2006 CM870 vibration in floor 6th gear

[berrytrucking94]

(02-13-2018 )Pete379 Wrote:  Is it a steady vibration or does it pulsate. The reason I ask is that I’ve noticed all sorts of issues over the years both vibrations and grinding that could be attributed to ride height on peterbilts with air suspension. I had an 07 that would vibrate in the cab under load and only in high range it turned out to be running too high I had to adjust the ride height valve. It’s worth a shot to take a look...

It’s a pulsating vibration in the floor. If I rest my foot against the clutch while the truck is vabrating I can feel it very strongly on the clutch pedal so I’m thinking clutch related? Clutch has needed to be adjusted for a couple weeks now but didn’t seem that out of whack. I have yet to pop the inspection plate off to check everything out in there though