Between 2100-2500 rpms when crusing on the highway there is a vibration that can be felt in the truck, but mostly through the pedals and the steering wheel. There's no noise with it, just an annoying vibration that will irritate the hell out of you. I must get rid of it!!! How

 

Maybe a tire out of balance or the famous Exhaust vibration?

 

bent driveshaft? well that would probably do it at any rpm, but its just a thought...

 

I just had the tires balanced a couple weeks prior to this vibration, it may be the exhaust.....and I have a 99 with the steel driveshaft, and I've never run on slicks, could it still bend?

 

Hit anything by chance?

 

Nope, nothing, I'm gonna get my driveshaft reblanced or rotated, whatever you call it. And see if that does it, if not another alignment at a different shop....Then I'll move on to the exhaust, and probably end up buying something else, I have the Borla Catback now, and want louder.

 

838

My former 99 had the same thing.. approx 75 to 85 mph.

Changed to an aluminum driveshaft, went away.

Keep the steel unit if you run drag radials/slicks w/out traction bars.

Bob

 

2001's and up also have this issue around 90 mph. It has to do with the exhaust from what I've seen.

 

lightning#838

You said you had balance done PRIOR to vibration, could a weight have come off a wheel? Just a thought.

 

See NOSTROMO',(SP?) post for help:

https://www.f150online.com/forums/sh...aust+vibration

Dan

 

Thanks Dan! I bet you its the pinion angle. I just had the truck lowered not too long ago. NOSTROMO said that i need shims in between the leaf spring and the axle, can anoyone give me info on this.

 

I did a 'search' on "shims":

https://www.f150online.com/forums/sh...ighlight=shims

There's more info using the 'search' feature..........

Dan