Skip the auto shop - Our mechanics make house calls

Q: Transfer case trouble

asked by on

I got the truck with a transfer case that was locking up. So the "dealer" put another one and it stopped locking up but instead slowly rolls while in park and whines and slips on take off almost through first gear and then its fine. After a few months it burned out leaving me stranded out in the middle of no where. I got a rebuilt one from a place called transfer case express. I put it in and after the first day it started whining too but very faint. I have another rebuilt tcase waiting to go in but I need to find out whats going wrong before I mess this one up too.

The rolling while in park should not have anything to do with the transfer case as this is a separate piece of the drivetrain controlled by the transmission. There is a pawl on the end of the transmission shaft (assuming this is the stock 4L60E transmission) that should keep the vehicle in park. As to the whining sound, I would first check to be sure the transmission and transfer case both have the correct amount of fluid in them. This can also be caused by a transmission pump or potentially a torque converter that is going out as well. Lastly, I would also recommend checking the U-joints for excessive play as this can also cause a whining sound as you describe.

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: Im unsure what service tire monitor means and service ride control on my 2004 cadallic escalate

Hi there. Typically these messages will display together when there is an error detected from the wheel speed sensor or the tire pressure sensor. It would be a good idea to have a professional mechanic come to your location and...

Q: No click no crank no start

It sounds like you ran your battery down. You should first jump start the battery to see if the vehicle will crank up. If you get it started again then get the dead battery recharged and then have it load...

Q: Would the crankshaft be the issue for the car losing power or misfiring gears?

Hi! It sounds like there are a number of things that could be going on with your Mountaineer. If you feel like it's in neutral when you're in drive, that is a transmission issue. You can start by checking the...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.