Pulsating vibration

[WhiteLighting]

I recently installed a Supreme Suspension 2.5 front and 1 in the rear with the differential drop and I’ve had it aligned but I get a pulsating vibration it only happens between 40 and 50 mph does anybody know what this could be? I feel it in my peddles mostly and faintly in my steering wheel.

 

[Tyler]

Your lift is not that high so I don’t think it would be the driveshaft angle. The needle bearing in the front diff is often associated with vibration like this.

@Mr. Nobody @ShikyoX @WarFabArmor - what do you guys think?

 

[ShikyoX]

I recently installed a Supreme Suspension 2.5 front and 1 in the rear with the differential drop and I’ve had it aligned but I get a pulsating vibration it only happens between 40 and 50 mph does anybody know what this could be? I feel it in my peddles mostly and faintly in my steering wheel.

Since you recently installed the lift
Did you notice this vibration prior?
If not did you or the shop shim the rear proper for driveshaft angle ?
Does it only happen in that speed range?
Deos it get quite or louder at certain points ?

Side note u would recommend removal of the diff drop they are not worth it

 

[Mr. Nobody]

I would certainly consider the alignment maybe an issue, as well as the balance of your wheels and tires. It's not very common to throw a lift on a truck and have a major vibration that's actually caused by something from the lift. Usually it's something accessory to the lift like the alignment. So I wouldn't start ripping the lift off the truck just yet, I'd start trying to rule out smaller things first.

 

[Tyler]

I would certainly consider the alignment maybe an issue, as well as the balance of your wheels and tires. It's not very common to throw a lift on a truck and have a major vibration that's actually caused by something from the lift. Usually it's something accessory to the lift like the alignment. So I wouldn't start ripping the lift off the truck just yet, I'd start trying to rule out smaller things first.

Wheel balance sounds like a good thing to look into since you believe the alignment was done correctly already. I didn’t even think of that.