Skip the auto shop - Our mechanics make house calls

Q: locks up at high rpm then able to free up and run again

asked by on

I have a 2002 ford courier (ford ranger) 2.6L 4x4 ute. When i rev the engine up to roughly 4000 rpm, either in neutral or any gear, I get a loud squealing grinding noise and then the motor seizes up.. Then it will not turn over again. The starter just goes clunk once and wont start.

But, If Ithen put the car in 5th gear and rock it back and forth i can free up the engine and it will start fine and idle/drive fine until i get to high rpm and the same issue occurs..

Once the noise starts if I quickly turn the motor off it will not seize and i can start and run fine until the revs get too high and it happens again.

any ideas??

My car has 245000 miles.
My car has a manual transmission.

The problem may be the transmission pilot bearing for the transmission input shaft on the back of the crankshaft seizing up or the input shaft on the transmission seizing. If it is not the transmission, then it is the internal engine camshaft or crankshaft seizing up and rocking the engine with the transmission loosening the seized bearing. Have a mechanic listen to the noise and verify what is failing in the engine or transmission in order to diagnose the car’s starting problem.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Need cv boot replacement

The best way to resolve a torn cv boot on your vehicle is to replace the entire cv axle. This is because the replacement cv boots that are available are not very durable and will likely require replacement again. Also,...

Q: Fast Idle does not activate when A/C Compressor engages.

The idle is not supposed to increase in speed when your compressor engages, rather the throttle plate should adjust at the same time the A/C engages to maintain the same RPM at idle. This will keep the idle the same...

Q: Transmission slips out of fifth gear

Hi there, thanks for writing in about your 1993 Mazda MX-6. It sounds like a mis-adjusted shifter linkage or a worn shift fork for 5th gear. Either or both of these could cause the 5th gear to not stay engaged...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...