while I was under the new ram putting on some steps I noticed these things… I have no idea what they are. Are they a leftover from the assembly line or something? Theyre on both sides under where the front doors. I can’t see any wires or anything connected to them.
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WTH are these?
- Thread starter Gren71
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Rock Crawler
Ram Guru
Mass dampers. They are supposed to minimize vibrations.
Ha! Neat, i love learning something new
RAMs Vibrate To Stay Smooth While Saving Fuel. Here’s Why - AEC
Did you know that our RAM 1500 DT models use small modules that send vibrations into their frame to make it quieter? Why you ask? To save fuel! Okay, that sounds very complicated, but it’s actually pretty clever – let’s explain. With a growing niche in the European market and the all-time...
www.aecsolutions.com
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That article describes the active dampers. It’s not clear to me exactly how the passive dampers do anything special, except maybe absorb some vibrations. I have a truck without MDS, and mine has them as well.
Ye, it was just the first article i found that talked about the whole idea of them. Brand new concept to me from the jeep world…this whole “smooth ride” thing is fantastic lol
Darksteel165
Legendary member
Where exactly are those on your truck lol?
I want to see if I have the active ones.
I want to see if I have the active ones.
1BADRAMLIMITED
Ram Guru
He said he was installing running boards and from the picture it’s placed on the frame closer to the front. I believe I see the lower control arm in the picture.
Correct.
@Darksteel165 theyre bolted to the frame on both sides nearest the front LCA mounts. I HATE rust so the color bugs me arleady...but i dont know enough about the whole system and process of how they work (yet) and im just going to assume that painting the surface would change the harmonics or some such
Scram1500
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It's sacrificial metal, like zinc plates on a ship. Almost sounds right 
My 2017 4th Gen had these, there's a rubber bushing inside that isolates you from the frame vibration while the weight absorbs it. Modern steel frames don't flex like the old days and can end up vibrating like a guitar string. My pre covid 2020 5th gen has the whirly jigs
My 2017 4th Gen had these, there's a rubber bushing inside that isolates you from the frame vibration while the weight absorbs it. Modern steel frames don't flex like the old days and can end up vibrating like a guitar string. My pre covid 2020 5th gen has the whirly jigs
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maybe the difference is that I have the standard gas tank and you have the venti?
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Just going to set the record straight on mine. I don't have the big rubber dampers on either side. I have electronic modules both left and right (I just checked). I could have sworn I saw them a while back - must have been another truck I'm thinking about.
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So apparently I'm learning something today too. I decided to analyze all the 2024 build sheets (so far) to see what they say regarding damping. Here are the results.
Looks like, with a few unicorn exceptions:
Looks like, with a few unicorn exceptions:
- Pentastar gets nothing
- 5.7L Hemi gets a Passive Tuned Mass Damper
- 6.2L SRT gets Adaptive Damping
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Just checked my build sheet and it does list PASSIVE TUNED MASS DAMPER.
Checked again and it seems to be a plastic junction box. One of the outgoing bundles powers the driver side motor of the deployable side boards.
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