Sonnax TCC Regulator Valve Kit for 45RFE, 545RFE, 65RFE, 66RFE & 68RFE

The Sonnax 44912-11K TCC regulator valve kit addresses torque converter lockup problems in Chrysler 45RFE, 545RFE, 65RFE, 66RFE, and 68RFE ('18-earlier only) transmissions. In these units, the OE valve design provides poor sealing between the line pressure and converter feed circuits, allowing vital apply pressure to leak directly to exhaust. This results in low vacuum readings and TCC performance issues.

Engineered for drop-in installation, the upgraded Sonnax valve features an extended spool for improved bore contact and sealing. It helps eliminate converter apply fluid loss and improves the reliability of the TCC circuit. Additionally, the kit includes a heavy-duty accumulator spring retainer to replace the weak OE version that is prone to bending or damage from spring load.

Includes:

• Hardcoat Anodized Aluminum Valve
• Accumulator Spring Retainer

Key Features:

• Extended spool enhances sealing and prevents pressure loss
• Hardcoat anodized aluminum resists wear and scoring
• Reinforced spring retainer replaces thin, failure-prone OE part
• Installs easily—no machining or special tools required

Common Symptoms:

• Torque converter issues
• TCC lockup failure or irregular lockup behavior

Cause:
Insufficient sealing at the line pressure to converter feed circuit allows apply fluid to escape past the valve spool into the sump, reducing converter efficiency.

Correction:
Install the Sonnax TCC regulator valve kit to eliminate leaks and restore consistent lockup performance. The added sealing surface and upgraded retainer ensure long-term durability and performance.

Transmissions: 68RFE 2009-2018, 66RFE 2011-UP, 65RFE 2011-UP, 5-45RFE (545RFE) 2001-UP, 45RFE 2000-UP

Vehicle

CHRYSLER
ASPEN 2007-2009 5 SP R/4WD V8 4.7L 5.7L
DODGE
DURANGO 2011-2016 6 SP R/4WD V8 5.7L
DURANGO 2003-2016 5 SP R/4WD V8 5.7L
PICKUP/DAKOTA 2001-2011 5 SP R/4WD V8 4.7L
PICKUP/RAM 1500, PICKUP/RAM 2500, PICKUP/RAM 3500 2002-2012 5 SP R/4WD V8 4.7L 5.7L
DURANGO, PICKUP/DAKOTA 2000-2002 4 SP R/4WD V8 4.7L
PICKUP/RAM 1500 2002-2005 4 SP R/4WD V6 3.7L V8 4.7L
GEELY
TX4 2008-2016 5 SP RWD L4 2.5L
JEEP
CHEROKEE 2002-2014 5 SP R/4WD V6 3.6L 3.7L
COMMANDER 2006-2010 5 SP R/4WD L6 3.7L V8 4.7L 5.7L
GRAND CHEROKEE 2001-2013 5 SP R/4WD V8 4.7L 5.7L
LIBERTY 2003-2007 5 SP R/4WD L4 2.5L 2.8L DIESEL
WRANGLER 2006-2016 5 SP 4WD L4 2.8L
GRAND CHEROKEE 1999-2000 4 SP R/4WD V8 4.7L
LIBERTY 2002 4 SP R/4WD V6 3.7L
LTI
TX4 2006-2017 5 SPD RWD
MITSUBISHI
RAIDER 2006-2008 5 SP R/4WD V8 4.7L
RAM
2500/3500 2009-2016 6 SP R/4WD L6 6.7L
2500/3500, 1500 2011-2016 6 SP R/4WD V8 5.7L 6.4L
1500 2008-2016 5 SP R/4WD V8 4.7L 5.7L
2500/3500 2009-2016 5 SP R/4WD V8 5.7L

Alternate Words: transmission and specialty driveline components