Blocks lead to axle wrap, axle hop, and broken/warped springs. And stacking blocks is illegal in most states, and very dangerous. Get the AAL.

 

I couldn't believe how much mine was off after I installed the Procomp lift. I thought I'd done something wrong! In any case, I installed some 4" add-a-leafs to the rear w/out changing the block the kit came with and now it sits almost level. It's close enough that I can't tell w/out measuring and it looks a lot better.

 

okay cool thanks for the feedback. sounds like aal is the way to go. I do not know what axle wrap is though. What is it??? And yes my truck is 97% a street princess

 

axle wrap : caused by torque of the rear wheels twisting the leaf springs into a sort of "S" shape. This is unwanted suspension movement that allows the pinion angle to change.The springs twist and untwist rapidly, causing the rear to hop under power. Spring-over axle leaf setups are more prone to axle wrap than spring-under configurations. Shock placement, such as one shock facing forward and one facing backwords, is done to reduce wrap. Axle wrap is also increased by lift blocks. Here is a simple diagram showing the leaf twisting under axle wrap.

 

AAL and you'll have results like this......

 

i think the way it's sittin now looks good... could be about 3inches taller though... body lift?

 

Sorry guys but I'm running a 5" block, 2" Deaver add-a-leaf, a few performance mods and no axle wrap. Springs are better than blocks, but these trucks arn't a offroad monster so I wouldn't worry about it but that's my opinion. . not to mention my truck goes offroad almost every day including pulling a 6,000 lbs trailer out of sugar sand.

Are you sure? ProComp's 6" lifts advise stacking their 2.5" block with the factory 2" block, I didn't think they'd sell a kit that would be illegal in a lot of states.

 

I'm sure you're getting axle wrap. Ever done a burn-out and been rewarded with a hopping axle? That's axle wrap. It happened in my F-150 many times


Didn't have much time to search, but from what I've heard, any blocks on the front end is illegal (and very unsafe), and stacking blocks is also illegal. A few states even have laws against blocks... Lift laws...

 

I'm probally getting it but not near enough to break anything or feel it but I've done plenty of burnouts without any problems, I guess I'll need to get a video once I get my truck back in shape. I'm sure I'll have some with a set of 4.88s though! I'm planning on a set of traction bars though, I haven't decided what to get yet though, I might take up the task of building a set.

The only vehicle I've ever got wheel hop in other than my Mustang, which was only once, was my pops 2002 F-250 on the beach. My truck, never. Central Florida has some pretty wicked sugar sand too.

I didn't doubt you, I agree with you. I've always thought stacking blocks was very dumb, but could never get over that ProComp advise this in their instructions and how they built their kit.

 

There was nothing in my Procomp lift instructions about stacking blocks. I wouldn't have done it even if it had said it.

 

. . don't they only include a 2-1/2" block in their kit?

 

I think that's what it was. As I said in an earlier post, I thought I had done something wrong when I finally had the lift installed and the put on the wheel/tire combo and sat it back on the ground. The front was visibly much higher than the rear. That's why I added the 4" AAL.

 

I'm pretty sure other members don't me that the instructions or ProComp's tech support told them to stack it with their factory block for a level stance.

 

Possibly so. I just don't remember it that way. In any case, I just used the supplied block and used a 4" AAL. Now that I'm thinking about it, maybe the difference is that my truck is 2WD. I didn't have any existing blocks.

 

hey cstamper can i see a pic of your truck please cause mine is 2wd also. I would also like to know what brand aal you installed, and would like to hear feedback on some brands and heights of aal people think i need to get level.