Hello everyone,

I am at my wits end chasing this vibration problem. In my truck I have what I would describe as High frequency vibrations. They start around 60 get worse until 65, then get better until 70 then get way worse there after. It feels like I am driving over rumble strips however I am not. I have tried many things to remedy this and some of these things really helped but I still get the problem above (it was worse). Also, i am confident it is speed related and not engine related. I feel the vibration in the seat, gas pedal, and slightly in the steering wheel.

I have done the following:
- New transmission (unrelated to this but thought I would add it to rule it out)
- New driveshaft (including u-joints)
- New front and rear suspention
- New tires
-New front rotors and CV axels

 

If you are sure your tires/wheels are balanced correctly and don't have a bent wheel, I suspect maybe something in the rear brakes. I had a problem with my 08 when the rear rotors would get rusty where the parking brake shoes push against when applied. The vibration would start sometimes when the rear tires would hit a bump or a rise in the road like when you would start to drive over a bridge. If you have an infrared temperature gun, take your truck for a ride and when you get done with your test drive check the brake temperatures on the rotors and see if they are way different from one another.

 

Without looking at your truck, everyone is just guessing.

Get a code reader, and see if there are any misfires. Broken motor mounts also cause vibrations.