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MACE
Dodge Dakota
6/13/2001
09:34:02
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 Subject: AWD-Which Wheel Gets The Torque
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Since New Venture Gear refuses to call back re: my questions on the 2001 AWD NV244HD Transfer Case, I'll ask here:
On dry pavement with plenty of traction during a nice sunny day, being in AWD, which wheel(s) get all the torque...which are being driven?
A bonus question or really verification...our system can apply torque to all 4 wheels, but if one wheel slips, it applies all torque to that wheel -vs- the Subaru system which can apply all torque to the wheel with the most traction, right?
FWIW, I do know when launching it (aka flooring it) from a stop light in the pouring rain, I get no wheels spinning at all, just pushed back into the driver's seat...wondering what the AWD with O/D off whould do at the track re: spinning the wheels -vs- another auto QC without the NV244HD...one would think the 1/4 mile times would be faster, no? Anyone have time slips to back this up?
Thanks...
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JP
Dodge Dakota
6/13/2001
14:48:15
| RE: AWD-Which Wheel Gets The Torque
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I also have a Dak with the AWD, if only for a few days so far. In my case I also have an LSD on the rear. As far as I know the Subaru (I also own a Legacy) will apply power to both front and rear axles under very slippery conditions, such as ice. The Subaru stops moving forward when one wheel on each axle spins. The Jeep GC with Quad drive (my wife's vehicle) has the best AWD system that I know of. It can move up to 100% of the power to any combination of wheels with traction, even if only one. Our Daks, in AWD mode do transmit power to all wheels unless cornering or there is a break in traction. We can get traction spilt to front and rear under low traction conditions by locking the transfer case in 4 Hi or 4 Lo. We can get closer to the Jeep by having an LSD on the rear diff. I will be looking for an LSD for the front but have not started that. The device that allows the Jeep GC to work so well is the Dana Hyra-lok system. (www.dana.com/news/picturepages/hydra.htm) That would be my preferred option at the differentials on the Dak. You can climb a wall with those!
Hope that helps and maybe others have a better way of putting it.
JP
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MACE
Dodge Dakota
6/13/2001
15:13:32
| RE: AWD-Which Wheel Gets The Torque
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I also have Limited Slip with my AWD NV244HD Transer Case.
I was under the impression that there is no full time torque sharing, say a 60 rear/40 split, that under normal conditions, only 1 wheel is being driven, yet, under certain conditions, all wheels can have torque applied with a big gottcha: if one wheel loses traction, then all torque is applied to that wheel, possibly promoting that wheel to just spin more with no other wheel getting traction, and you getting stuck while in AWD.
I'm fully aware of 4HI and 4LO, I'm more interested in learning the AWD system's limitations so I can adjust my driving habits to those limitations ('tis better to be in 4HI than get stuck and go to 4HI to regain traction)
Thanks...
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Mar
Dodge Dakota
6/14/2001
11:11:00
| RE: AWD-Which Wheel Gets The Torque
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In the dodge awd system when you are driving on drypavment straite all the wheels get power. The diffrence in AWD and 4HI is like having a Locked Rear diffrential. In awd if you were driving up a hill and the front tires hit somthing slipery the fronts would stop spinning and only the rear would. IF you had it in 4HI the fronts would still spin as would the back because you locked the transfer case. The reason you cant use 4hi on dry surface is that when ever the front tires a spinning slower then the rear say in a turn. The tires traction is two great and might break the drive train in AWD the front and rear are indipendent and it doesnt matter if the front is slower then the rear.
One more thing this system is not like subaru where it gives power to the wheel with traction. The rear is a Limited slip so both get traction but the front is like normal and the wheel with less traction will spinn.
See ya.
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surferpug
Dodge Dakota
6/15/2001
00:25:31
| RE: AWD-Which Wheel Gets The Torque
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Too bad we can't get the Quadra-Trac System on our Dodges. There a really awesome unit, I had them on my GC, three lockers I think.
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MACE
Dodge Dakota
6/15/2001
11:52:31
| RE: AWD-Which Wheel Gets The Torque
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Message:
I don't think the AWD NV244HD TC gives all wheels the same amount of torque when driving on dry pavement with plenty of traction...I believe only the right rear or pax side gets the torque (we do indeed NOT have any type of full time 60/40 split type of torque)
Also limited slip is a option, even with AWD.
