Possible reasons why an automatic transmission drives well in reverse but poorly in forward:
Transmission problems:
* Wear or damage to forward clutches
* Clogged or leaking hydraulic fluid in the forward channel
* Forward shift valve malfunction
* Torque converter malfunction
Electrical problems:
* Problems with solenoids that control forward gears
* Faulty gear selector position sensor
* Poor contact in wiring associated with forward gears
Engine problems:
* Insufficient engine power to move forward
* Ignition or fuel system malfunction affecting engine performance
Other possible reasons:
*Low transmission fluid level
* Contaminated or old transmission fluid
*Mechanical problems with the driveshaft or axle shafts
Diagnosis steps:
1. Check the level and condition of the transmission fluid: The fluid should be at the required level and pink in color, with no signs of burning or contamination.
2. Diagnose with an OBD-II scanner: The scanner can identify trouble codes related to the transmission, engine, or electrical system.
3. Check transmission solenoids and valves: Make sure they are operating properly and receiving proper power.
4. Inspect the torque converter: Check for leaks or excessive noise.
5. Check the driveshaft and axle shafts: Make sure they are not damaged and are securely fastened.
If you are unable to diagnose and fix the problem yourself, contact a qualified mechanic for help.