Question about 2005 Pontiac Montana

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Question about GM Versatrak AWD

Have a '05 pontiac Montana with Versatrak AWD, which of course doesn't work. 99% sure it's the differential clutch pump actuator valve & more specifically the temp. sensor within. The more I research this, the less appealing the Versatrak appears to be. Seems the differential clutches are somewhat engaged all the time, leading to often required multiple flushings of the magic Ver$atrak fluid. My question is; would it be possible to put a switch in the wire for the temp. sensor to disable the AWD & only turn it on when actually needed? Has anybody done this, which wire is it, & do you cut continuity or send it to ground.

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SOURCE: 2000 pontiac montana torque converter clutch

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SOURCE: where is the clutch pump actuator check valve

it's on the rear wheel drive compartment b672020.gif

Posted on Jul 18, 2010

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SOURCE: 2004 AWD Aztek - AWD Disable light on.

I had this happen to my car and paid entirely too much to the dealer to get it fixed. For me, it was the harness that you think it is, and it affected the battery- I needed to replace it- and also the computer. I'm not sure if mine was frayed, but I've heard that this harness has been known to become frayed and shorts out because of that, which is what I imagine causes the failure, and the shorting out is what destroyed my battery and fried my computer.

Posted on Nov 19, 2010

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1 Answer

AWD disabled, why


Wheel sensor/bearing bad, wire by the bearing broken,ABS module bad, bad ground wire for the ABS pump, ABS pump bad, The actuator/switch in the rear differential is bad, the wire for the rear switch is broken, the clutches in the rear differential are worn out. No oil in the rear differential (which trashes out the differential). And the fuses could be blown. I think I have covered all of it. From older ones to newer ones.

Mar 27, 2015 | Cars & Trucks

3 Answers

The anti-lock light is on and it is causing the awd to disable what should I do?


If the ABS is causing the AWD to come on. Scan it and find out which wheel sensor/bearing is bad, replace it. This could happen. Most AWD lights are because the sensor/actuator in the rear axle assembly is bad. A high dollar part.

Jan 03, 2015 | 2003 Buick Rendezvous

1 Answer

VERSATRACK HOW TO REPLACE rear diff acuator


Do you mean AWD rear flow valve? Put drain pan under rear differential, unhook connector, unscrew flow valve bolt and pull it out. Reverse order to install. You will need to refill with 4 pints of versatrak fluid (unscrew fill plug) because when you remove the flow valve, all the versatrak fluid comes out. You can only get versatrak fluid at any GM dealership. Do not reuse old nasty versatrak fluid because that is why it got plugged up in the first place.

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Oct 20, 2014 | 2002 Buick Rendezvous

1 Answer

Awd disabled 2005 buick rendesvous


It is the AWD rear flow valve, on the rear differential that is bad, not the ABS! This is how to replace it after buying a new one. Put drain pan under rear differential, unhook connector, unscrew flow valve bolt and pull it out. Reverse order to install. You will need to refill with 4 pints of versatrak fluid (unscrew fill plug) because when you remove the flow valve, all the versatrak fluid comes out. You can only get versatrak fluid at any GM dealership. Do not reuse old nasty versatrak fluid because that is why it got plugged up in the first place. (ASEGM)

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Oct 17, 2014 | 2005 Buick Rendezvous

1 Answer

AWD Disabled light is on in my 2002 Buick rendezvous


The problem is the AWD rear flow valve. Put drain pan under rear differential, unhook connector, unscrew flow valve bolt and pull it out. Reverse order to install. You will need to refill with 4 pints of versatrak fluid (unscrew fill plug) because when you remove the flow valve, all the versatrak fluid comes out. You can only get versatrak fluid at any GM dealership. Do not reuse old nasty versatrak fluid because that is why it got plugged up in the first place.

