Medium Pimpin' developed a problem last week. It started to shake between 45 and 60 mpH. My first reaction was to rotate and balance my tires. It still shakes.
I noticed that it is not as pronounced when you let off of the accelerator or floor it. I noticed that the shakes (and the growl) also dimishes when turning right (at higher speeds). I knew that my passenger front hub was failing. I thought that it may have been really worn and that it would stop when I replaced it. All'* quiet now, but It still shakes.
I have checked for warped rotors, loose suspension components, etc. to no avail.

Monday afternoon I will get it up on the lift and go over the suspension with a fine tooth comb, and give it an alignment. I don't have a lot of faith that I will diagnose the problem at that point.

Does anyone have any ideas for things to check?

I changed my passenger front hub today. Firstly, I would like to thank everyone who has posted information on wheel hub replacement/diagnosis. I have read about 2 dozen threads on the subject here. I would like to consolidate some of it now.

This task is not terribly difficult; it can be done in about 45 minutes.

• [*]
• [*]
• [*]
• [*]
• [*]
• [*]
• [*]
• [*]

You are also going to need something (wire hanger) to support the caliper, a 10mm wrench for the caliper bleeder valve if your rotor is heavily scored, and a medium-sized whomping tool. I prefer the mini sledge (my personal favorite for suspension work).
That is probably the most straightforward procedure for replacement. While there are holes next to the lug studs, they are not used on the bonnie; the hub bolts up from the backside.
Thanks, Mark.True, true…

Maybe cupped tires?

Nope, tires are good. No belt transfer or separation, no cupping or wearing, and they balance just fine.

That was the first things I thought to check.

Its not the tie rods or any other suspension component that I checked. Everything is good and tight now.

I did change the right outer tie rod end - it was toast (probably from the vibration).

I am beginning to think CV joint more and more. It does'nt have any of the tell-tale CV symptoms. It doesn't click when turning; the boots are not damaged. I will pull the half shafts tommorow. I hope I am not right.

Mostly under acceleration, could it be your harmonic balancer?
How does the tranny feel?

Good idea, Dad.

How do you check the harmonic balancer? Wouldn't that knid of problem be evidant at certain RPM ranges, regardless of speed?

I breifly entertained the tranny idea, but it feels as it always has.

I just had the tranny serviced (along with half of everything else, i.e. brakes, cooling sytem, power steering, fuel system, etc.) in December 2005 at the local dealer during its 92k, 97k, 101k, and 105k (ish) sceduled mainenance.

I just don't want to shell out another $900 up there. I generally do my own car repair, but sometimes I find myself to busy for general maintenance (hence the frequent trips to the dealer).

Its attatched to the crank, follow the accesory belt down to the main pulley in the center. There should be no movement up down or side to side. You can have some one lightly push the throttle while you inspect for any movement.

Another to check is tranny and motor mounts.