Question about 2004 Isuzu Rodeo

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Transmission wont go into 4x4 mode.

Replaced my trans. and now my 4wheel high/low wont move. my 4x4 mode doesn't do anything either.

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Probally just linkage adjustment

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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Where is the four wheel module located on a 2001 f350 7.3 l lariat 4x4 nothing on the four wheel drive works and I checked all the fuses and are all fine


Have it check for DTC'S - diagnostic trouble codes ?
GEM Diagnostic Trouble Code (DTC) Index
GEM Diagnostic Trouble Code (DTC) Index DTC Description Source Action C1728 Transfer Case Unable to Transition Between 2H and 4H GEM CARRY OUT the electronic shift function test. REFER to Function Test - Electronic Shift in this section. C1729 Transfer Case Unable to Transition Between 4H and 4L GEM CARRY OUT the electronic shift function test. REFER to Function Test - Electronic Shift in this section. P0500 Vehicle Speed Sensor (VSS) Malfunction GEM GO to Pinpoint Test F . P1804 Transmission 4-Wheel Drive High Indicator Circuit Failure GEM GO to Pinpoint Test H . P1808 Transmission 4-Wheel Drive Low Indicator Circuit Failure GEM GO to Pinpoint Test I . P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure GEM GO to Pinpoint Test E . P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground GEM GO to Pinpoint Test E . P1819 Transmission Park/Neutral Position Switch Short Circuit to Ground GEM GO to Pinpoint Test F . P1820 Transmission Transfer Case Clockwise Shift Relay Coil Circuit Failure GEM GO to Pinpoint Test E . P1822 Transmission Transfer Case Clockwise Shift Relay Coil Short to Battery GEM GO to Pinpoint Test E . P1828 Transfer Case Counterclockwise Shift Relay Coil Circuit Failure GEM GO to Pinpoint Test E . P1830 Transmission Transfer Case Counterclockwise Shift Relay Coil Short Circuit to Battery GEM GO to Pinpoint Test E . P1832 Transmission Transfer Case Differential Lockup Solenoid Circuit Failure GEM GO to Pinpoint Test G . P1834 Transmission Transfer Case Differential Lockup Solenoid Short Circuit to Battery GEM GO to Pinpoint Test G . P1865 Transmission Transfer Case Contact Plate Power Short to Ground GEM GO to Pinpoint Test E . P1866 Transmission Transfer Case System Concern - Servicing Required GEM CARRY OUT the electronic shift function test. REFER to Function Test - Electronic Shift in this section. P1867 Transmission Transfer Case Contact Plate General Circuit Failure GEM GO to Pinpoint Test E . P1876 Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure GEM GO to Pinpoint Test G . P1877 Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short to Battery GEM GO to Pinpoint Test G . - For All Other DTCs GEM GO to Section 419-10 .
Your best bet , take it to a qualified repair shop that has the diagnostic tool to trouble shoot .
Principles of Operation
Transfer Case - Electronic Shift
The four-wheel drive, electronic shift-on-the-fly feature electrically shifts the vehicle transfer case between 2WD, 4X4 HIGH, and 4X4 LOW. The system mode is selected by the operator through the mode select switch (MSS) on the instrument panel. The operator is informed which mode the system is in by two instrument cluster indicators, one for 4X4 HIGH which is 4X4, and one for 4X4 LOW which is LOW RANGE (in 4X4 LOW both the lamps are on). Shifts into 4X4 HIGH can be made at any speed. When shifting into 4X4 HIGH with the vehicle stationary, tooth blockage may occur, preventing shift completion. When the vehicle is driven above 8 km/h (5mph) the shift will complete. When shifting in or out of 4X4 LOW, the generic electronic module (GEM) requires that the vehicle speed be less than 5 km/h (3 mph), the brake pedal be applied, and the transmission in NEUTRAL (automatic transmission) or the clutch pedal be depressed (manual transmission). (The digital transmission range [TR] sensor informs the GEM when the automatic transmission is in the NEUTRAL range position.)
The gearmotor encoder assembly is mounted externally on the transfer case. It drives a rotary cam which moves the mode fork and the range fork within the transfer case between the 4X4 HIGH, 4X4 LOW, and 2WD range positions.
The GEM uses two relays to control the gearmotor encoder assembly shift between 4X4 HIGH, 4X4 LOW, and 2WD modes. The GEM controls the pulse vacuum hublock (PVH) solenoid which supplies engagement and disengagement vacuum to control the hublocks.
The GEM accomplishes shifts by interpreting inputs from:
  • mode select switch (MSS)
  • vehicle speed signal (transmitted from the ABS system)
  • gearmotor encoder plate position
  • brake pedal switch
  • digital transmission range (TR) sensor (automatic transmission)
  • clutch pedal position (CPP) switch (manual transmission)
  • ignition switch
Based on these inputs, the GEM controls the shifts into 2WD, 4X4 HIGH, or 4X4 LOW with the following outputs:
  • low to high relay (clockwise)
  • high to low relay (counterclockwise)
  • pulse vacuum hublock (PVH) solenoid
  • gearmotor encoder assembly
The electronic shift-on-the-fly (ESOF) system has a feature which allows the driver to override the vacuum operated hublocks. When the front hublocks are manually turned to the LOCK position, the hublocks are locked at all times, overriding the vacuum operated system. If the front hublocks are manually turned to the AUTO position, the hublocks can only be locked by turning the MSS to 4X4 HIGH or 4X4 LOW position.

