Planning to buy an '06, 2500 with auto and the 5.7. Have there been any noted reliability probs with the MDS( i.e. locking into a 4 cyl mode or other strange abnormalities) and Automatic transmission probs with the 5 speed?? Thanks

 

not that i've ever heard of...and with the 2500...i dont think they made them with mds...I could be wrong on that. but hey i've racked up over 116,000 miles on my 06 1500 hemi 4x4....still strong as ever

 

I think you need to do a little better research before you buy a vehicle, any vehicle. The 2500s do not have MDS, and even though I'm not a big fan of MDS, I've not heard of a single issue with it, short of an annoying drone with some aftermarket exhausts...

 

yup no mds on the 2500's.. the 545rfes (the 5 speed) seem to hold up ok to normal driving.. if a truck has been driven hard it would be something to be concerned with.

 

Thanks for the inputs. My research shows that the '08/'09 2500 has MDS; so from your inputs assume only '06 &7 '07 2500s were non MDS .

 

Might want to check them old sources out again there 'oldvee. The '08 2500 Hemi engine was unchanged from previouse years did not have the MDS feature. The only change to the '09 version is adding variable valve timing and an increase to 383 HP and 404 lb./ft. of Torque, still no MDS...

 

No MDS on Megacabs or 2500's. It's not great anyways. Actually doggy, slower shifting and annoying to say the least. MDS failures would default to all 8cyl since the ecu has to supply the power needed to activate the mds.

 

The 09 hemi's uses VCT variable cam timing not VVT variable valve timing...two different technologies. I'm still learning about it but from what I gather there's yet another valve that uses oil pressure...but this time the pressure goes to a cam sprocket that has some sort of phasing sensor which pulls/adds timing based on the oil pressure from the valve. Damn technologies..

 

Interestingly, on the MDS 1500 series Hemi, Dodge uses the term Variable Cam Timing. While on the specs for the non-MDS 2500 series Hemi, Dodge uses the term Variable Valve Timing. Hence why I called it VVT, since we were talking about the 2500.

http://www.dodge.com/en/2009/ram_150...ty/powertrain/

http://www.dodge.com/en/2009/ram_250...ty/powertrain/

 

They are speaking about the same thing. It even states VVT right next to where they say cam. They goofed