Vibration throughout whole truck....

Just going to run this by you guys real quick. Today I developed a vibration felt throughout the whole truck. Not in the steering wheel but in the seats. It kept getting worse the more I drove. Its only when i accelerate through 3rd all the way to 6th gear. Not felt in 1st or 2nd. I was thinking it could be the u-joints going bad. Or possibly the driveshaft became unbalanced somehow. I crawled under my truck and checked to see what kind of play there was in the U-joints. There was just a tiny bit of play and i really dont know if it is enough to be concerned with. Any ideas you all have will be great!

 

i have 0 i mean 0 play in my drive shafts. id also check the carrier bearing

 

Alright so zero i mean zero play is what we are looking for here? Also how would i check the carrier bearing?

 

i had a little play on a driveshaft in my old truck and it vibrated really bad. to check the bearing just see if there is play in it

 

Try greasing the u-joints (zerks)

 

Did that about a month or two ago but i guess it wouldnt hurt to do it again...

 

Check your tires, I had the same problem, turned out that i'd been ripping chunks out of my tires on grevel and i was feeling those ripped chucks vibrate the truck

 

Carrier bearing located at the rear of the trans?

 

Wouldnt you feel that in you steering wheel? Im in desperate need of new tires anyhow so i guess that could be an issue..... but im leaning more toward something to do with the driveshaft

 

also, you can tell if the vibration is going with the speed of the wheels. if you hear/feel the rotation faster than the wheels it could be the drive shaft. remember the drive shaft rotates 3.73x faster than the tires.

 

if the driveshaft is two pieces there is a bearing in between the shafts.

 

Thanks buddy, again the vibration is when i accelerate therefore that rules out anything to do with the tires correct?

 

i would think so. is there any play in the ujoint when you turn the driveshaft?

 

Slightly.... i mean just a hair of play... im thinking it may be on its way out the door and these are just the beginning signs. Ill take a better look at it tommorow when its light out

 

Well finally got my truck back after a week and a half at the dealership. Ended up replacing the whole driveshaft and also my front driverside hub assembly. Question is how often are you supposed to greeze the driveshaft? Feller at the dealership said i greezed my u-joint to often.. i only did it once every 4-6 months