New drive shaft installed. Maybe CV joints now?

[2nd.amnd]

Good morning folks.

So I tracked down a nice new driveshaft, and had it installed yesterday. Two of the three u-joints in the old shaft were in pretty bad shape. (Yes, my driveshaft has three u-joints and no flex disc.) The car is much smoother and quieter now when the tranny is under load.

Problem is, I still have the wicked shimmy over fifty mph when I'm trying to maintain a constant speed. It goes away when I'm accelerating or decelerating. When the shimmy starts, I can make it go away by tromping on the gas or taking my foot off the accelerator entirely. This makes me look like a douche bag on the highway.

Anyone have any ideas? I replaced one of the CV joints in the rear end a few months ago. Is it maybe the other one? This is driving me nuts, and I’m running out of things to waste my money on.

I’m hoping it isn’t the tranny or the diff. I’ve already transformed a $500 car into a $2000 car that’s still only worth $500.

Ugh! Greg

[jlevie]

Drive shaft or half shaft problems are usually more sensitive to torque than speed and the problem will be worse with an increase/decrease in torque. What you describe sounds more like a problem with the wheels/tires, perhaps aggravated by worn out shocks/bushings.

[2nd.amnd]

Thanks for the input. I hadn't given much thought to the wheels and tires. This vibration seems like it's in the drive train, but I guess when you think about it, the tires are the last link in the drive train?

I think I'll try rotating everything this weekend. If that doesn't work, maybe I'll go over to the tire place and have them balance the wheels again.

Greg

[dwight]

If you need a axle I have one like new never used since it was rebuilt OEM/ABS 150.00 Shipped