R/T transfer case - Dodge Durango Forum - Forums and Owners Club!
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Driveline Transmissions, Differentials, Axles, Bearings, etc. This forum covers the entire driveline from the Transmission to the wheel bearings!

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  #1  
Old 04-14-2015, 12:45 PM
RT D2 RT D2 is offline
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Default R/T transfer case

Does anyone know much about the 2 speed transfer case on the R/Ts? I have a few questions... and possibly very hair brained ideas.

It seems to me that the AWD system is ALWAYS engaged, not just automatically engaged when it slips... is this accurate? Also, does this system lock the center "differential" in the transfer case if it detects enough slippage? I'm just curious what kind of system it uses and if I could somehow tap into the control on that system?

Why you ask? Let me elaborate. One of my (very) few complaints was that I would have liked a true, selectable 4x4 system. If I could (cleanly) tap into these systems to set up a switch between RWD and AWD, that would be pretty ideal. A close second would be an ability to manually lock the AWD into a true 4x4. Being able to do both would just be the cat's.... well it would be nice. Any hope for this?

Lastly, I notice a little "N" with a button (?) next to it on the opposite side of the high/low knob for the AWD. I assume this is neutral on the transfer case??? Not that I need it, but how do you use it? The knob doesn't turn that far. I assume that key hole/button/whatever selects neutral?

Thanks in advance.
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Old 04-15-2015, 09:53 PM
SmokeShow01 SmokeShow01 is offline
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Hi, found this info on another forum...>>>

DESCRIPTION
The Select-TracŪ II is the MP3023 two-speed, on-demand, active four-wheel drive transfer case that provides optimum traction for a wide range of conditions, while maximizing driver convenience. When operating in 4WD Auto mode, this sophisticated system anticipates and prevents slip by redirecting torque as necessary.

For added traction capability when traversing steep grades, rough terrain or extremely poor traction surfaces, the transfer case includes a 4WD Low mode. This second speed gear multiplies engine torque 2.72 times and locks the clutch pack for maximum traction.

Electric shifting between 4WD AUTO and 4WD Low is effected with a console-mounted switch. A pushpin button is used to shift to Neutral mode.

The MP3023 transfer case provides the following benefits:


Active, on-demand four-wheel drive requires no driver input.
Instantly anticipates slip and preemptively redirects torque as needed.
Vehicle stability under all conditions because torque is constantly being transferred.
4WD Low operation mode provides an advantage over vehicles equipped with a single-speed all-wheel drive transfer case.
Electric shifting between 4WD Auto and 4WD Low provides smooth operation and improved NVH control compared to systems with mechanical linkage.
Enhanced traction and stability provided by the Traction Control and Electronic Stability Program (ESP) working in tandem with four-wheel-drive.
A robust design and sealing for reliability.
Maintenance-free.
A neutral mode permits flat towing.



OPERATING RANGES
Transfer case operating ranges are:

Operating positions: 4WD Auto – N – 4WD Low.

4WD Auto = Electronically controlled wet clutch for torque biasing.
N = Transfer case neutral for 4-wheel flat recreational towing.
4WD Low = Low range (2.72:1) part time mode.

The 4WD Low range is for off road use only. It is not for use on hard surface roads unless the road surface is wet, slippery, or covered by ice and snow.

The low range reduction gear system is operative in 4WD Low range only. This range is for extra pulling power in off road situations. Low range reduction ratio is 2.72:1.
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Old 04-21-2015, 12:39 PM
RT D2 RT D2 is offline
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Default

Sounds.... complicated. Guess I may have to do a little more digging, but it seems to me that what I'm trying to accomplish is not possible.

I wonder how well the Grand Cherokee transfer case would fit under a Durango....? Or better yet, the true 4x4 case out of a Ram. It's the same driveline otherwise...

I don't think I want to do this kind of major surgery on my new Durango. Unless anyone else has clever ideas, I think I'll leave well enough alone...
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