I do agree the the wheel with the least amount of traction will get all the torque applied, and in some cases, just spin faster...
Yes, I think the DAKs could use a better AWD system, something better than the current open center diff...howver, no complaints so far with my driving experience in the pouring rain...its the other jerks with SUVs who think their god, that you have to watch out for!
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JP
Dodge Dakota
6/15/2001
19:38:52
| RE: AWD-Which Wheel Gets The Torque
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Message:
Surferpug, The Jeep system you are referring to is the same one I was talking about on my 6/13 post. Indeed it does have 3 Dana Hydra-Lok units with one integrated into the transfer case. I would settle for getting units in the front and rear differentials at this time.
It is an interesting question about torque split with all tires having traction for our AWD. Seems to me that an open differential has a bias to one side or the other. I may do some experimenting on a gravel road when I get a chance.
JP
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lil red dak
Dodge Dakota
6/17/2001
10:33:07
| RE: AWD-Which Wheel Gets The Torque
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a true awd system has 25% of the available torque fed to each wheel. Anything else is 4 wheel drive.
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MACE
Dodge Dakota
6/17/2001
12:08:48
| RE: AWD-Which Wheel Gets The Torque
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Even though our transfer case is labled as AWD, I belive the 2001 system is not a true AWD and giving some split of torque full time, it isn't really full time 4WD either...still thinking only the right rear wheel gets all the torque on dry pavement in AWD...again, sure works well in the rain (have toyed with stop light launches in the pouring rain, full throtle)
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Mar
Dodge Dakota
6/20/2001
15:45:46
| RE: AWD-Which Wheel Gets The Torque
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Message:
It can't just be the right rear. The transfer case can only send power to the front or back. After that its the diffrentials that do the rest. If you have Limited slip both back get power at all times unless back is slipping and the front is split 50/50 until one tire starts slipping.
A true AWD Like subaru (GARBAGE) would have sensers that direct power. WE DONT.
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MACE
Dodge Dakota
6/22/2001
10:04:55
| RE: AWD-Which Wheel Gets The Torque
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Message:
Doesn't our limited slip only provide power to both rear wheels when it senses the right rear slipping...most LSD systems I know about do not give full time power to the rear axle, at all times.
With our open center diff, I believe only the right rear gets the torque, when in AWD and you have plenty of traction.
BTW, I disagree...the Subaru AWD system is great...had two Subarus with it...I wish our DAKs gave more torque to the wheels with traction instead of torque to the wheel with the most spin AND we had a full time torque split, like the Subaru (go ahead and say it, I am indeed praising a Japanese manufactured vehicle!)
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Dan Gruber
Gen III
6/22/2001
17:36:53
| RE: AWD-Which Wheel Gets The Torque
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Just a comment on AWD...
AM General Hummers have a full-time AWD setup with open diffs, yet they are one of the best off-roaders out there. What's the secret? It's called the brake pedal. Hummers will go anywhere if you drive with two feet. When a wheel starts to spin, gently apply the brakes while continuing to feed it gas. That will slow down the spinning wheel and keep torque going to all wheels. Then when the situation allows, lock it in 4HI or 4LOW and go. I would imagine the same applies to AWD Dakotas.
Dan
2000 CC SLT 4.7 4X4 Auto 3.55 LSD
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Phillip Allen
Dodge Dakota
6/25/2001
14:32:26
| RE: AWD-Which Wheel Gets The Torque
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It is a full-time system not AWD.........as for the Hummer it's four-wheel drive system automatically brakes the tire that is slipping. There is no need to drive with 2 feet. The Dakota will not benifit from that, it will just slow you down and possibly lead to getting stuck.
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Dan Gruber
Gen III
6/25/2001
19:08:32
| RE: AWD-Which Wheel Gets The Torque
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The Hummers that I've driven didn't do it automatically, but then I've never driven the civilian version. And lets face it...with that GM diesel under the hood, wheelspin was never a problem anyway.
Dan
2000 CC SLT 4.7 4X4 Auto 3.55 LSD
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Phillip Allen
Dodge Dakota
6/25/2001
23:48:01
|  RE: AWD-Which Wheel Gets The Torque
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Yeah you got that right about the diesel! LOL
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