When I get up to around 90 an let of the gas I get major vibrations through the whole car and not sure what it is. If I am only going 80 it doesn't do it or at least to where I can't notice as bad. Could it be bad brakes? It only happens when I let off the gas and not pushing the brakes.

 

Could it be drive shaft or U joint related??

 

I agree with that too, sounds like bad U-joints

 

Ya could be u joints since I have 113k miles on the car.

 

How do I replace the u joint?

 

If you have a stock driveshaft then those u joints are probably toast. You probably also dont want to drop your DS while driving so I could keep the speeds low until you get it fixed.

 

So I should just drive careful and when I have the money get a 4" driveshaft from shaft masters?

 

Stock DS is a two piece design. If your u joint failed your DS could drop to the ground and proceed to potentially cause substantial damage. I would get them checked ASAP then decide how to proceed.

My buddy had a u joint fail on his truck. It destroyed the entire rear end. It could have been worse. Get your car checked out and for gods sake don't drive it that fast.

 

Yes, get it checked out. U-joins are not all that bad to replace yourself if you have the time and tools to do it.

 

I can't seem to find replacement ones though?? From what I have seen you have to replace the entire shaft