end plug in listed Toyota/Lexus units is to prevent critical pressure loss by capping the bore. OE end plugs rely entirely on small clearances between the end plug and bore to confine hydraulic fluid under fluctuating pressure. End plugs are often tasked with a secondary role functioning as a spring stop or valve stop.

The repetitious and varying actions of fluid pressure, spring motion and valve impact cause wear at the end plug and bore mating surface and can distort the shape of the end plug. High pressure fluid leaking through the clearance gap can, with time, erode the surface material of both end plug and bore. Eventually the cumulative loss of hydraulic integrity leads to low pressure in critical circuits. Complaints vary depending on the location of the worn end plug but are always related to pressure losses.

Sonnax O-ringed end plug kit 147741-30K replaces worn, distorted or eroded end plugs in Toyota/Lexus A760, A960 and AB60 series units. The Sonnax end plugs have small clearances to mechanically block the bore and increase effectiveness. The O-ring seal reduces leakage further by blocking off worn areas of the bore which the new end plug alone could not seal.

  • Minimal end plug-to-bore clearance with added O-ring for positive seal
  • Drop-in Zip Valve parts install quickly and easily
I.D. Valve Name End Plug Dia. Installed Seal Position O-Ring Size
Lower Body No. 1
A 4-5 Shift 11mm Outboard Medium
B Inboard of SR Solenoid 12mm Outboard Medium
Lower Body No. 2
C B1 Apply Relay 9mm Inboard Small
D SL1 Relay 11mm Inboard Medium
E Brake Control 12mm Inboard Medium
Upper Body No. 1
F Lock-Up Relay 11mm Inboard Medium
G 1-2 Shift 11mm Outboard Medium
H 2-3 Shift 11mm Outboard Medium
I 3-4 Shift 11mm Outboard Medium
J Reverse Sequence 11mm Outboard Medium
K Clutch Control 12mm Outboard Medium
L Clutch Apply Relay 11mm Outboard Medium
M Secondary Regulator 14mm Outboard Large
Upper Body No. 2
N C3 Apply Relay 11mm Outboard Medium
Learn More About Zip Valve™ Drop-In Repairs
  • End Plug, 9mm
  • O-Rings, Small (2) 1 Extra
  • End Plugs, 11mm (9)
  • End Plug, 14mm
  • O-Rings, Large (2) 1 Extra
  • End Plugs, 12mm (3)
  • O-Rings, Medium (19) 7 Extra
  • Installation Screw (Not Shown)

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
  • A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F O-Ringed End Plug Kit 147741-30K
  • A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F O-Ringed End Plug Kit 147741-30K

You need this if...

Vacuum testing at the retainer pin cavity fails to hold the recommended minimum in-Hg or if end plugs are loose to the touch.