Wanted to get input from the long time 64-66 owners. Got what feels like a driveline vibration, nothing major, just annoying as heck, increases with speed. I've read multiple times that the 64-66 have an inherent driveline or motor vibration. Is this true? In the last two years I've replaced all major components; driveline, rear end, suspension, wheels, tires, etc. Is this something I gotta live with, or doI start isolating the issue; neutral driving, rotate tires, etc. My gut tells me the shop did a suck job on the wheel balance.

 

Motor mount misfunction?

Carlos

 

Hey groho, when you refered to driveline, did you mean driveshaft? Try unbolting the driveshaft and turning it 180 degrees. Or take the drive shaft into a specific driveline company. Have them check its balance.
Lowell

 

It's always best to start with the simplest things first....

U-joints?

Tire/wheel balance?

Transmission mount?

Rearend housing U-bolts tight? Has the alignment bolt in the bottom of the leaf spring pack worn/sheared off?

Dave

 

Nobody's asked the basic drivetrain vibration questions yet...

What speed does the vibration start? Does it stop at a certain speed? Does it vary with speed or rpm? Where does it feel like it's coming from, the steering wheel or the seat of your pants?

 

+1
Ballance the tires (cheap) then DS (also cheap). Then check the mounts. I also had the harmonic ballancer let go on mine, not all the way, but enough to annoy the crap out of me. It looked okay, but sure enough when I replaced it voila! No more vibration. That one took me a while to figure out. It was a pretty mild vibration tho. The DS was VERY noticeable. Replace the u-joints and have them ballance the whole DS as an assembly with the yoke. When I did that the car got smooth as glass. Another possibility although less likely is a wheel bearing, but usually there's a noise associated with that.

 

my guess is bad u joints

 

If it's a stick there is always the transmission pilot bushing.

If it's a slush box- never mind.

 

It could be bent axles. I had a bent axle it had about .011 run-out...made a very noticeable vibration. The easiest way to check is at the hubs were the lug bolts fit through. Run a dial indicator on the outside edge of the hub and see if its more than .003 run-out

-Gun

 

I like the checking simple things first. On the tires, I would have them "road forced" balanced and see if they fall into specs. The last one I chased down ended up being the tire out of round, not so much out of balanced. Like having an egg on the rim. Once I did the road force and changed the BAD (and NEW Eagle F1's) tires, the vib issue is gone. Also this will check rim runout, that can be a problem also and it seems that steel stamped rimsare worse. After you do that, then go to the next step. This may help.
http://www.armorb.procarcare.com/inc...04/4fig15.html