If your gears slip when accelerating, it means the transmission is not staying in the correct gear. This causes the engine to rev without delivering power to the wheels. Gear slippage reduces performance, increases wear, and can make your vehicle unsafe to drive. An assessment is needed to identify whether the issue is with the transmission, clutch, or related components.

What does it mean if gears slip when accelerating?

Gear slippage occurs when the transmission fails to hold the selected gear. Instead of transferring power smoothly, the engine revs while the car struggles to accelerate. This can be caused by worn components, low transmission fluid, or internal transmission faults.

Common causes of gears slipping when accelerating

• Low or leaking transmission fluid
• Worn or burnt transmission clutches (automatic)
• Failing torque converter
• Worn clutch disc or pressure plate (manual)
• Damaged or worn transmission bands
• Faulty transmission solenoids or valve body
• ECU or transmission control module issues

Why do you need to fix this problem quickly?

Slipping gears can cause overheating, internal damage, and eventual transmission failure. It also makes driving unpredictable and unsafe, especially when merging, overtaking, or climbing hills.

How do you know when to get it checked?

You should book an inspection if:

• The engine revs without corresponding acceleration
• Gears change unexpectedly or slip into neutral
• You feel hesitation or jerking when accelerating
• Burning smell or transmission fluid leaks are present
• The Check Engine or transmission warning light is on

What happens during an assessment?

A mechanic will:

1. Check transmission fluid level and condition
2. Inspect for leaks around seals and gaskets
3. Test drive to replicate slipping symptoms
4. Scan the ECU/TCM for diagnostic trouble codes
5. Inspect clutches, bands, solenoids, or torque converter
6. Advise on whether repair, rebuild, or replacement is required

How much does it cost to fix?

Minor fixes like fluid replacement or solenoid repairs may cost $250–$600. More extensive transmission repairs can range from $1,500–$3,500+. Full transmission replacement may cost $4,000–$7,000+ depending on the vehicle.

Is it unsafe to drive with gears slipping?

Yes. A slipping transmission can leave you without power when you need it most, increasing the risk of accidents. Driving with this issue can also cause further transmission damage, so it should be inspected and repaired immediately.