Symptoms:

  • Shudder
  • Code 628
  • No lockup
  • TCC apply & release concerns
  • Delayed lockup

Cause:

Excess wear of the OE plunger valve/sleeve assembly allows regulated converter charge oil to leak to exhaust.

Correction:

Restore proper hydraulic control and renew converter charge pressure and timing by replacing worn OE parts with a Sonnax drop-in bypass clutch control plunger valve kit with OE feed orifice design.

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

Bypass Clutch Control Plunger Valve Kit
Part No. 76948-64K

Four .063" orifices to match OE sleeve design.

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

Common complaints with listed Ford transmissions include delayed lockup, shudder, no lockup or converter codes. If there is excessive wear at the plunger valve, regulated converter charge oil can leak to exhaust. Due to this regulated converter charge oil always being present, either as release or apply pressure, severe leakage at the sleeve can result in TCC slip or no apply condition. Sonnax bypass clutch control plunger valve kit 76948-64K restores hydraulic integrity and eliminates these problems.

  • Four .063" orifices match OE hydraulic design, allowing the bypass clutch control valve to match OE timing when stroking to the TCC apply position
  • Highly wear-resistant sleeve and hardcoat anodized plunger valve eliminate converter charge oil loss
  • Annular groove added on sleeve O.D. centers the sleeve in the bore and distinguishes OE from Sonnax related parts
  • Drop-in Zip Valve parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Valve
  • Sleeve

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.

Ford AODE, 4R70W, 4R75W, 4R70E, 4R75E Valve Body Layout

Ford AODE, 4R70W, 4R75W, 4R70E, 4R75E Valve Body Layout
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Bypass Clutch Control Plunger Valve Kit 76948-64K
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Bypass Clutch Control Plunger Valve Kit 76948-64K

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.

4R70E, 4R70W, 4R75E, 4R75W, AODE Bypass Clutch Control Plunger Valve Kit Vacuum Test Locations