Mileage: If your car has high mileage (around 100,000 miles or more), it's a good idea to have your transmission checked as preventive maintenance.
Age: Older cars may benefit from regular transmission checks, especially if they are showing signs of wear, such as shifting roughly or leaking fluid.
Service history: If you don't know when the transmission fluid was last changed or serviced, it's a good idea to have it checked and serviced if necessary.
Symptoms: If you are experiencing any transmission problems, such as trouble shifting gears, slipping gears, or unusual noises, it's important to have your transmission checked as soon as possible.
If you're not sure whether or not to have your transmission checked, it's always best to consult with a mechanic or the manufacturer's guidelines for recommended service intervals. They can assess your vehicle and let you know if any further inspection or adjustments are needed.