massive vibrations.....

[ltdcrwnvic]

hello gentlemen, its been a long time but i finally found a couple of minutes to get on and check the site out. let me jump into it.
these vibrations that ive been noticing only happen when im on the freeway or when i go 50mph+. im haulin it on the freeway and while im on the gas its fine, its when i let go of the gas that the entire car starts vibrating like theres no 2morow. im guessing its my rear end. but why though? or is it something else? i put in the posi-trac about 8 months ago but even before then i remember that around the same speed it would start vibrating. so what do you gentlemen think it is? any info is appreciated and if its something bad, can i still drive like that or should i get to stepping?

[85crownHPP]

STOP DRIVING and check those driveshaft universal joints. Mine vibrated like a mother f'er when i let off the gas on the highway since two of the cups had no needle bearings in them at all.

[88MercWagon]

STOP DRIVING and check those driveshaft universal joints. Mine vibrated like a mother f'er when i let off the gas on the highway since two of the cups had no needle bearings in them at all.

+1. definately check the U-Joints before driving it again.

[Enigma]

+2 Yep, most likely u-joint time.

[Blaze86Vic]

+3, I think you got your answer.

[ltdcrwnvic]

thanx guys, first thing 2morow morning imma hit up checkers and buy them. i havent put these myself, is it an easy job? ive seen em and know where they're at but i havent replaced any. tools/special tools. how do i go about changing these

[Enigma]

how do i go about changing these

dude, google is your friend. So is a repair manual.
http://dodgeram.org/tech/repair/U_joint/repair.htm

[Blackened300a]

+4. Bad U-Joints. If they are good, then I recommend a driveshaft balance.