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. Drop-in parts install quickly and easily.
TD_Top_10_Products
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Zip Kit® AODE-4R75E-ZIP

Videos

Zip Kit® Video - The First Step in Correcting Common Shift Problems
 
Sonnax Zip Kit

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, drop-in 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