Possible reasons for the automatic transmission crackling when the speed is turned on:
* Friction lining wear: The linings in the transmission can wear over time, causing slippage and vibration that causes chattering noises.
*Lack of transmission fluid: If the fluid level is too low, it will not be able to effectively lubricate and cool the transmission components, which can result in a rattling noise.
* Worn or damaged solenoids: Solenoids control the flow of fluid in the transmission. Worn or damaged solenoids can cause rough shifting and rattling noises.
* Torque converter problems: The torque converter connects the engine to the transmission. Worn or damaged torque converter can cause a rattling sound when the engine is engaged.
* Worn or damaged bearings: Bearings support transmission components. Worn or damaged bearings can cause rattling and vibration.
*Using the wrong transmission fluid: Using the wrong fluid can cause transmission damage and cracking.
Recommended actions:
*Check transmission fluid level: Make sure the fluid level is within the range indicated on the dipstick.
* Check for leaks: Inspect the transmission for fluid leaks. Leaks can cause low fluid levels and damage to the transmission.
*Change Transmission Fluid: Changing transmission fluid regularly can help prevent wear and squealing.
*Consult a mechanic: If the rattling noise does not stop, it is recommended that you take it to a qualified mechanic for diagnosis and repair.