Quadradrive II versus Quadratrac II - JeepForum.com
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post #1 of 49 Old 01-17-2012, 09:14 AM Thread Starter
diver110
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Quadradrive II versus Quadratrac II

I generally understand the difference, limited slip with QDII, but what I am not clear on is where that would make a difference. That is, where can you go with QDII that you could not with QTII? I have hunted around, but never gotten a clear answer. Thoughts?

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post #2 of 49 Old 01-17-2012, 09:23 AM
mattydipps
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yes the only difference is limited slip with QDII to the open slip with QTII

both will go just about anywhere you want to bring them the difference is i believe the quadradrive will perform better with less wheels on the ground then the quadratrac especially on an incline the QDII will push the truck with only having say two wheels on the ground faster, smoother, and with less strain than the QTII....

NOT saying you cant perform well with only 2-3 wheels on the ground with quadratrac, its the same with QTI vs QTII both will get you where you want to go .. just may take different steps to get there..

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post #3 of 49 Old 01-17-2012, 10:15 AM Thread Starter
diver110
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How much difference is there when both are in "low." The Jeep web site makes them almost sound the same.
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post #4 of 49 Old 01-17-2012, 10:23 AM
sk1er18
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There's quite a bit of difference when the lockers are engaged.... primarily for steep climbs.

I was giving jager a hard time this weekend while we were wheeling because I crawled right up a few climbs with my 2" lifted Xk with 31s that took him a few attempts with his 8" lifted WK with 33s to accomplish. The difference was that QD2 won't slow down/stop on the incline when a tire loses traction; whereas the time delay for QT2 to transfer power via the brakes does, which is a killer on steep climbs.

In the end though, they're both great systems and I wouldn't hesitate in the slightest to get a QT2 rig..... but if given the option, QD2 is worth it IMO.

-Matt
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post #5 of 49 Old 01-17-2012, 11:09 AM
99FormulaM6
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Quote:
Originally Posted by sk1er18 View Post
There's quite a bit of difference when the lockers are engaged.... primarily for steep climbs.

I was giving jager a hard time this weekend while we were wheeling because I crawled right up a few climbs with my 2" lifted Xk with 31s that took him a few attempts with his 8" lifted WK with 33s to accomplish. The difference was that QD2 won't slow down/stop on the incline when a tire loses traction; whereas the time delay for QT2 to transfer power via the brakes does, which is a killer on steep climbs.

In the end though, they're both great systems and I wouldn't hesitate in the slightest to get a QT2 rig..... but if given the option, QD2 is worth it IMO.
exactly my thoughts.

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post #6 of 49 Old 01-17-2012, 11:51 AM
modernblueWK
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The qd2 is much better than qt2. Its like having a stock rubicon jk vs a sahara jk with rear lsd only. On the road they are the same, on an icy, snowy road the qd2 might be better or more likely to get yourself Out of the ditch without help. For the mild trails that i choose to explore with my family in my stockish rig, qt2 has been great. Mostly 4lo for steep climbs and descents to save the brakes.

I have never stuck my jeep off road. My wife got it stuck on a 3' snow pile on main street. The tires dug in and it was sitting on its belly. I had to yank it off with my zr2. I dont know if qd2 would have unstuck that situation.it had 2 rear tires spinning on ice and both fronts in the air.

Sometimes an open diff in unskilled hand is safer than lsd. I would rather my wife lose traction in a straight line on road than slide both locked tires sideways and put herself off road.

I had a choice of qd2 on a limited vs qt2 on my laredo x when i got mine. I chose the qt2 for longevity and cost of repairs/ reliability in 10 years. Which is debatable i know.

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post #7 of 49 Old 01-17-2012, 12:20 PM
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This is what I understood when researching this back when I bought mine.QD2 is capable of putting power to all 4 wheels at the same time similar to air locker systems. I've been up steep loose dirt hills and seen it in action where all four tires are trying to get traction. That was also the first time I made it up the hill without needing a winch. To me it's the best factory off road system there is.

QT2 uses antilock brakes system to turn wheels, but not all wheels at the same time. It switches from right to left depending which has more traction. I seen one suck in a snow drift a few years ago and watched him try to get out of it. Seen the tires switching back and forth. That when I understood the difference.

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post #8 of 49 Old 01-17-2012, 01:37 PM
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Yeah the brake system will slow or stop a spinnig wheel on both systems i believe. Where the qd2 shines is with esp off and in 4lo. With esp off the lsd diffs will kick in more when needed and i believe in 4lo the lockers kick in. Im not sure if the brake limited slip system is disabled or reduced in 4lo. I know that my brake limited slip still works pretty aggressively In 4lo. Ive seen it lock the front left and rear right in mud and moved the jeep with just the other 2 wheels.
Its pretty cool. Definitely slower going than qd2 but i still got where i was going. I think a qt2 with good off road tires will beat a qd2 with street tires in most offroad situations.

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post #9 of 49 Old 01-17-2012, 03:22 PM
GoGadgetWK
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Originally Posted by modernblueWK View Post
Im not sure if the brake limited slip system is disabled or reduced in 4lo. I know that my brake limited slip still works pretty aggressively In 4lo. Ive seen it lock the front left and rear right in mud and moved the jeep with just the other 2 wheels. Its pretty cool. Definitely slower going than qd2 but i still got where i was going. I think a qt2 with good off road tires will beat a qd2 with street tires in most offroad situations.
Limited slip still works. From what I've seen. There's a computer that puts more power to wheels with traction and barely spins wheels off the ground. If no wheels have traction. It puts equal power to all of them.

Your right that off-road tires make a difference of how good system works. Ground clearance also matters for making a vehicle off road capable. Since they lowered WK from WJ to capability also lowered in off-road or deep snow situations. QD2 doesn't help if you gets high centered on every rock you try and go over.

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post #10 of 49 Old 01-17-2012, 06:29 PM Thread Starter
diver110
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Thanks for the additional feedback. A WK with QDII is not all that easy to find, it turns out.
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post #11 of 49 Old 01-17-2012, 06:34 PM
modernblueWK
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The computer stops or slows the spinning wheels which when combined with open diffs, sends power to the opposite wheel on that axle mechanically. Thats how it works in my qt2. This is the brake limited slip.

With the diff installed Limited slip units in qd2 i would think the brake limited slip system would get less abuse.

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post #12 of 49 Old 01-17-2012, 06:38 PM
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Read this: Jeep brake traction control explained. From the chrysler blog

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post #13 of 49 Old 01-17-2012, 06:49 PM
jager00
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Quote:
Originally Posted by sk1er18 View Post
There's quite a bit of difference when the lockers are engaged.... primarily for steep climbs.

I was giving jager a hard time this weekend while we were wheeling because I crawled right up a few climbs with my 2" lifted Xk with 31s that took him a few attempts with his 8" lifted WK with 33s to accomplish. The difference was that QD2 won't slow down/stop on the incline when a tire loses traction; whereas the time delay for QT2 to transfer power via the brakes does, which is a killer on steep climbs.

In the end though, they're both great systems and I wouldn't hesitate in the slightest to get a QT2 rig..... but if given the option, QD2 is worth it IMO.
i need a locker

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2005 WK 9" lift on 37's with all the goodies- regretfully sold :(
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post #14 of 49 Old 01-17-2012, 06:53 PM
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Quote:
Originally Posted by jager00 View Post
i need a locker
Get one......buy me one while you are at it....

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post #15 of 49 Old 01-17-2012, 06:58 PM
jager00
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Haha i dont even have enough money for my spare tire bro

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