All of a sudden there is a shake when the car reaches 85 km/hour and goes away after 100. The shake seems to be coming from the rear as there is no vibration in the steering it is almost like the rear is hopping. I read a few posts and one said that there was a broken strap on the drivers rear. I’m not sure what a strap is. Can anyone help?

 

have u taken a look under your car and checked anything that could seem out of the ordinary? (struts, springs control arms, balljoints, etc...)

 

I have no idea what a strap is as well. Get the suspension checked over by a mechanic to determine if anything is out of the ordinary. This is something you don't want to deal with breaking/failing on you when you are going that fast.

 

I took it out again and this time I lowered the mirrors so I could see the rear tires. I noticed the left side was hopping. I went under the car and noticed the strut was wet at the bottom so I decided that was the problem. I went to remove it and of course the lower bolt was seized so I decided to remove the lower arm and of course the bolts broke. I eventually grinded and hacked the welded nuts off and got the lower arm removed. The bolts were seized in the bushings. I heated up the sleeves a little and removed them from the rubber, then I heated the steel up cherry and removed the broken bolts. I heated the sleeves back up and put them back in the bushings. I siliconed everything back together. I wasn't sure if the bolts were specially hardened so I bought them from the dealer at $13 a pieace. I replaced the strut and everything seems to be fine now but I don't know if the bushings are going to hold out given what I had to do.

 

i say replace the lower arms asap if your not sure bout the work you did to it.... but good work on the strut