Skip the auto shop - Our mechanics make house calls

Q: switching into 4hi from 2hi by itself

asked by on

I can be driving down the highway and my truck will switch from 2hi into 4hi and there are times that it will do it when turning and it can make it really hard to turn at times. I can put it into 2hi again and it willbe fine till it pops into 4hi.

My car has 101111 miles.
My car has an automatic transmission.

Your vehicle uses an electric transfer case motor to switch from 2WD to 4WD, and that motor or the associated wiring may be failing and switching itself over bumps. I would begin by checking the wiring and connectors to the motor, as well as checking the motor itself. Try starting the car and tapping on the motor with a screwdriver, and moving all the wiring to see if you can get it to shift on its own. It’s also possible that it has a failed switch. I would recommend having a qualified professional, such as one from YourMechanic, diagnose the electric transfer case for you.

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: Will a drive shaft from a 93 chevrolet 1500 4×4 fit in a 05 chevrolet avalanche 2wd

The two driveshafts are most likely different lengths due to one being a 4wd and the other 2wd. You could lay them side by side and compare them to see if they are the same, but I doubt that this...

Q: what causes transmission to not shift? 2001 Dodge Ram 1500

Hey there, thanks for writing in about your 2001 Dodge Ram 1500. This is a common issue on many automatic transmissions. There is a speed sensor which is a magnetic coil that tells the vehicle's control module what the speed...

Q: My car automatic shuts down and when it starts again black smoke come out heavy from muffler.

Hi there. Check the ignition system on your vehicle and see when the last time your vehicle has had a tune-up. I recommend replacing the spark plug wires and plugs with the factory design plugs and cleaning the fuel injection...

Related articles

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...