All Pro Standard leafs and up travel

I loaded up with 1.5yds of mulch the other day.

The rear was about 1.5" from the factory bumps.

The springs were into negative arch.

Icon 2.0s had over an inch of travel left on the shaft.



The spring retaining bolt contacts the frame on both passenger and driver sides. I have been on the bumps before while articulating and have never contacted the frame.

What is going on here? How do I fix this?

 

It does contact during normal articulation.

On the bumps.

 

You need lowered bump stops.

 

Lowered? As in shorter?

I'm thinking you're meaning longer bumps stops. Which to me just seems like a bandaid. As an oem bolt on spring, I'd imagine that the springs are designed to utilize the oem range of travel. How do the hardcore guys set up their trucks to utilize full range of motion? How do they bump out on the frame without the spring hitting first?

This doesn't seem to be a common issue. Searching for leaf spring contacting frame yields no relatable results.

 

Yes longer or extended. I said that wrong. The leafs should never go inverted. All pro even suggests this and it voids warranty. I have a set of expeditions I'm about to install with wheelers lowered bump stops.

"Please note:

After installation, the stock rear bumps will no longer be sufficient to prevent the spring from inverting. You must purchase and install a set of bump stops that are of sufficient height to prevent the spring from going negative arch. For best results, we recommend Wheeler’s SuperBumps (sold separately).

Failure to use bump stops of sufficient height may void the spring warranty.

• Using a lifting block or shackle flip with our springs will void the All-Pro warranty"

 

You need longer bump stops, this isn't a band aid, it's the proper way. The leafs do utilize the stock range of travel but remember that they also lift the truck 2-3 inches so you need to account for that by installing bump stops that equal the total amount of lift.

You don't gain any increase in travel with a lift via leaf pack and stock stroke shocks, you're simply shifting the axle down but the shock stays in the same location, changing the up/down travel ratio.

My set up is dakar leafs, wheeler u bolt flip kit with superbumps, and Fox shocks for the Tundra. The Tundra shocks are a 9" stroke shock compared to the Tacoma's 8" stroke. They're also longer in length compressed and extended. Most websites recommend extended rear shocks for lifts around 3". The stock stroke shocks will limit your travel since they were not designed with a 3" lift with the factory location of the upper shock mount and leaf spring mounts. If you try to pull stock travel numbers with a 3" lift leaf pack, you will get negative arc.

Under full bump, I have 1/2" of shaft showing. So Im pulling about 8.5" of total travel. At rest, I have about 4" of up travel, and the rest is down travel. So my up to down travel ratio is .88:1

 

How do the fox and dakars ride? I'm about to install all pro expedition springs that can ride at 4" empty. Also got the extended resi Fox shocks.

 

This is the whole point of my question. Sure, were just moving the axle down but travel range should remain the same. I'm not trying to gain any travel, just keep the stock range of motion.

I don't wheel often anymore, family growth has limited my free time and resources. I'm not so interested in increasing off road capabilities by increasing travel and all that. However, I still want to use my truck as a truck by hauling things and getting around on the farm. If I can't load up with material/supplies without causing problems then the lift is actually limiting my capabilities and my intended use of the truck.

I think what I'll end up doing is going back to OEM + AAL. It might reduce my load capacity a little and lower the truck a smidge but that's not all so bad if I can still use the stock bump stops without interference. I can't go down the rabbit hole of adding longer bumps and probably a U-bolt flip. Then since I've limited up travel, in order to regain range, I'd need longer shocks, then brake lines, then, then then... I'd rather just remove the troublesome parts and move on.

I've been meaning to drop the front down anyway so bringing the back down with it would be good.

I guess I didn't want to accept that bump stops are required and that these springs do not like going negative. Some springs are perfectly happy going negative, just not these.

 

Oem springs can go negative but most lift springs do not like it. Going back to oem would be more work and also a downgrade. If you don't care about additional travel, keep your shocks and brake lines and just add the ubolt flip and wheelers bumpstops. The stops are an upgrade and will make bottoming out smoother. Also the all pros I'm sure handle more weight.

 

They ride okay, kinda stiff, but that's mainly cause I don't have any weight in the bed. With weight, they're very smooth and comfortable. The Fox shocks are awesome, theyre DSC so I can quickly adjust them for the weight/terrain. If I had to do it again, I would've gone with Deaver. Fyi my dakar are the medium.