Skip the auto shop - Our mechanics make house calls

Q: Car is having transmission issues (I think)

asked by on

I change gears and disengage the clutch. Then I start to accelerate but if I put moderate pressure on the pedal (not pedal to the floor) my Mustang will rev to 3k rpm then drop back to about 2.1k rpm. As soon as it drops back to 2.1k it's as if it got its missing power and gets going faster than when it was at 3k. Meaning my Mustang was still applying power to the tires when it jumped to 3k. It stays at 3k for about 2 seconds and then drops to 2.1k. I don't think it's the clutch. Or could it??? Please help!!!

My car has 90000 miles.
My car has a manual transmission.

A: If after switching gears, the engine RPM’s ...

If after switching gears, the engine RPM’s are rising but the vehicle is not accelerating, but after a moment you do feel acceleration albeit at a point where the RPM’s are lower, that sounds like the clutch is slipping during that brief "interval". In other words, it sounds to me as if you are not describing the engine as bogging down (feeling under excessive load) once you release the clutch but rather the engine speed IS increasing in the higher gear but without accompanying acceleration in vehicle speed. That is a slipping clutch. However, a lot can get lost in the translation. A manual transmission specialist from YourMechanic would need to examine the situation first hand and could then make quick work of a diagnostic on your clutch system. Feel free to follow up with YourMechanic to schedule an inspection and get this resolved for you. If you have additional questions or concerns please re-contact as well.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have to pop clutch to start car

Hello. By the description of your problem, there can be several causes. Make certain that your battery is in good condition, and that your lights and accessories come on normally. If your lights dim when you try to key start...

Q: Car not accelerating and doesn't always start

Your issue sounds like it could be a failed fuel pump in its last moments of life. With lack of fuel the vehicle will run very poorly and will not be able to accelerate and won't be able to run...

Q: How Long Does a Clutch Slave Cylinder Last?

The clutch slave cylinder is part of the hydraulic clutch system that includes the hydraulic slave cylinder, master cylinder and metal, and plastic or rubber lines from the master cylinder to the slave cylinder. The slave cylinder may be mounted...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...