All-

I have heard that MDS was not in production until 2006, but were any trucks released in 2005 with it to your knowledge? How would you know? A guy I met at work commented on my truck, then tells me that he had also owned an 05 but sold it because he hated the MDS drone. I told him I thought it was only available on 06 and later. But how would you know if you have it or not aside from the "Drone". Are their indicators on the dash?

Just a question. Figured someone here would know for sure. Now I am questioning if mine has it! (smile)


Busa

The only indicator is the awful sound and all engine "smoothness" disappears when it cuts in. I disabled mine because it was not worth having IMO.As far as I know, it was not offered until 06.

Multi-Displacement System
From Wikipedia, the free encyclopedia
Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2004 on the 5.7 L modern Hemi V8. Like Mercedes-Benz's Active Cylinder Control, General Motors' Active Fuel Management, and Honda's Variable Cylinder Management, it deactivates four of the V8's cylinders when the throttle is closed.

The system was first offered only on passenger cars, since the heavy demands of trucks would interfere with its operation. However, it was recalibrated for 2006 and will be offered on all seven models, including SUV's and 1500 series trucks, using the 5.7 L engine.

Chrysler expects that the technology will boost economy by 10% to 20%. In the Jeep Grand Cherokee with MDS, highway fuel mileage for the V8 is the same as the V6 at 21 mpg (11.2 liters per 100 km).

In order to preserve the characteristic rumble of the V8 engines, Chrysler and Eberspaecher North America designed a special exhaust system for MDS-equipped vehicles. This includes four separate mufflers, two large central ones for V8 mode and two smaller ones near the tailpipes for straight-4 operation. Unlike the system used on Mercedes-Benz V12 engines, also designed by Eberspaecher, the system is mechanically passive.

Applications:

2005- Chrysler 300C
2005- Dodge Charger
2005- Dodge Magnum
2009- Dodge Challenger
2005- Jeep Grand Cherokee
2007- Chrysler Aspen
2006- Dodge Durango
2006- Dodge Ram (1500 only)
2006- Jeep Commander

So-

According to the Wikopedia....any of our trucks sporting the MDS will have four exhaust cans. Easy enough.
Maybe the guy was referring to the lull that resonates at certain RPMs. It was noticeable on mine from the factory, and even more so since I put my CatBack on. His truck probably didn't have MDS, he just thought it did.

THanks for the info-

Busa

Appreciate the responses.

They may of had 4 but I only have 2 on my 07 and I do have MDS.