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  • Converter shudder & TCC slip
  • Lube failures
  • No lockup
  • Overheated fluid & TCC lining
  • Poor converter & cooler oil flow
  • TCC apply & release concerns
  • TCC codes


Bore wear at the TCC regulator valve allows pressure loss that leads to TCC and cooler/lube concerns.


Recover hydraulic control and renew TCC performance by reconditioning the bore and installing Sonnax oversized TCC regulator valve kit.

JR710E, JR711E, JR712E, RE7R01A

Oversized TCC Regulator Valve Kit
Part No. 103740-03K

You need this if... View Instructions

Jatco/Nissan JR710E, JR711E, JR712E and RE7R01A transmissions often exhibit TCC apply/release concerns, overheated fluid, poor cooler/lube flow and/or TCC codes. These symptoms may be caused by excess wear of the TCC regulator valve bore, which allows critical control pressure to escape the circuit. Reconditioning the bore and installing Sonnax oversized TCC regulator valve kit 103740-03K restores operational clearances for renewed TCC/cooler/lube operation.

  • Hardcoat anodized aluminum valve resists premature wear
  • Advanced oversize valve design utilizes OE spring to duplicate OE operating parameters
  • Annular grooves help center valve in bore to reduce future side-load wear
  • Valve
  • End Plug

September 30, 2005

Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

Gregg Nader

Topics: Diagnostics And Theory Transmission

Read Now
  • 103740 03k combo
  • 103740 03k

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.

  • 103740 03k in test