okay i know people say you cant put blocks under the leaf springs in the front. BUT i have the factory ford blocks, so why couldnt i put them in the front since they have the rivot ?

 

In short, its dangerous. You need the small leaf packs.

 

What it does is change the geometry and also acts like a
lever at that tiny point. You run the risk of tipping a block
and loosing control of the front axel. It's along the lines of
what happens if you shear the sector shaft from the steering
box. It will cause you to crash.



I looked and did not find the why not to use blocks on front end video.

Sean

 

The forces on the front axle are very different than the rear. Steering forces put a sideways load on the springs that can easily spit a block out if it's not welded to the axle. Braking throws even more forces into the equation. It's all about the leverage. ALL of your control comes from the front axle. If a leaf spring/axle spits out a lift block, it's suddenly no longer attached to the vehicle. If this happens in the rear, you still have some control. If it happens in the front, you very suddenly have ZERO control, and you're probably turning or braking at that moment to avoid something.

Putting a lift block up front is not only extremely dangerous, it's also illegal most places. So if your suddenly out of control truck takes out a schoolbus full of disabled orphans, you'll be facing vehicular/negligent homicide charges, civil lawsuits, your insurance company will tell you to go spork yourself, and all manner of other unpleasantness.

It's dangerous and stupid. Don't do it. Think of the children.

 

Why no blocks on front?

A Suzuki had a lift in which they had added blocks on front end.

One day, the block fell out. Suzuki went left at 60 mph.

Good friend of mine was coming the other direction pulling travel trailer and his wife was trailing behind in another car.

Suzuki went through the TT and then head on in to her car. She survived, but spent much of the next year in the hospital and rehab.

Better safe than sorry.

 

Even if it's welded to the axle, you're generally talking about cast iron welded to formed steel, even a good weld under those circumstances won't hold up when subjected to the sideways forces that your front axle sees. It's cheap, it's easy, but it's wrong and dangerous.

 

Won't argue with that. I've heard of dedicated (that is, zero street use) mud trucks using welded blocks on the front axle, but they don't need to steer much and rarely encounter those pesky disabled orphans.

 

If it is an off-road truck then you might have a lot of $$ involved.
If you did have $ then a nice set of forged blocks or a set done
on the CNC. That way when welded it would hold up better.
BUT it's still a large lever and given the right forces that weld
will also fail.

Sean