Quick answer
A slipping transmission — where the engine revs but the car barely accelerates — is usually caused by low or burnt fluid, though internal clutch wear or a failing solenoid can also be to blame. The only true quick fix is checking and topping up the fluid; persistent slipping points to an internal problem requiring professional repair.
Common causes
- Low transmission fluid from a leak or long service interval
- Burnt or degraded fluid that has lost its hydraulic properties
- Worn clutch plates or bands inside the transmission
- A faulty shift solenoid causing incorrect gear engagement
How to diagnose it
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Check the transmission fluid level and condition
With the engine warm and running, pull the dipstick (if equipped). Low, dark, or burnt-smelling fluid is the most common cause of slipping.
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Top up or service the fluid
Add the exact fluid specified for your transmission to the full mark. If the fluid is burnt, a fluid and filter service may help, but cannot repair internal wear.
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Scan for transmission codes
Use a scanner that reads transmission codes (not just engine). Solenoid or pressure codes point to an electrical or hydraulic fault rather than mechanical wear.
When to see a mechanic
- The fluid is full and clean but the transmission still slips
- You find metal shavings in the fluid
- The slipping is accompanied by harsh or delayed shifting
Related questions
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