Possible reasons for the automatic transmission jerking when reversing:
1. Low transmission fluid level:
* Check the fluid level in the automatic transmission. Add fluid if necessary.
2. Worn transmission fluid:
* Transmission fluid loses its properties over time. Replace it according to the manufacturer’s recommendations.
3. Dirty or clogged automatic transmission filter:
* The automatic transmission filter cleans the transmission fluid. A dirty filter can restrict fluid flow, causing jerking. Replace the filter.
4. Worn clutches or brake bands:
* Frictions and brake bands allow the automatic transmission to change gears. Worn components can slip and cause jerking.
5. Faulty solenoid:
* Solenoids control the flow of transmission fluid into the automatic transmission. A faulty solenoid can prevent smooth shifting.
6. Malfunction of the electronic control unit (ECU):
* The ECU controls the operation of the automatic transmission. A faulty ECU can give false signals, causing jerking.
7. Problems with differential:
* The differential distributes power to the drive wheels. A faulty differential can cause jerking when driving in reverse.
8. Worn CV joints (constant velocity joints):
* CV joints ensure the transfer of power to the wheels when cornering. Worn CV joints can cause jerking while driving.
Diagnosis and troubleshooting:
* Start by checking the transmission fluid level and condition.
*If the fluid level is normal, have the automatic transmission inspected by a qualified mechanic.
* The mechanic will check fault codes, inspect the automatic transmission and perform the necessary tests to determine the cause of the jerking.
* Depending on the cause of the malfunction, it may be necessary to replace the automatic transmission fluid, filter, clutches, brake bands, solenoids, differential, CV joints or repair the ECU.