September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
Symptoms:
- Converter shudder & TCC slip
- Lube failures
- No lockup
- Overheated fluid & TCC lining
- Poor converter & cooler oil flow
- TCC apply & release concerns
- TCC codes
Cause:
Bore wear at the TCC regulator valve allows pressure loss that leads to TCC and cooler/lube concerns.Correction:
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
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Tooling:
- F-103740-TL3
- VB-FIX
You need this if... View Instructions Find a Distributor
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 combats premature wear
- Advanced oversized 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
