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1995 ram 1500 5.2l. When 4x4 is engaged the 4x4 light comes on but the tires aren't locking in.had the vacuum motor and fork assembly out and all looks fine.now what should I look for?

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  • 73 Answers

Do you have locking hubs on the rims ?? just asking

Posted on Nov 26, 2013

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: elec 4 wheel drive light comes on but 4x4 not engaging

change the 2 solenoids on the firewall on the passenger side. they contol the vacum to the acuator.

Posted on Feb 05, 2009

  • 202 Answers

SOURCE: 4 wheel drive engages but hubs are not locking in

chances are that your one of your auto locks have when out on you you can replace them with the manual locking type if you dont mind getting out and locking the hubs in. and a plus to manual locks is that they are much much stronger

Posted on Apr 21, 2009

  • 154 Answers

SOURCE: My Dodge Ram 1500 1995 4x4 wont engage it is a

4x4 is engaged by a solenoid on the transfer case. if water or dirt gets in it it will not work. might also a be electrical wire loose.

Posted on Jun 10, 2009

bomark2002
  • 160 Answers

SOURCE: 2002 KIA Sportage 4x4. 4x4 not working

Is the four wheel drive activated by vacuum? Check vacuum.

Posted on Nov 06, 2009

arauzvictor1
  • 466 Answers

SOURCE: i need a diagaram of a 1995 dodge ram 4x4 vacuum

Ok you shipping this figure i hope will help you Thanks469f0a7.jpg

Posted on Mar 21, 2010

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2003 gmc envoy 4x4 problems. 4200 vortec engine. my front diff doesnt seem to be


The Selectable Four Wheel Drive (S4WD) Front Axle consist of the following components:
• Differential Carrier Housing
• Differential Case Assembly
• Inner Axle Shaft
• Intermediate Shaft Bearing Assembly (located on the right side of the oil pan)
• Electric Motor Actuator
The front axle on Selectable Four Wheel Drive (S4WD) model vehicles uses a disconnect feature mounted on the right side of the oil pan in order to engage and disengage the front axle. When the driver engages the 4WD system, the Transfer Case Control Module sends a signal to the electric motor actuator to energize and extend the plunger inside. The extended plunger moves the clutch fork and clutch fork sleeve across from the clutch fork outer gear that is splined to the right side wheel drive shaft to the clutch fork inner gear that is splined to the inner axle shaft. The locking of the two gears allows the axle to operate in the same manner as a semi-floating rear axle. A propeller shaft connects the transfer case to the front axle. The differential carrier assembly uses a conventional ring and pinion gear set to transmit the driving force of the engine to the wheels. The open differential allows the wheels to turn at different rates of speed while the axle continues to transmit the driving force. This prevents tire scuffing when going around corners and premature wear on internal axle parts. The ring and pinion set and the differential are contained within the carrier. The axle identification number is located on top of the differential carrier assembly or on a label on the bottom of the right half of differential carrier assembly. The wheel drive shafts are completely flexible assemblies consisting of inner and outer constant velocity CV joints protected by thermoplastic boots and connected by a wheel drive shaft.

How To Install Repair Replace 4x4 Front Axle Actuator Chevy Trailblazer...

May 11, 2017 | 2003 GMC Envoy

1 Answer

I woud put my 96 dodge in 4H or 4L but not engage.The 4wd light in the instrument panel woul not came on, need ideas, thanks.


Might try checking the vacuum actuator located on the front drive axle, I believe it is on the right side top of the axle. It has vacuum lines to it that engages a fork to the axle and locks it up, also this is where the 4x4 indicator lite is located at.

Dec 21, 2010 | 1996 Dodge Ram

1 Answer

I have a 2003 f150 4x4 and the front tires are not engaging. Have replaced the ac-curator and the shift fork assembly in the front differential. And fixed 6 vacuum leaks. The 4x4 is a manual shift with...


Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

I don't want to assume that the front axle works correctly, but it sounds like you got past that bit of testing.

Aug 18, 2010 | 2003 Ford F150 Regular Cab

1 Answer

94 Dodge Ram front Axle not locking for 4X4


there is no pressure /vacuum required to lock the axle
the action is the actuator moves a dog clutch that positively engages the gears
so is the problem else where
maybe broken axle , wheel locks are not engaging

May 29, 2017 | 2001 Dodge Ram 2500 Truck

2 Answers

95 dodge 1500 4x4 wont engage but transfer case is go in gear?


There is a vacuum switch on top of the transfer case that gets stuck check that. It redirects vacuum to the vacuum actuator on the front axle when the transfer case is shifted into 4x4.

Mar 21, 2009 | 1995 Dodge Ram

2 Answers

Transfer case wont engage


shift into 4wd and move truck a couple of feet.
if light is still off, park truck block the wheels set the park brake jack right front wheel and try to hand spin the wheel if wheel doesn't turn 4x4 is functioning properly but there is a wiring problem use an ohmmeter to check the 4x4 switch wiring fuse and bulb
if wheel turns freely the front axle or transfer case is not engaged
attempt to hand spin the front driveshft if the driveshaft will spin the transfer case is not engaged check the transfer case shift linkage, problem is in linkage or transfer case internals
if the driveshaft will not spin the transfer case is engaged properly
with trnsmission in neutral or park start engine measure vacuum on the two vac lines at front axle shift motor . one line should have approx 20" vacuum. other line should have none
if no vacuum measured look for vac leak or bad vac switch
if both lines have vac look for a bad vac swithc or ruptured cad actuator diaphragm
if one line has 20" +- VAC
move transfer case lever to 2wd measure vac again lines should have swapped vac signals
if no vac switch bad or 4wd shift likage needs adjusting
if yes vac motor bad or stuck or shift fork stuck
remove vac shift motor from the axle attach vac lines to shift motor engage disengage 4wd
does shift motor plunger move at least 1/2 inch
no shift motor bad
yes check axle shift fork and vac motor for binging

Jan 27, 2009 | 1999 Dodge Ram

3 Answers

Dodge 4x4 Doesn't Engage


1998 dodge ram quad..front end wont lock in or the lights come on to tell you its in 4x4..***** little

Oct 03, 2008 | 2001 Dodge Ram 2500 Truck

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