Join Date: Sep 2003
Location: High Point, NC
Feedback Score: 0 reviews
I don't think there's any question but that the MDX SH-AWD system is superior to the VTM-4 system. That being said, the VTM-4 system is very capable.
I wish that were true but can find nothing in writing to prove this. If it is more than front wheel drive ,with traction control, at speeds greater than 18mph I wish someone would provide evidence. There is a lot to like about the Pilot and Ridgeline.
uuWhen DrivinguVTM (Variable Torque Management)-4r System*
VTM (Variable Torque Management)-4r System*
Senses a traction loss caused by a road condition change, and automatically
transfers some power to the rear wheels.
Use the VTM-4r LOCK to increase more torque to the rear wheels.
1. Stop your vehicle with the engine running.
2. Move the shift lever to (1, (2, or (R.
3. Press the VTM-4r LOCK button.
u The indicator in the button comes on.
Any of the following disengages the VTM-4r LOCK:
Pressing the VTM-4r LOCK button again.
Moving the shift lever to (D or (d.
Turning the ignition switch to the LOCK (0 position.
■To Engage the VTM-4r LOCK
■To Disengage the VTM-4r LOCK
1VTM (Variable Torque Management)-4r System*
Do not continuously spin the front tires of your
vehicle. Continuously spinning the front tires can
cause transmission or rear differential damage.
1To Engage the VTM-4r LOCK
Do not use the VTM-4r LOCK button on dry, paved
roads. Driving on dry, paved roads with VTM-4r
LOCK on may damage the rear differential when
making a turn. Strange noise and vibration can also
The VTM-4r LOCK can be used to help free your
vehicle from being stuck in mud, sand, or gravel.
When the lock is engaged, apply light pressure to the
When more torque is applied, the rear tires are not
likely to spin. This is normal.
If you are not able to free the vehicle, stop and
As soon as this feature is no longer needed,
disengage the VTM-4r LOCK.
1To Disengage the VTM-4r LOCK
The VTM-4r LOCK temporarily disengages when the
vehicle speed exceeds 18 mph (30 km/h). The
indicator in the button remains on.
* Not available on all models
I think that's a reasonable analysis. I believe you'll find the VTM-4 system quite capable in those conditions. For the record, SH-AWD can send power side to side as well as front to rear. VTM-4 can only send power front to rear as needed. In practice, there may not be much of a functional difference in most normal driving conditions.
One other thing that might be a concern for you is that Honda included VCM with 4wd models beginning in 2009. Personally, I am not a fan of VCM.
The SH-AWD system only sends power "side to side" when accelerating the outer wheel, while providing no power to the inner.
Great for spirited driving, but zero extra help in most low traction situations.
The VTM-4 can "send power" (really bad wording) to either rear wheel independently. (except when used in lock mode)
Honda claims the new Pilot's VTM-4 system can send power side to side. I'm looking forward to the details on how it works.
Why not make it a two speed transfercase? But the new shape looks like a crossover hence AWD.
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Yes. I believe it's called iVTM-4. Sounds like a nice improvement over VTM-4. And it's supposed to be able to handle more power than the current VTM-4 system too.
I do not know of anyway for the current VTM-4 system to send power to only one side or the other as it is currently implemented. Both left and right clutches are powered together. There is no independent logic to decide to send more power to one side than the other to my knowledge.
How would powering one side instead of both make any real difference?
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