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Oct 11, 2014 | 2002 Buick Rendezvous

2 Answers

All well drive message on dash board " AWD disabled"


The problem is the AWD rear flow valve. Put drain pan under rear differential, unhook connector, unscrew flow valve bolt and pull it out. Reverse order to install. You will need to refill with 4 pints of versatrak fluid (unscrew fill plug) because when you remove the flow valve, all the versatrak fluid comes out. You can only get versatrak fluid at any GM dealership. Do not reuse old nasty versatrak fluid because that is why it got plugged up in the first place.

[img src="http://i.fixya.net/uploads/images/4c9bc0d6-7852-494f-be3d-ff1226269051.jpg" alt="4c9bc0d6-7852-494f-be3d-ff1226269051.jpg">
Posted on Nov 16, 2014

May 24, 2011 | 2005 Buick Rendezvous

1 Answer

The all wheel drive doesnt work only the front tires spin in the snow


The 08 Vues AWD system is very different than from previous models. The new Vues system is more like the technology on the Outlook. I' don't know detail on the hardware, but from a function standpoint there are two big differences:

1)The system is PREDICTIVE, not reactive. It does not wait for wheel-slip to make it engage. The system monitors throttle position, steering angle ect. and re-directs torque before wheel spin occurs.

2) The old system sent extra torque to the wheels that were slipping to boost traction. The new system sends power to the wheels that are gripping.

The result is a better, smoother system that will do a better job of keeping the Vue from getting stuck.

The old system was a single gerotor type AWD system. Essentially, a gerotor AWD system uses differences in rotating speed to spin a pump and apply pressure to clutchs. The single gerotor system used in the Vue essentially engaged and disengaged the rear axle when a differences in rotating speed occurred between the drive shaft and rear differential (indicating the front wheels were spinning faster the rears). From here on out, power goes into an open differential and was distributed accordingly (i.e. not very well).

GM also uses a twin gerotor system in the form of Versatrak. This operation in much the same manner, using a difference in rotating speed to spin up a pump and apply pressure to clutches, except the Versatrak system has a pump for each output axle. This allows the rear differential to act of each rear axle much in the way a limited slip differential does, better managing torque distribution.

The new system used in the Vue (as well as the Outlook, Acadia, and Enclave) is controlled by a microprocessor and operates by means of an electromagnetic clutch. It is very similar to the Haldex system marketed by Haldex Traction AB. The main difference being that Haldex still uses hydraulic pressure to apply the clutches, while the electromagnetic system used by GM (which I believe is developed by Borg Warner) uses electromagnetic force to apply the clutches. The operating principles are the same though. The new GM system is well integrated with stability control, traction control, and ABS. The system actively monitors vehicle dynamics and driver input to determine when to being engaging AWD before it is actually needed. With the ability to manipulate power delivery using AWD and stability control (by selectively applying brakes at each individual corner), the new Vue is very robust in terms of torque management. For all you folks in the snow belt, it should be dynamite in slippery conditions!

Hope this helps answer your question. Good luck and be safe on the snow.

Dec 12, 2009 | 2003 Saturn VUE

2 Answers

Awd disable light remains lit


Most common repair to solve the problem is replace flow valve on the rear differential and also replaced 4 pints of VersaTrak at the same time. (I'm a retired GM engineer.)

Nov 11, 2009 | 2006 Buick Rendezvous

1 Answer

How do you clean the egr valve on 99 pontiac montana


You would need to remove it and look into the passage that is covered in black soot. there is usually a little poppet that moves up and down to allow the exhaust gas to pass thru it, some are vacuum operated and some are electric. you can push the poppet open and scrape out the carbon with a little screw driver, generally they dont get all that pluged up on newer cars. I looked at a picture of yours at auto zone.com It appears yours is electrically actuated. If either the electric actuator or the position feedback in the valve are bad you would need to replace it. You could attempt to clean it and move the poppet up and down it could just be stuck

Jun 20, 2009 | 1999 Pontiac Montana

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