Shake of doom

[spoogie]

me again, my 2003 F 4X4 4.2 has the death shake about 40mph then gets better at 60 or so up to 175 or so. (speedo dead, might be +- 100 mph) I've had the tires balanced, front end checked and straightened out. It still shakes hard enough to make my Miller foam. What do I check now?

[Ultramagdan]

U joints can create a nasty vibration if frozen or just plain toast. Is this a stick or a automatic?

[spoogie]

Hm, it's a 5 speed.
You think a u-joint would come and go with speed?
It's another thing to check. Thanks for your help!

[papajoemrt]

Get down there and give your driveshaft a jerk or two.
Could the driveshaft be out of balance?
To check if your driveshaft is out of balance drive it into a pond, lake, or other body of water and when you salvage it from the depths your driveshaft will be balanced.

[spoogie]

What a idea! Water soaking! By God, I never thought of doing that, again!
Your just freaking amazing! That you for your wisdom and forsight.
Jay

[spoogie]

Just a follow up on the rolling earthquake. I layed under her a gave the shaft a good hard shaking, front and rear, and , as always, nothing moved. Any thoughts other then a good soaking? This should be easy for you guys. I mean it is a death shake then smooth as glass......???????

[KingRanchMan02]

If the tires were not rotated when they were balanced, then rotate them. If that doesn't help, them pull the drive shaft out and check the U-joints with the drive shaft out of the truck. They should move in all directions smoothly. Good luck!

[spoogie]

Thanks friend,
swapped tires front to rear after jacking the whole truck up on jack stands and running her in 4X4 and finding a shake in the left front wheel
which upon closer inspection found a bend in the rim. put it on the back, still some shake but at least it does'nt make your hands go numb.
Jay

[Joe Finn]

How in the world did they balance the tire and not find a bent rim?

[papajoemrt]

Of course I was kidding about the water soaking idea.

[spoogie]

Originally Posted by Joe Finn

How in the world did they balance the tire and not find a bent rim?

That is the million dollar question. Maybe it was a balanced wobble

[Ultramagdan]

You will want to replace that wheel. If it's shaking that much it can still cause a seal to blow out in the rear. Extreme, I know but still possible.

[papajoemrt]

A balanced wobble? is that even possible?

[Joe Finn]

Originally Posted by papajoemrt

A balanced wobble? is that even possible?

I suppose it's possible, but even the worst POS balancer will find a bent rim in about 2 seconds. Maybe they were bubble balanced?

[spoogie]

I dont know guys, just goes to show you that just cause sombody says somethings right, its not really is. Second guess everything, even from experts.
Jay