[moto22]

I think some guys are referring to different things here. From where I sit there are 2 issues - and this is how I have termed them:

1. "Bed Bounce" - meaning the bed shakes back and forth and the suspension begin a harmonic oscillation that occurs on evenly spaced concrete road expansion joints. This results in a herky-jerky ride that is, from reports, extremely annoying. I have not felt this yet but have not been on a road that would cause it. Obviously all beds have some independent movement between the cab and bed - but the inability of the chassis to handle spaced bumps without doing the pogo pogo is a problem.

2. "Chassis Harmonic" - This is the one I feel - which is a vibration that reverberates through the chassis AFTER a single bump has been absorbed by the suspension. This, to me, feels like a shock that has lost its rebound control - though I know that is probably not the cause.



Thus striking a single bump - which should result in a simple "bump" with full absorption by the shock - results in a bump and then a few more vibrations that oscillate through the chassis after the bump has been fully absorbed by the suspension.


This second version makes the truck feel less than solid - like the chassis is creating a harmonic anytime you hit a bump.



Some of you guys seem to think it is just a part of driving a truck with a stiff suspension. I don't mind a stiff suspension - or a firm feel to bumps - but harmonics AFTER a bump should have been fully absorbed is annoying and not just a symptom of a stiff suspension. I don't even consider the Tundra's suspension STIFF anyway - which makes it even more irritating since the suspension is soft enough to ride smoothly.



So why the harmonics after a bump? Is it a frame issue?