What happens when you put too much transmission fluid in your car?

Excess transmission fluid can cause several adverse effects to the transmission. If the fluid stays above the recommended level, it can cause it to start mixing with air. This can lead to gear slippage, hard shifting, and other transmission shifting issues.

What are the symptoms of too much transmission fluid?

Overfilled Transmission Symptoms

  • Higher Fluid Level on Dipstick. If you think you might have put too much fluid in the transmission, the problem is easy to spot by looking at the dipstick. …
  • Trouble Changing Gears. …
  • Leaking Fluid. …
  • Strange Noises. …
  • Overheating.

How do you fix an overfilled transmission?

How to Deal With Transmission Fluid Overfilling? ​ When you put too much transmission into the engine, you can have it resolve by a service garage or drain it on your own by applying a filler tuber changing the cooler line or taking the pan drain plug out.

Is it OK to slightly overfill transmission fluid?

If it’s only slightly over, say less then a pint, it will be fine. Most auto makers know this is going to happen, so there is a margin for error. If it’s any more than that, I’d recommend draining some out or it may not function properly and could cause damage.

Can too much transmission fluid cause hard shifting?

If you overfill it, the transmission will experience hard shifting and slippage. Another consequence of overfilling your transmission is that it will cause the fluid to lose its lubricating properties. It could also lead to the entire system blowing up and not functioning.

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Can too much transmission fluid cause no reverse?

Transmission fluid levels

A transmission low on fluid will cause the engine to race but not shift into reverse. Check your owner’s manual to locate the transmission dipstick and the specific automatic transmission fluid (ATF) or manual transmission fluid your vehicle’s make, model and year needs.