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Purchased a used Jeep Commander 7 passenger, 88,500, 3.7 v6, 4x4 sport last month. Since I have no lever to engage the 4x4, how does it work? I don't know if I have a QT I, II, or III. Does the car have a timing chain or belt?
 

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@slabadie, you have QTI, which is a full-time 4WD system. You do not have the ability to shift into 4LO.
 

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What are the plus (+) and minus (-) buttons for on the console?
I'm guessing you mean on the center console at the bottom of the gear shift??? That is the "manual" gear select. Don't remember the name Jeep has for it, but you can select a specific gear to stay in and what not. Minus goes down, plus good up. The gears go from 1-5.
 

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The gears go from 1-5.
Interestingly enough when i went to the dealer for the trans final drive recall/reprogram, i now dont ever see the display go to 5 anymore, it goes right from 4 to D. The dealer assures me it is going into 5th, but my mileage disagrees.
I saw someone else say that recently and I thought it was weird. On my older Jeep's "D" let the transmission go through all gears and then get into overdrive, while as manually selecting gears did not. mine definitely goes 1-5 and then I feel/see an rpm drop if I go from 5 to D.
 

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4 or 5

Interestingly enough when i went to the dealer for the trans final drive recall/reprogram, i now dont ever see the display go to 5 anymore, it goes right from 4 to D. The dealer assures me it is going into 5th, but my mileage disagrees.
My 2006, when you hit the ( - ) on the gear selector, goes from D to 4.
My 2007, when you hit the ( - ) on the gear selector, goes from D to 5.

Not sure if this is something computer programming, but i'm about positive they are both the same transmission and there is nothing wrong. While counting gears during acceleration, they both go through all 5. 5th usually waits until its been at highway speeds for a while, used to have a Durango that did the same.

I hope you get to enjoy some 4x4ing. It's a necessary part of life :)
 

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The + and - are not buttons as they look, to go + or - move the gear shift lever sideways in the direction toward the + or - indicator to shift up or down. It will only shift when the speed and engine RPM are in safe limits so it will not harm the drive train.
 

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Purchased a used Jeep Commander 7 passenger, 88,500, 3.7 v6, 4x4 sport last month. Since I have no lever to engage the 4x4, how does it work? I don't know if I have a QT I, II, or III. Does the car have a timing chain or belt?
@slabadie ;

You have QT-I which full-time 4WD; you have the NV140 transfer case, which is a single speed transfer case, meaning you do not have the capability of dropping down into 4-LOW; You're in 4-HIGH all the time.

Conversely, you don't have the ability to come out of 4-HIGH ever - meaning you don't have the ability to switch between 2WD or 4WD either.

Here is everything you need to know about identifying your Commander's 4WD system;

This Picture is a good indicator of what 4WD system you have:




If you have a Commander that says 4x4 on the rear hatch door and you don't have a chrome T-Handle like the one circled in blue, you have the Quadra-Trac I full time 4WD system.

Keep in mind, all three of the Commanders 4WD systems also come with the additional features of 4 wheel traction control and electronic stability control, so even the Quadra-Trac I 4WD system is quite capable when off-roading or trail riding.

If you do have the Chrome T-Handle but you don't have the Quadra-Drive II Badge circled in red then you have the Quadra-Trac II 4WD system.

If you have the Chrome T-Handle and the Quadra-Drive II Badge, obviously you have the Quadra-Drive II 4WD System.

Other ways to tell is by looking at the rear differential cover; Quadra-Drive II will have 12 bolts; Quadra-Trac I & II will only have 10 bolts. Here is a pic of my rear differential cover - I have Quadra-Trac II and as you can see there are only 10 bolts (2 hidden by a cross member)




The biggest differences between Quadra-Trac I and Quadra-Trac II;

Quadra-Trac I Commanders use the NV140 transfer case which is a 1 speed transfer case and not 4-LOW capable.

Quadra-Trac II and Quadra-Drive II 4WD systems both use the NV245 transfer case which is a 2 speed transfer case that is capable of dropping down into 4-LOW.

Quadra-Drive II offers the additional capability of ELSDs (Electronic Limited Slip Differentials).

To answer your other question - I'm pretty sure you have a timing chain, not a timing belt.
 

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As others have said, if you don't have the T-Handle, you've got the QT-I system. As far as how it works, it just does its thing, works the same as the other systems, you just don't have the added benefit of 4-Low found in the QT-II or the electronic limited slip differentials which come with the QD-II.

The 3.7 is equipped with timing chains.
 
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