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Discussion Starter #1
Installed 1.5" lowering blocks on my 69 multi leaf. The car pulls to the right. The right side is back 1/2". Also what is the torque for the plate where the U bolts attach. Any solutions. The car tracked true before the blocks.
 

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Installed 1.5" lowering blocks on my 69 multi leaf. The car pulls to the right. The right side is back 1/2". Also what is the torque for the plate where the U bolts attach. Any solutions. The car tracked true before the blocks.
Did you get the axle and spring mount/blocks on the spring centering pins correctly? It's pretty hard to move the axle fore and aft if you have the pins.
 

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Per the '68 Assembly manual the U-bolt nuts should be torqued 55-75 ft./lbs. You must draw them up evenly; criss-crossing tightening the bolts.

If the axle is sitting in the frame crooked (you mentioned there is a difference between one side and the other of a half inch) it will drive the car at an angle.

Big Dave
 

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Discussion Starter #4
Would that cause the car to pull to the right? I did criss cross the 2 U bolts on each side. Before I made these changes all was fine and the alignment was ok as well. Changes were tires, wheels and the 1'5" lowering blocks.
 

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As mentioned above there is a pin that sticks up out of the spring pack that engages a hole in the shock mounting plate on the bottom and with the spring perch above to center the axle. If your lowering block doesn't have a matching pin and socket then yes your rear end can be out of alignment. If it is then your car will not track in a straight line for the same reason that turning your front wheels turns the car.

Worse yet is even if corrected by taking it back apart and moving the axle where it needs to be: without that pin to prevent movement, it will get knocked back out of alignment just by driving the car (pot holes and scrubbing curbs).

Big Dave
 

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Discussion Starter #6
Got ya. The pin, this case a bolt that holds the leafs together is positioned in the center of the hole of the block and the top of the block "pin" is centered in the upper perch. This seems to be the reason it all ends up in the same location as the spring location has not changed. Would the next move to be to take it to the alignment shop?
 
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