45mph vibration

96stacked&smoken · Feb 23, 2012

iv had a 40 to 45 mph vibration in truck in sig for awhile now and was wondering what might be the culprit. doesnt do it at any other speeds. thanks.

Bugman · Feb 23, 2012

A few things to check. One is the balance of the tires the alignment. Also crawl under the truck and check the drive shaft to see if you can see if any of the balance weights have fallen off.

96stacked&smoken · Feb 23, 2012

i balanced the tires myself a couple weeks ago cause i was thinkin that. helped a lil but still does it. dont think its weight cause i painteed the shaft and theres no circle rust marks but il look again.lol could it be carrier bearing?

96stacked&smoken · Feb 23, 2012

how could it be alignment? i havent had that done since i bought it 4 years ago so it could be if the symptoms match

Pstroke96 · Feb 23, 2012

it could be allignment, how are the u joints? that can cause it as well

96stacked&smoken · Feb 23, 2012

they were fine the last time i checked and i replaced one 2 years ago. i think i might take it to work and check that stuff out. still curious how alignment could cause it. always up forr learnin new things.lol

Denver · Feb 23, 2012

I had this on my superduty. Rebuild the drive shaft with new u joints, carrier bearing, and balanced. No more vibration. I also think there is some type of harmonic balancer on mine that needed replacing.

96stacked&smoken · Feb 23, 2012

how much to get balanced? luckily i dont have the big harmonic balancer to deal with.lol

96stacked&smoken · Feb 24, 2012

well i found it does it most at 35. does it goin down the road in neutral or in gear

Pstroke96 · Feb 25, 2012

dumb question but, does it always do it in the same spot? or anywhere? there is a road in my town no matter what your driving between 35 and 40 the vehicle will shake,

basically, for the allignment if the toe is not set correctly, which is the most common issue in front end allignment, its the difference in distance between the fronts and rears of the tires. if the tires are to far toed in, the tires are trying to push in twards each other going down the road. the axle holds them going foreward so the tire is somewhat slid across the road which makes the tire flex causing a vibration. if they are toed out it will do the same thing but the tires will be trying to drive away from the truck instead of under it. how do your tires look? that is the best indication of an allignment issue

96stacked&smoken · Feb 25, 2012

does it everywere. o no there not scrubbing at all. tires look good. i set the toe when i replaced tie rods and the steering is great you can let go of the wheel and it goes strait for miles.lol could it be flywheel?

96stacked&smoken · Feb 27, 2012

Well i had the truck on the lift to rotate the tires and found my balljoints are going bad and my hubes a lil loose on one side. Could that be the problem?