Rear lift shackles for 3rd gen

Hey guys, has anyone used, tried or found rear 1” lift shackles for a 3rd gen? I have a 2021 TRD OR 4x4 with Eibach Pro kit stage 1 lift and I’m about to add a camper shell and want to eliminate any sag it may cause. I have an 1.5/2” rear AAL and was looking to increase the rear lift just by an inch. LMK

Thanks

 

You do know lift shackles on spring over axle are shorter?
No room for a shorter shackle...

 

Doesn't work that way with our shackle setup. Better off buying proper rear springs

 

I did not know that! I do have a 1” block but don’t want to use it. I’m still new to this and was wondering if that was even an option. Thank you!

 

I block can give you more axle wrap. Maybe not a ton but definitely adds leverage while making your usable travel less.

 

There is an aftermarket company or two that have rear shackles for the Tacoma. But they don't give lift from it, instead they do make the truck feel better in the back and likely help with rear body sway.

Get yourself a full leaf pack (Icon, Deaver) for lift and good bumpstops or airbags depending on your application.

 

airbags with Daystar cradles. The best way to go. I tow a 20’ Jayco on this setup (3500-4000lbs)

 

Are you sure all spring over axle setups have inverted shackles (ones that extend above the mount)? I thought earlier gen Tacomas had non-inverted shackles. One picture I quickly found online backs that up. In any case, it doesn’t affect the OP, unless we wants to install a shackle flip kit.

 

Never made the claim...
Was the pic you saw a 5-lug spring under axle?

 

It might have been, but it was definitely spring over axle. Also thought I read somewhere a while ago that the 3rd gen was the first with the inverted shackle. Is my memory bad?

 

This is the video I found with my quick search. I didn’t spend anymore time analyzing other than to conclude that I was not crazy to think spring over axle does not require an inverted shackle.

https://www.google.com/search?q=tac...ate=ive&vld=cid:d01bcf00,vid:6sPBOzj6u9U,st:0

 

Huh...before 'my time'.
Either way, shackles ain't the way to add lift.

 

Perhaps not, but there is some information on the net about modifying the shackle to tune the range of motion of the leaf spring much of which confuses me. For being an ancient device, the leaf spring is deceptively complex.

 

They do sell a shackle flip kit for the 3rd gen. From my research it doesn't work as good as the stock style.

 

I know what you're saying about "deceptively complex"...so much so, it seems more like an art.
In my pursuit of the how/why of things, I've found engineering/analysis papers still being written to this day....
The mono leaf Corvette leaf spring is what really trips me out...

 

For a long time I’ve been curious about the mechanics of leaf springs. Unlike coil springs, no manufacturers publish any sort of metric like spring constant, which among other things suggests to me that they are too complex to be modeled by hookes law. I also have not found in my casual searches any mathematical model for them. In my physics and engineering education I was never presented with the leaf spring. It baffles me since they are so ancient.

 

The one thing I found that seems like a constant throughout, is that a leaf pack is the sum of all it's parts. From a design perspective, add-a-leafs or configurable springs are a no-no. It screws with the load balance between leafs.

I was intrigued when Dobinson said they were developing a parabolic leaf pack. Too bad they abandoned the idea.

 

https://www.alldogsoffroad.com/alld...-load-leaf-pack-for-2nd-3rd-gen-toyota-tacoma

Alldogs just started offering parabolic springs.

I have their broverland springs and can say I am a fan. They are basically a higher arch/lift heavy duty version of the OEM springs. The also offer a high leaf count pack designed for different weights.

The manufacturer they are using to design and fabricate their springs would appear to know what they are doing. The only issue is that the manufacturer uses bushings that are 1/8" narrower than stock. There is enough slop in the OEM hangers to make it work as is, throw a washer in on one side, or plan to replace the bushings with something else, so I wouldn't let that be a deal breaker.

Give them a call to get the pros and cons of each style of leaf spring. They are still a relatively small business so usually one of the partners of the firm will answer the phone.