Jun 12, 2017 | Cars & Trucks

1 Answer

1996 f150 4x4 e4od automatic stuck in 2nd or limp mode while in 2wheel drive or 4wheel high,when i put it in 4wheel low the transmission shifts in all gears. At fist I was told the transmission was bad,so...


Wow,
That's odd ,push button shift I suppose . Ford doesn't have a 2nd gear limp mode ,I don't think.
Has to be the manual linkage at the shifter,try manually shifting? still no low?

Oct 10, 2011 | 1996 Ford F150 Regular Cab

1 Answer

Does the vehicle have to be in neutral when you put it in 4 wheel drive, or what is the proper way to engage the 4 wheel drive


it has to be running and in neutral to engauge the 4x4. shift to neutral,then push the 4x4 option that you want. 4wheel high you can use almost any sensible speed.4wheel low is only for low speed 15 to 20mph is best for 4wheel low,otherwise will damage engine or transfer case. when you take it out of 4x4 it has to be in neutral also. thank you for choosing fixya.com

Jan 10, 2011 | 1995 Ford Explorer

1 Answer

When i put my 03 chevy 4x4 in 4 wheel drive there is a loud popping sound and 4wheel low truck wont move it a push button 4 wheel


you may have a broken transfer box or a damaged locking hub on the wheels that arent used in 4x4 mode, i.e. if your car is FWD unless its in 4-low, check the rear locking hubs for failure. Other wise it sounds like a transmission fault in the aforementioned transfer box or differential.


Oct 23, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

Grinding in and out of 4 wheel drive


You say 'new' truck, 09? or new used? I have had 3 Fords, 3 w/ manual trans. case, if you go into 4x4 Low range, you must come to a complete stop before shifting the trans. case to 4x4 mode, and I always put trans (automatic) in neutral before slipping into 4x4, it engages smoothly, no grinding. 4x4 high range can be put in while moving, but I would let off the gas pedal, shift to 4x4 high range, then resume accelerating. If there is any grinding going on doing it as above, something isn't right. Check the trans. case fluid level also, to make sure that's not an issue.

Aug 15, 2009 | 1998 Dodge Ram 1500 4WD

1 Answer

1991 Chevy K1500 4wd transmission stuck


More than likely the trans is not stuck in neutral, it could possibly be low on fluid. That is the first thing I would check. If it is full then try putting the transfer case into 4X4 high and then low and see if it will move. If it does after you do this, then the problem would be inside of the transfer case. If it does not move in any gear it would more than likely be a internal failure of the trans.

Aug 01, 2009 | 1994 Chevrolet C1500

2 Answers

When i turn the dial to 4wheel low the light


4 wheel low engages only when u shift trans into neutral or park never when moving it can cause transfer case damage.

Jul 16, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

How to shift into 4wd


Ford has 2 types of 4x4 system engagement. One is a knob on the dash that you just turn to 4wheel drive high or low. The other system is the 4x4 transfer case shift on the transmission tunnel (hump) between the driver and passenger seats. To shift into 4 wheel drive high while driving, just let off the gas and shift transfer case into 4H position, and continue driving. To shift into 4 wheel drive Low, stop the vehicle completely, put transmission in neutral, shift transfer case into 4Low position, put trans. in gear, and start driving. I am assuming before doing the above, you have locked in ( turned the front hubs to 4 wheel drive position.) Any further questions, let me know.

May 16, 2009 | 2003 Ford F150 Regular Cab

1 Answer

1993 4X4 BLASER 4WHEEL DRIVE


Your blazer is equipped with a shift on the fly four wheel drive. That means that at speeds less than fifteen miles per hour you can shift into or out of four wheel drive by simply pushing the four wheel high button. If you wish to shift into four wheel low. Stop, put the transmission into park or neutral, and push the four wheel low button. Same procedure for shifting back out. Never shift into or out of four wheel low while moving. And be careful in four wheel low. At full throttle your still barely moving, you don't want to blow your engine up!

Dec 31, 2008 | 1994 Chevrolet S-10 Blazer

1 Answer

Transfer case will not stay in 4x4 mode when shifted


CHANGED FLUID IN TRANSFER CASE AND FRONT DIFFERENTAIL!!!! Don't burn it up, Add syncromesh fluid to each unless atf is used

Dec 30, 2008 | Suzuki Grand Vitara Cars & Trucks

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