Symptoms:

  • Shift concerns
  • Lockup concerns
  • Burnt clutches

Cause:

Wear of the end plugs allows valuable line pressure and SLT pressure to leak at the various valve bores.

Correction:

Sonnax drop-in O-ringed plug kit eliminates leakage at the bore plug.

U660E, U660F, U760E, U760F

O-Ringed End Plug Kit
Part No. 47740-21K

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

The end plugs at the various valves are designed to seal line pressure and SLT pressure that is critical in controlling component apply pressure during shifts at various throttle pressures. When this fluid pressure is allowed to leak due to plug wear, various shift complaints and burnt clutches occur within those specific circuits. Loss of pressure at the secondary regulator valve and lockup relay valve plugs also prevents proper control of the converter circuit, creating lockup complaints.

Sonnax O-ringed end plug kit 47740-21K restores correct circuit pressures in listed Toyota/Lexus units. The O-ring provides additional sealing to reduce hydraulic losses at critical circuits.

  • Minimal end plug-to-bore clearance with added O-ring for positive seal
  • Drop-in Zip Valve parts install quickly and easily
  • Small End Plugs (6)
  • Small O-Rings (9) 3 Extra
  • Large End Plug
  • Large O-Rings (2) 1 Extra

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/Lexus U660E/F, U760E/F Valve Body Layout

Toyota/Lexus U660E/F, U760E/F Valve Body Layout
  • U660E, U660F, U760E, U760F O-Ringed End Plug Kit 47740-21K
  • U660E, U660F, U760E, U760F O-Ringed End Plug Kit 47740-21K

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.

U660E, U660F, U760E, U760F O-Ringed End Plug Kit Vacuum Test Locations