45RFE 545RFE 65RFE 66RFE 68RFE TCC Accumulator Piston & Sleeve Kit

Product Description

TransGo RFE-TCC-ACCUM TCC accumulator piston and sleeve kit for 1999 to 2018 Chrysler, Dodge, RAM and Jeep vehicles with the 45RFE, 545RFE, 65RFE, 66RFE or 68RFE. It repairs excessive wear at the torque converter clutch (TCC) accumulator piston bore in the pump and salvages the pump. No tools are required, and it works with the Tuneless kits.

Specifications

Why it fails

The computer varies the pulse width modulation of the LR/CC solenoid to control converter clutch apply rate. The solenoid output acts on the TCC accumulator piston and the TCC regulator valve at the same time. The accumulator piston dampens the constant oscillation from the LR/CC solenoid and shapes the initial regulation rate of the converter clutch regulator valve.

When the accumulator bore wears, LR/CC solenoid output leaks across the piston to its spring side, which is vented to the sump. The TCC regulator valve loses some signal oil, and the lock-up clutch can slip, shudder or not apply at all. If the slip is severe enough for long enough, the computer sets a lock-up performance code.

These vehicles also let converter slip speed ramp up slightly between gear changes to smooth the shifts. With a worn bore, slip speed can exceed the specified RPM during a gear change, and the gain in engine RPM feels like a flare.

The kit's precision USA-made 7075 aluminum sleeve and O-ring seal inside the existing worn bore. The redesigned steel piston, two springs and retainer then work with the sleeve to restore the circuit.

Corrects, prevents or reduces: codes P1740, P0740 or P0741, lock-up slip, lock-up shudder, flare-up during gear changes, no 4th, 5th or 6th on some models, and overheating.

What's included

• Precision USA-made 7075 aluminum sleeve and O-ring
• USA-made hardened steel accumulator piston
• Two springs
• Retainer