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woodiewagon46 · 07-15-2014, 10:08 AM

Think of the rear hanging on two movable points (shackles) and fixed at the torque tube. Every time you go over a bump the rear moves up and down AND side to side as the shackles do their job. In the rear, if it is a small bump the movement is minimal, but it can "float" on the shackles. On the front of the car a Panhard Bar is used to correct this condition, called "bump steer". A car with a really loose front end can move all over the place when it goes over bumpy roads. If your car does not have a sway bar and you drive a lot at highway speeds, it can't hurt.

07-15-2014, 10:08 AM	#4
woodiewagon46 Senior Member Join Date: Jun 2012 Location: Long Island,NY Posts: 1,555	Re: 1940 Ford Suspension Question Think of the rear hanging on two movable points (shackles) and fixed at the torque tube. Every time you go over a bump the rear moves up and down AND side to side as the shackles do their job. In the rear, if it is a small bump the movement is minimal, but it can "float" on the shackles. On the front of the car a Panhard Bar is used to correct this condition, called "bump steer". A car with a really loose front end can move all over the place when it goes over bumpy roads. If your car does not have a sway bar and you drive a lot at highway speeds, it can't hurt.