Originally Posted by h3bubba79

I just changed the oil and filter to Mobile 1 full synthetic 5W-20. i just bought the vehicle from the dealer about a 2 months ago. it was at a chrysler dealership so i assumed they put the right oil in it, but changed it any way to be sure. we have a 06 Magnum R/T with MDS and it runs differently. So i have some experience with these new hemis. we have had the magnum since it was new in 06. i understand it is a can and this a 4x4 truck and it will run differently.

My main concern is the frequency at which it goes in and out. if it's a flay strectch of highway then it will never settle into MDS. it constantly switches in and out. when i get down hill it stays on and when i get on a slight incline it switches off no problem. seems to work as advertised.

It's that constant on/off that is wearing on my transmission. it already caused me to have to change the shift solenoid. after only 1000 miles after i bought it.

Question for you guy, when your MDS turns on, what happens on the RPMs? mine climbs about 200rpm and when tries to drop 300 as the converter tries to lock up. it locks up for about a second and then the MDS turns off. I can hear it in the exhaust, you are right, but it more pronounced in the shifting and the way it makes the tranny go "clunk" that bothers me. the exhaust is a crappy flowmaster one that looks like it was put together by a high school tech class.

Could this be a bad converter?

I turned the MDS off and the converter locks up fine. that's the way i have been driving it for a few days now and no lights. i rest the PCM and TCM too. no codes.