LT1, Please help my ignorance. Telling me it's unsafe, and not giving me the WHY doesn't inform me on the hazards of shimming the front. I read your previous post on the spring pins possible failure, is that the only problem? If so, is there some way to fix it/strenghten it?
My issue is/was a 3" lift, with some Currie greaseable shackles (1/2" longer than stock). That threw/rotated my C's froward, ie caster off, and pinion angle off. To rotate everything back I opted for shims.
So, should I cut off my spring perches, and reweld them back? or something else. Again, just looking for options. I like safety first.
First, Please list your alignment specs,
Then I can better lead you into the right direction.
An alignment is the only correct way to determine correct specifications.
I could tell you it's unsafe to jump off a bridge,
but you would still like the specific reason why it's unsafe.
The reason not to shim the front end is simple.
It's unsafe, It's not the proper way to fix it, It's illegal !!!
Your not only risking your life, But everyone else out driving your roads.
What makes them so bad?
Your Jeep creates a certain amount of rolling momentum. Whenever the brakes are applied, roughly 70 percent of the vehicle's weight is transferred to the front axle. This pitching action causes the front axle to roll forward, thus applying extreme pressure on the front U-bolts and springs. When you add a block shim into the equation it elevates the leverage point on the front axle, causing the axle roll to become even more dramatic. Enough force or pressure can be applied to shoot the front block shim out from between the axle and the spring. This will result in loss of steering, braking and front end control.
Also as mentioned, the pin can shear off, or since the shim has now sucked up length of the pin it is easily possible for the axle to slide off the spring pin due to the lacking depth of the pin.