Jett wrote:
So what I’m reading is that the transgo kit has update parts for the front pump that eliminates the need to replace the pump, is that what you’re understanding is also? I don’t know which pump I have to be clear, I’m only assuming it has not been updated.
The TransGo Kit raises line pressure to help firm up the shifts and helps with adding additional holding force on the lockup clutches in the torque converter.
It is recommended to replace the front pump assembly with the newer updated version. Read why below*1
The front pump has some small plungers and bores in the housing that wear out with age and can become problematic. A TransGo Kit does not solve all the wear issues.
*1 wrote:
Transmission front pump 68009879AB (RL009879AE)
Severe wear of the TC limit valve bore in the front pump housing results in loss of converter release oil pressure. Reduced release pressure at low speed and idle can drag the converter linings, causing engine surge, pulsation or stall.
The torque converter limit valve spring in the 45RFE, 545RFE front pump can often break. This valve limits converter release pressure. A broken spring can cause the valve to become stuck and result in converter clutch release issues including engine stalls at low speeds.
Chrysler vehicles equipped with 45RFE, 545RFE and 68RFE transmissions often experience TCC related troubles. These may or may not include trouble codes accompanied by TC clutch slip, no lockup, overheating and / or loss of fuel economy. In some cases, the TC clutches may be unable to release TC lockup, resulting in improper lockup functions and / or complete engine stalling. Problems such as these can be caused by excess wear in the TCC switch valve bore, which allows vital control pressure to escape the circuit. Replacing the complete transmission oil pump assembly with a new updated assembly or reconditioning the bores with the proper tools and installing an oversized TCC switch valve kit can restore crucial clearances for renewed TCC control and operation.
Exploded View of Front Pump in 545RFE
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