Symptoms:

  • 4-3 Neutral
  • Code 628
  • Delayed lockup
  • Forward clutch failure
  • Intermediate roller clutch failure
  • Low line rise
  • Low Reverse boost
  • Mechanical diode failure
  • No 4th
  • OD band failure
  • Poor shift quality
  • Soft shifts
  • TCC apply & release concerns

Cause:

Loss of oil pressure due to worn components in critical oil circuits and/or lube related failure.

Correction:

Recover hydraulic control, restore normal shift operation and restore clutch pressures by installing Sonnax Zip Kit.

4R70E, 4R70W, 4R75E, 4R75W, AODE

Zip Kit®
Part No. AODE-4R75E-ZIP

For AODE, fits '96-later only

View Instructions Find a Distributor

Sonnax kit SC-AODE-1 has been discontinued and replaced by Sonnax Zip Kit AODE-4R75E-ZIP.

Sonnax Zip Kit AODE-4R75E-ZIP targets the root cause of multiple concerns by sealing critical circuit pressure losses in the valve body. The kit contains uniquely-designed parts to prevent the loss of pressures within the main line, solenoid regulator, converter clutch and overdrive servo circuits. The kit also contains components to address forward and intermediate clutch failure, overdrive servo failure, soft shifts, intermediate roller clutch/mechanical diode failure, and low clutch apply pressure. No separate 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 quickly. 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 separate special tools required
  • Uniquely designed parts address root causes of valve body concerns by sealing critical pressure circuits
  • Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair
  • Input Shaft Seals (2)
  • Main Pressure Regulator Valve
  • Boost Valve Kit
  • Bypass Clutch Control Plunger Valve Kit
  • 2-3 Shift Valve O-Ringed End Plug
  • Solenoid Regulator Valve Retainer
  • Overdrive Servo Regulator Valve Kit
  • Checkballs (8)
  • Valve Body Retainer Plate Kit
  • Overdrive Servo Pin Kit
  • Pump Cover Seals (2) Early
  • Output Shaft Seals (2)
  • Intermediate Clutch Spiral Retaining Ring Kit
  • Pump Cover Seals (2) Late
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Zip Kit® AODE-4R75E-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