thanks man... i know i have a warped drum because the parking brake wasnt releasing on the drivers side so i know that didnt help... but it was a reallly rough vibrate... almost shaking... every so often it comes and goes but its hard to tell what i do when it happens.... it happens just randomly to my awareness... its an old truck.... im just gonna drive it till i get a new car...

 

Have you checked the front rotors?

 

My guess is that the front tires are out of alignment or out of balance. My Grandfathers old dump truck shakes the hell out of you above 35 mph.All I can say is get the truck checked out by a good mechanic and not some dumb ass.

 

i havent checked the front rotors... so far the problem has gone away but the whole truck shakes like crazy when im accelerating arund 40-45 mph... after that... it goes away... ive triedto see if it was just in 4th gear but its not... its in 3rd and 5th... i just had my tires rotated and balanced... but i have noticed... when i have someone else in the truck... i dont notice it as much....

 

I would say the problem is your tires then. Normally if the rotor is warped you only get a vibration under braking. Its possible that your tires are out of round and are going to vibrate no matter how many times you have them balanced.
If the tires are fairly new, I would go back to where you bought them and see if you can get them replaced. Have the service tech ride with you so that he/she can feel the vibration.
If the tires are kinda old, just replace them.

 

but if it was the tires then wouldnt it do it all the time? this only happens when i push the gas pedal down... comes in from 40- 45 mph or so...

 

If it does it at a certain speed, it could be a tire. However, now that you say it does it when you step on the gas, Im thinking maybe its a driveshaft u-joint.

 

how can i tell if its a u joint? what do i look for and where? (sorry.. im a newb at working on my truck)

 

thats wat it is then! a little while back, i was under there and was able to just keep spining the front drive shaft and it was goin right around no problem... is that wat you are referring to? or the rear driveshaft? that one doesnt move very much at all... barely 1/4 inch... thats when ive got in gear... never tried it out of gear...

 

We are talking about the rear driveshaft. If you can move it a 1/4" that might be where you problem is. You really shouldnt be able to move it at all.

 

what would i have to do to get it fixed?

 

Replace the universal joints on the driveshaft. Before you swap out the parts, I would have a mechanic whom you trust look at it.
I would hate to see you spend the money for new u-joints and only to find thats not where the issue is.

 

ok ill have my mechanic take a look at it... im assuming they are going to be pretty expensive?


edit: by the way... i greased up the brackets on the shaft that connect to the tranny... it made the vibrations subside by a little bit for only about 15 miles...

 

hey guys... back again and i am almost positive i found out what is making this annoying vibration... on my pass. side rear tire, there is an indent in the side just before it starts to curve to the top where the tread is... i havnt checked the other tires but im thinking that is what it is.. idk if this will make my tires go bad faster or not... i have been trying to wear them down though so i can get new ones... the ones on there sVck right now.

 

sorry for late reply, but it seems like a bad u joint...