Possible causes of impact when engaging a gear in a Honda automatic transmission:
1. Low transmission fluid level:
* Check the fluid level and add if necessary.
* Insufficient fluid levels can result in insufficient system pressure, causing a shock when the gear is engaged.
2. Contaminated transmission fluid:
* Contaminates over time, causing friction and shock when shifting gears.
* Replace fluid at recommended service interval.
3. Faulty shift solenoid:
* Solenoids control the flow of fluid in the automatic transmission, allowing you to change gears.
* A faulty solenoid can interfere with smooth shifting, causing a knock.
4. Worn clutch clutches:
* Clutches are used to engage and disengage gears.
* Worn clutches can slip, causing shock when shifting gears.
5. Faulty valve body:
* The valve body directs fluid to the appropriate solenoids and clutches.
* A faulty valve body can result in unstable pressure and shock when shifting gears.
6. Faulty automatic transmission speed sensor:
* The speed sensor signals the speed of rotation of the transmission shafts.
* A faulty sensor may provide incorrect information, resulting in shifting problems.
7. Faulty Transmission Control Module (TCM):
* The TCM controls the operation of the automatic transmission.
* A faulty TCM may issue incorrect commands, causing the transmission to shift incorrectly.
8. Failure of mechanical components:
* Such as gears, bearings and shafts.
* Mechanical problems can interfere with gear shifting, causing shock.
Recommendations:
* Check the level and condition of the transmission fluid.
* Replace fluid and filter if necessary.
* Scan the automatic transmission for fault codes to determine the specific problem.
*Consult a certified Honda mechanic for further diagnosis and repair.