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Transfer case problems

What are the common problems

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Have 2004 Chevy1500z71&service 4wd message comes onafter it in 4H but it still worksHad fluids changed 2 yrs ago.Goes into 4wdfine&seems like it runs good. Comes on sometime even not in 4wd. Thanks


Which transfer case does your truck have ?
SERVICE 4WD
Refer to
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Transfer Case Description and Operation for the Transfer Case - NVG 149-NP3


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 246-NP8


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 261-NP2


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 263-NP1


The SERVICE 4WD indicator is located in the instrument panel cluster (IPC), and shares the common power and ground of the IPC. The transfer case shift control module controls the service indicator by sending the IPC a Class 2 message. This indicator may be controlled with the scan tool using the IPC device controls.
You should take it to the dealer an have it checked for DTC'S -diagnostic trouble codes

Jan 07, 2016 | Cars & Trucks

1 Answer

Transfer case troubleshooting


This is a common problem with the push button 4X4. The most common as the switch, second ist the 4X4 shift actuator motor on tbe side of the transfer case. And tbe third is the tcc module. But first xheck all fuses. Sometimes just simply disconecting the battery for 20 minutes does the trick too.

Sep 03, 2014 | 1999 GMC Yukon

1 Answer

The low range gear will not engage. Is there a common problem with the system?


There has been an Issue with the Transfer Case but not that common and without knowing your Transfer Case Number, it is hard to determine. You would need to make sure it is not the ACTUATOR that is causing the problem or the Switch. You need to read the voltage as it goes in and out of the Actuator to make a final determination on your vehicle.

Jul 17, 2014 | Jeep Grand Cherokee Cars & Trucks

2 Answers

02 blazer will not change 4wd modes


The most common problem with these would be the transfer case 4x4 actuator motor or also called transfer case selector motor, testing would be a good thing to do before replacing it.

Dec 25, 2012 | 2002 Chevrolet Blazer

2 Answers

How do u remove a transfer case


Most suvs have the transfer case linked to the transmission. Best is to take both out at the same time.Generally:
  1. Disconnect the battery
  2. Unplug all wires from the transmission - transfer case unit. Make sure you mark them so you can reconnect them properly
  3. Get inside the car and remove the shift lever(s)
  4. Remove the starter
  5. Remove the clutch slave if there's one or disconnect all cables from the unit
  6. Support the car on stands so you can work easily under it.
  7. Drain the oil from the unit may have 1 or 2 drain plugs
  8. Remove the shafts making sure you marked the alignment where they are joined
  9. Support both the engine and the transmission unit with the appropriate jacks
  10. Unbolt the transmission from the engine
  11. Remove the unit support (s)
  12. Remove the unit from the car.
Important to remember the type of oil that goes in the trans and in the transfer case. They may not be the same. Also, some electrical transfer cases don't use any oil.

Oct 19, 2011 | 2000 Oldsmobile Bravada

1 Answer

I can hear my transfer case shifting when i turn on my 4x4 but it is not working and there is no grinding nose or nothing like that.


if you can hear your transfer case switching then the problem isnt with your transfer case. their are three vaccuum lines that run out of your transfer case switch and if they are dry rotted or burnt in two from the exhaust manifold which is pretty common your four wheel drive will not engage your front differential. go to the auto parts store and buy about 15 feet of 7/32 vaccuum line and trace all the lines and replace them all. that will more than likely fix your problem.

Nov 10, 2010 | 1994 GMC Jimmy

2 Answers

2002 yukon front end wont engage


2002 GMC Yukon

2002 GMC Yukon

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

TRANSFER CASE NO FRONT DRIVE

Transfer Case No Front Drive

Cause

Correction

DEFINITION: The transfer case is not delivering engine torque to the front propeller shaft.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Viscous coupling faulty 1. Inspect the transfer case fluid for being black. If the fluid is

black, it is most likely caused by a viscous coupling failure.

2. Test for a faulty viscous coupling. Refer to Transfer Case

Description and Operation.

3. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

4. Inspect the viscous coupling for a bulged cover. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

5. Replace the viscous coupling if it is faulty. Refer to Transfer

Case Assemble in Transfer Case - NVG 149-NP3 Unit Repair.

Planetary carrier faulty 1. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

2. Inspect for faulty planetary carrier components. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

3. Replace any faulty planetary carrier components. Refer to

Transfer Case Assemble in Transfer Case - NVG 149-NP3 Unit

Repair.

Oct 19, 2010 | GMC Yukon Cars & Trucks

1 Answer

NV244 transfer case is stuck in 4WD, we have tried to get it switched back to AWD, indicator light shows we're back but we're not.


The most common problem with these trucks is the selector motor, done a ton of these, have you checked that? its on the transfer case, heres a couple of diagrams of it, the only other thing is the transfer casea3bf147.gif90b5434.gif

Sep 09, 2010 | 2001 Dodge Dakota

1 Answer

4x4 will not engage on my 1990 Bronco. Light does


It could be the switch, a fuse, a relay, the motor that engages the transfer case (very common problem) or the transfer case itself. Disconnect the motor arm from the transfer case and see if you can move the shift rod by hand. If you can then you know the transfer case is probably OK and you can test from the motor back to the switch.

May 03, 2010 | 1990 Ford Bronco

1 Answer

Where is the vacuum switch located at on the transfer case and can it be changed without pulling the transfer case? its a push button on the dash we pulled the vac hose off the accuator and there is no...


The switches are a very common problem on the S series. It screws into the top of the transfer case. The easiest way to reach it is going up next to the front drive shaft. There should be 3 vacuum lines going to it that attach in a single rubber plug onto the switch. Hope this helps.

Jan 08, 2009 | 1999 Chevrolet Blazer

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