how to fix transmission jerking in my Ford Mustang S550 (2015-2023)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, funnel, transmission fluid.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Fluid Change

• Sub-steps:
  1. Remove the transmission pan bolts using a socket set.
  2. Carefully lower the transmission pan and allow the old fluid to drain into a suitable container.
  3. Inspect the transmission filter (if applicable) and replace it if it is clogged or damaged.
  4. Clean the transmission pan and magnet to remove any debris.
  5. Reinstall the transmission pan with a new gasket and torque bolts to the manufacturer specifications (typically around 10-12 ft-lbs).
  6. Refill the transmission with the recommended type and amount of fluid using a funnel (typically Mercon LV for Ford transmissions).

3. TPS and TCM Check

• Sub-steps:
  1. Locate the throttle position sensor and disconnect it.
  2. Use a multimeter to check the TPS voltage output; it should vary smoothly with throttle position.
  3. If faulty, replace the TPS and reconnect.
  4. Reconnect the battery and use the OBD-II scanner to check for TCM updates or faults.
  5. If needed, perform a TCM reset or reprogramming through the scanner.

4. Mount Inspection

• Sub-steps:
  1. Inspect the engine and transmission mounts for cracks or excessive wear.
  2. If damaged, remove the old mounts using a socket set and install new ones, ensuring they are properly torqued to specifications.
  3. Recheck alignment and clearances.