Ok so I bought a G35 coupe automatic with 60k miles in South Florida I paid 7 grand. The car was in a previous crash so the title is salvaged. Every time i hit 50+ mph the car shakes Ive tried changing the the front control arms, bearings, new tires, alignment, balance, I think its either the rear differential or the drive shaft how can I possibly know exactly what it is??

 

Any idea where the damage was when it was involved in the accident? And what's vibrating at speed? The engine? Steering? Entire car?

 

steering wheel, and car its coming from the rear end of the car im going to change the rear camber arms this week which need to be replaced so ive got my fingers crossed they may solve the problem...

 

My two cents: If you know it is coming from the rear, the wheels are balanced, and the alignment is in spec, then IF it is a suspension component, it seems like there would be play. You said you already changed the bearings, so you probably already checked for play at the wheel. Just to be sure, if you jack the rear wheel off the ground and grab the tire on opposite ends, is there any shimmy when you try to move it left to right or top to bottom?

If you still think it might be the drive shaft or diff, you could try swapping in another owner's known-good part.

 

i test drove it with a mechanic he said it its not the differential becuase it would be making certain noises but the car doesnt make a noise. I just order some Megan rear camber arms for the car they should get here in about 2 days. Hopefully this solves the problem 0_o

 

When i took it the car for an alignment they inspected it and tested the play thats how i found out i needed to change one of the bearings so the play of the wheels is in my opinion has been eliminated. They also checked for cracked rims came up with nothing and when I say they im refering to Tire Kingdom.

 

when i hadd this problem with my eclipse it was also the wheel bearings.

 

the rear or front bearings?