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Discussion Starter #1
Hi,

Has anyone been to a Jeep Jamboree with their Commander?

How important is 4WD LO?

I have the V6 Commander without LO and Jeep Jamboree is telling me that there are many trails that I cannot go on. I'm not talking about the Rubicon either. Just simple muddy trails. I want to understand the limitations of my Commander and why I would be excluded from some trails.

Thanks,

Gabe
 

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I think the 4-Lo rule is a rule they made so that they can exclude a lot of pulling stuck vehicles out. Our Commander may not always need it but it is easier to have one rule for all vehicles rather than limits for certain types of vehicles.
 

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Jeep Jamboree requires the vehicle to have 4-LO on all trails rated 3 and above. If you don't have 4-LO you can't go. This doesn't mean that your Commander isn't capable of doing some of those trails but it is just their rules.
 

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Discussion Starter #4
Followup:

Ok, correct me if I'm wrong about this. 4WD LO changes the gear ratio in the transfer case such that the wheels spin at a lower rpm for a given engine/trans rpm thus providing more torque at the wheels. For example, without out 4WD LO the engine may be at 1500RPM, trans in 2nd gear, and the wheels at 300RPM. With 4WD LO the wheels may be at 150 RPM for the same engine and trans conditions. And yes these are just bogus numbers that I pulled out of my head but they serve to illustrate the point.

So now to the off road cabablity part. Is it that without LO you are required to have the engine to be at a higher RPM to get the the appropriate place in the torque curve but this will cause the wheels to spin and dig you in to the mud? Or is there another advantage.

I understand where the extra torque of 4WD Lo would be helpful in towing, pulling and rock climbing. I'm just trying to understand the mud part.

Gabe
 

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4-LO locks the front and rear drive shafts so that they turn at the same speed. It also multiplies engine torque by 2.72:1
 

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Discussion Starter #7

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Don't beat yourself up over this. I actually loved my 3.7 XK. I got 4.7 because my dad didn't want to ship it, so I sold mine and bought his because it was easier to sell a 3.7 then a 4.7 at the time.
 

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You’re going to need low range for difficult and steep trails. Without a low range you will:

A) Have little control on a steep climb because 1st gear is just too high a ratio for the task at hand.

B) Overheat and/or overstress the transmission because the torque converter will be slipping massively to pull the hill.

C) You will have very little speed control on a downhill run because of 1st gear being far to high. You don't want a gear that allows the Jeep to do 25+ MPH when descending a steep grade because your life then depends 100% on brakes that can overheat and fail.

D) Cause body damage when crawling over rocks etc. What you end up doing is giving it gas ''a little more, more, more, more'' then the throttled up engine makes the tires spin sudden and fast, causing loss of control.

In a jamboree, it becomes a safety issue.

As for mud, you shouldn't need low range, but the jamboree rules might be in place because of their normal trail runs. Or... you will need to do a hard climb to get to the mudding place.
 

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Discussion Starter #10
So, has anyone ever heard of swapping out the transfer case on the V6 Commander to give it 4WD low?
 

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So, has anyone ever heard of swapping out the transfer case on the V6 Commander to give it 4WD low?
I think it might be much easier to just trade in the XK for one with a V8 and Quadra Trac II or Quadra Drive II. :eyemouth:
 

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Discussion Starter #12
I think it might be much easier to just trade in the XK for one with a V8 and Quadra Trac II or Quadra Drive II. :eyemouth:
I just bought it in December. I've already committed financial suicide enough times in my life. Not again.
 

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I just bought it in December. I've already committed financial suicide enough times in my life. Not again.
I'm thinking it's not feasible. Not only are there mechanical issues... the 3.7 has a different transmission of which the X-fer case mates up to that.

There's also electronic issues since the X-fer case is electronically shifted, and the NP-245 is used in both the QT II and QD II Commanders. It also has an electronic clutch pack which is controlled by the wheel sensors etc. to shift the engine torque to one axle or the other.
 
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