Harmonic vibration issue

JonnyUT

New Member
Hi- I have a 2015 Taco with 93K. Its got a 2 in lift and I have a small Four Wheel Drive Camper on it. It's developed a vibration around 40MPH and 65MPH that is very steady in that it comes and goes in a cadence that stays the same regardless of acceleration or deceleration. I have new tires on the truck - vibration did not change. I had the carrier bearing and u joints replaces and had the driveshaft rebalanced- no change in vibration. Does not act like a wheel bearing. I'm thinking transmission now (automatic)......any ideas?
Thanks, Jonny
 
Did you do the carrier bearing drop kit when you did the lift? Could be driveshaft alignment.
 
The source driving the harmonic vibs could be the tread pattern on the new rubber.

If you can, try a different set of tires with a different tread pattern.

Not likely the Transmission. If so, the vibration would have been present at the beginning. What has been changed on the truck? Driveline, suspension, lift, wheels, tires, springs........

You may need to tackle this by the process of elimination.
 
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