Vibration?

[starved 4 fuel]

I have a 2001 powerstroke that has a terrible shimmy, vibration from take off to around 20 mph. This thing will shake the gauges out of the dash if you acellarate at a moderate level from 0-20 mph, after that no problems. What might be the problem? The truck just got a new trans in it today along with a new carrier bearing. This vibration was present before the tranny and carrier bearing upgrade. What could possibly bringing me the vibration?

 

[fgtex]

Has the alignment been checked recently? Balance and rotate tires? This is a possibility.

Edit: Let us knwo more about your truck...auto vs manual, 4x4 vs 4x2, etc...

fgtex

 

[starved 4 fuel]

alignment

Yes, I just installed a pro comp 4' lift kit and pro comp 35's. The truck is a 2001 superduty crew cab diesel. I also installed a suncoast trans. The problem was there b4 I installed any of the above. It is really weird. When you are at a dead stop and mash on it the truck really shakes. If you stand on it while rolling 20mph and up there is no trouble. I am wondering if my rear end or if something else in the drive train could be giving me this problem. Even when moderately accellerating from 0 to 20 mph the truck really shakes, after 20 no troubles?

 

[bad_bad_bubba]

This is just off the top of my head and from a little experience but check your motor mounts. You might have one broke.

 

[starved 4 fuel]

Motor Mount

That would be cool. I will check it out. Thanks. What do you need to do to make a 7.3 run like a scalded dog?

 

[Lord Tauk]

How long has this been happening?

Just adding some more thoughts;
Make sure everything (fastener wise) is tight underneath, suspension components mainly.

Before you installed the lift and the bigger tires, it was still there.. that's interesting, I was definently going to say to have the same shop or someone else reputable recheck your tires.. is there a way that both sets before and after were unbalanced?

Your obviously getting vibes from something, I'd go along with checking your allignment too.

 

[driveboosted]

U-joints?..... carrier bearing.....

 

[JLDickmon]

U-joints or driveline angle (not supposed to exceed 5*) would be my guess..

halfs of the driveshaft out of phase maybe...

 

[DaveBen]

If the driveshaft is out of phase by 180°, that is out by 1/2 turn, it will vibrate. The way to check this it to remove the drive shalf and turn the drive shaft 180° on the rear end yoke, reinstall it, and drive it. This usually cures this vibration.

Dave

 

[starved 4 fuel]

vibes

Thanks alot guys tommorrow morning I will be working on the truck. I will let you know what I come up with for the fix.