The 2020 Ram ProMaster's 6-speed automatic transmission can develop jerking during low-speed operation, affecting commercial use comfort and potentially indicating developing problems.
ProMaster Transmission
The ProMaster uses a 62TE 6-speed automatic transmission adapted from the Chrysler minivan platform. Commercial use with frequent stop-start operation subjects the transmission to different stresses than passenger vehicle use.
Causes of Transmission Jerking
Torque Converter Issues
The torque converter lockup clutch can engage roughly during low-speed operation, causing jerking. Contaminated fluid worsens this condition.
Shift Solenoid Problems
Electronic shift solenoids control gear selection and engagement pressure. Failing solenoids cause rough or jerky shifts.
Adaptive Learning State
The transmission adapts to clutch wear and driving patterns. Corrupted adaptation values cause inconsistent shift quality.
Fluid Condition
Degraded transmission fluid loses friction properties needed for smooth clutch engagement. Commercial use accelerates fluid degradation.
Low-Speed Emphasis
Low-speed jerking often relates to torque converter or 1-2 shift issues since these operate during parking and traffic situations.