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Symptoms:

  • Burnt brake clutches
  • Burnt clutches
  • Delayed engagement
  • Inadequate lubrication
  • Low pressure
  • Slips & flares
  • Soft shifts
  • TCC apply & release concerns
  • TCC codes

Cause:

Loss of oil pressure due to worn components in critical oil circuits.

Correction:

Zip Kit seals critical pressure losses.

U660E, U660F

Zip Kit®
Part No. U660E-ZIP

See instructions for valve body identification guide.

View Instructions

Sonnax Zip Kit U660E-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the Toyota/Lexus U660E and U660F valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, clutch apply control and lockup control circuits. The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. No special tools are required for installing these parts.

The Zip Kit quick guide provides clear and easy instructions on one sheet to get the unit sealed up and back on the road fast. In addition to general rebuilding tips and technical information, the technical booklet included in this kit contains vacuum testing information and locations at other key areas of the valve body.

  • No reaming required
  • Installs quickly with no special tools required
  • Uniquely designed parts address root causes of valve body complaints by sealing critical pressure circuits
  • Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair
  • B1 Apply Boost Valve Kit
  • Reverse Boost Valve Kit
  • O-Ringed End Plug Kit
  • Solenoid Modulator Drill Bit .062" dia. (not shown)
  • Solenoid Modulator Orifice Plugs (2) (not shown)
  • Lockup Control Boost Valve Kit
  • C1 Accumulator Piston Kit
  • B1, B2, B3 & C2 Accumulator Piston Kit
  • Checkballs (3) Viton®
  • Case Connector O-Ring
  • Fluid Temperature Sensor O-Ring
  • Solenoid Modulator Valve, Sleeve, Selective Shims, Spring & 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 U660E/F, U760E/F Valve Body Layout

U660ef vbl thumb

December 09, 2013

Toyota/Lexus U660E, U660F, U760E, U760F Identification Guide

Topics: Identification Guides Transmission Toyota/Lexus U760F Transmission U660F Transmission U760E Transmission U660E Transmission

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December 30, 2013

Toyota/Lexus U660E/F Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission Toyota/Lexus U660F Transmission U660E Transmission

Read Now

July 15, 2014

Zip Kit® Video - The first step in correcting common shift problems.

Topics: Diagnostics And Theory Transmission

Watch Now
  • U660e zip
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The Sonnax ZIP KIT®

The First Step in Correcting Common Shift Problems

It's easy to restore and extend vehicle shift quality with Zip Kits. Uniquely designed Sonnax parts target the root cause of valve body complaints and stop critical circuit pressure losses in the most common problem areas of the transmission.

Learn More About Sonnax Zip Kits