2010 Dodge Challenger
Mileage
220,867
Service Date
9/10/2026
Services Performed
- We started the vehicle and brought the engine up to operating temperature with the air-conditioning on and commanded the cooling fan high speed relay on with our scan tool and found that the engine cooling fan would speed up momentarily but then slow back down. We then checked voltage going Into the cooling fan control module from the high speed relay and found that it was erratic. We replaced the high speed cooling fan relay and found that now the cooling fan operates according to spec. We then test drove the vehicle and noticed that under a light acceleration at 30 mph and above the vehicle has a shudder that felt like an engine misfire. We monitored misfire data and found no misfires present or any misfire history. We then monitored transmission data and found that the desired torque converter slippage versus the actual torque converter slippage does not match. The converter clutch slippage oscillates from 0 to 90 rpm never holding the commanded 25 rpm slippage. Based on these findings it confirms that the torque converter clutch has failed, and based on the mileage we recommend rebuilding the transmission.
John A. gave our service a 5 star review on 9/10/2026
