Possible causes of delays when switching in an automatic transmission:
Mechanical problems:
* Low automatic transmission fluid level
* Clutch slippage
* Oil filter clogged
* Torque converter wear
*Damage to switching mechanisms
Electrical problems:
* Malfunction of solenoids
* Damage to sensors
*Wiring problems
* Malfunction of the electronic control unit (ECU)
Hydraulic problems:
*Low oil pressure
* Air in the hydraulic system
* Hydraulic oil contamination
Software problems:
* Incorrect ECU settings
* Outdated software
* Software malfunction
Other reasons:
* Wear of transmission fluid
* Low ambient temperature
* Excessive load on the transmission
* Driving in tow mode for long periods of time