sonnax-black Facebook-color LinkedIn-color maillink printlink r_and_r_only SERVOFIX-logo-web Twitter-color VBFIX-logo-web video-logo-web warranty_only Youtube-color


  • Burnt converter
  • Burnt brake clutches
  • Burnt clutches
  • Low line rise
  • Soft shifts
  • Harsh shifts
  • Slips, flares & bind-ups
  • Delayed Forward
  • TCC apply & release concerns
  • TCC codes


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


Zip Kit seals critical pressure losses and restores and extends accumulator action.

U151E, U151F, U250E

Zip Kit®
Part No. U151E-U250E-ZIP

View Instructions

Sonnax Zip Kit U151E-U250E-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the Toyota U151E/F and U250E valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, B2 and B1 control, solenoid modulator and lockup control circuits. The kit also seals multiple circuits known to suffer from end plug leakage or poor check ball 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 and additional repair options for higher mileage units or for repairing specific complaints which are beyond the scope of this kit.

  • 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
  • Checkballs (11) Plastic
  • Lockup Control Plunger Valve Kit
  • Accumulator Piston Kit
  • O-Ringed End Plug Kit
  • B1 Apply Control Plunger Kit
  • Boost Valve Kit
  • B2 Apply Control Plunger Kit

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 U151E/F, U250E Valve Body Layout

Toyota u151ef  u250e

January 21, 2013

Toyota U151E/F, U250E Vacuum Test Guide

Topics: Vacuum Testing Vacuum Test Guides Transmission Toyota/Lexus U250E Transmission U151F Transmission U151E Transmission

Read Now

July 15, 2014

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

Topics: Diagnostics And Theory Transmission

Watch Now
  • U151e u250e zip

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