V8 Hemi Vibration

[Fabjpdspeed]

Have those of you with the Hemi V8 that live in colder climates noticed an increase in engine vibration when the cylinders deactivate and the engine runs in 4 cylinder mode? I'm only noticing it when it's cold and I'm curious if that's coincidence and there's something wrong or if the cold weather stiffens the active engine mounts thereby transmitting vibration into the chassis and steering wheel. Thoughts?

 

[Jake22]

MDS shudder's been an issue since it's inception

 

[Fabjpdspeed]

Zero "shudder's" (whatever that means) for the first 7,000 miles. MDS has been imperceptible. This is only occurring when it's cold outside. Curious if anyone is experiencing similar vibration during cylinder deactivation. Thanks in advance for helpful posts.

 

[Jake22]

"Shudder's a known issue caused by the MDS & TCC (torque converter control) activating at the same time. We are aware of the widely reported problem but have no resolution available."

 

[j98cherokee]

I get the same shudder but it’s not just when cold. Uphill at very little throttle it even gives a bit of a spark knock sound. Pretty annoying but oh well.

 

[Jake22]

I get the same shudder but it’s not just when cold. Uphill at very little throttle it even gives a bit of a spark knock sound. Pretty annoying but oh well.

Hemi MDS is flawed engineering created in the "Daimler era" to reduce Corporate Average Fuel Economy.