Drooping Frame Shakers?

[Edwards]

Crawling all over and under the new Ram and noticed that my frame shakers (active tuned mass modules) were tightened down less than level with one all the way down.

In this pic, there is one mounting bolt (center of shot) that goes all the way through it. You can see the black arms above allow ~30 degrees of movement tilting up or down. Every photo I've seen of these shows them mounted horizontal like this one. Anyone else notice theirs tightened down below horizontal? My drivers side was as far down as it could go. I'm not sure if it makes any difference how they sit, but I loosened the bolt, straightened them out, and tightened them back down.
I'll report back if my truck is super vibration free after this tweak.

 

[Jordan2929]

They should be at a 45º angle (the same angle as the cylinders) since its a 90º V8, the reason for this is to vibrate directly opposite of the pistons. Thus cancelling the vibration when it switches between V4 and V8 mode.

 

[syddog 2000]

They should be at a 45º angle (the same angle as the cylinders) since its a 90º V8, the reason for this is to vibrate directly opposite of the pistons. Thus cancelling the vibration when it switches between V4 and V8 mode.

This sounds perfectly logical to me. May I ask how you know this.

 

[VaderRebel]

This sounds perfectly logical to me. May I ask how you know this.

Don't ask, just nod politely and back away slowly, always nodding politely...

 

[syddog 2000]

Don't ask, just nod politely and back away slowly, always nodding politely...

My Bad, Sorry master.

 

[Jordan2929]

This sounds perfectly logical to me. May I ask how you know this.

lol, engineering major

 

[Neocane]

Don't ask, just nod politely and back away slowly, always nodding politely...

Lmao!

 

[RAM805]

I checked mine too and they are ~45º angle on chassis.

 

[Edwards]

They should be at a 45º angle (the same angle as the cylinders) since its a 90º V8, the reason for this is to vibrate directly opposite of the pistons. Thus cancelling the vibration when it switches between V4 and V8 mode.

Thanks. Very interesting. I still think mine were off in light of this. One was 45º but the other was laying flat against the frame and tightened there.

 

[syddog 2000]

Mine are drivers side at 45 degrees and passenger at 90 degrees. is this a problem? should I move them as Edwards did or a dealer issue. Or don't worry about it lol.

 

[Edwards]

I've now driven with then closer to 45º and at 90º and can't tell any difference so I'm not going to worry about it. It just looked odd when under there since every marketing photo has them at 90º.
In any case, it is not a dealer issue. Takes 4 minutes to do both with a 13mm wrench (I believe) and most of that time is getting on the floor and back up.

 

[syddog 2000]

I agree with the getting up off of the floor part. Lmao, it sucks getting old.

 

[19RamLimited]

My drivers side is 37 degrees and passenger 27 degrees. I don't even think 45 degrees is possible. My drivers looks maxed out at all the way down. Im looking on tech authority now. I have to stop looking for problems

 

[echristi]

I went and looked at mine and they are at different angles also. Maybe its intentional to get different vibrations? Or the best way to offset the vibrations has something to do with being slightly out of phase (like sound)?

 

[19RamLimited]

I looked all over tech authority. no discussion off the angle recommendation. It only says when replacing to look at the mark from previous and reinstall at that same mark.

 

[SpeedyV]

I went and looked at mine and they are at different angles also. Maybe its intentional to get different vibrations? Or the best way to offset the vibrations has something to do with being slightly out of phase (like sound)?

I was thinking this too...I would expect them to be sitting at different angles from each other (not mirrored, but perhaps one angular and one straight), and I would expect the software to automatically adjust the phase angle and distribute to the appropriate unit as needed to optimize vibration cancellation.

 

[Ramjack]

lol, engineering major

Does this mean you are still an engineering student?