[my427cobra]

My Snake is slithering.
I’m experiencing a strange suspension movement in my Cobra. It’s slithering from side to side. It just started a week ago .

To be more specific, I’m experiencing a slight yaw (right to left motion) at low, moderate and highway speeds.

It seems to manifest itself as a slight right hand yaw when I ease up on the throttle and a slight left hand yaw when I apply the throttle again.

I’m not talking about full throttle changes, but even at small throttle applications.

Maybe a 1 inch movement in the steering wheel, the car moves over 6 inches to a foot over a 50 to 100 ft distance of travel.

At even throttle speeds, low, moderate or highway speed I experience a slight side to side wandering.

I’ve checked all 4 tire pressures and BFG’s are all at 22 psi. I’ll try bumping them up to 24 and 26.

But I don’t think it’s tires because it just started out of the blue last week. Although BFG's have had reported tread problems.

Doesn’t seem steering or front suspension related as it’s manifesting itself as throttle changes.

So I’m thinking rear suspension movement side to side.

I have a Ford Lincoln Versailles 9 inch rear axle with 2 lower forward swing arms about 20 inches long (hiems at the axle and urethane solid rod ends at the front attachment to the frame). A center link , about 8 inches long at the top of the pumpkin is centered on the axle and attaches to the upper frame hoop (works as a center swing arm and pinion angle setting). And a 24 inch panhard bar from the bottom of the pumpkin to the right hand frame member with hiem joints at both ends

All the bars are parallel to the ground when the car is sitting on the ground at normal ride height.

So I’m thinking, if the rear axle is “steering the car” as the throttle is released or applied, could the axle be rotating slightly due to a bad joint somewhere?

Shocks are Carrera adjustable with 275 lb adjustable 10 inch coil overs. Don’t think it’s the shocks because the ride and handling seems the same.

I also have a rear sway bar but unlikely that would cause the problem.

So I’m asking if any of you have any other suggestions.

I’ll get the car in the air and start checking all the joints and their fasteners.

Cheers
Greg