1999-2019 GM 1500 5" shackle reversal

Applications: 1999-2019 GM Silverado 1500, GM Sierra 1500, leaf sprung suburban, and leaf sprung Yukon XL.  Does not work on the newer 2019 and newer trucks

Currently the rear of your truck has a tension style shackle hanger (shackle points towards sky). Our shackle reversal replaces that stock bracket with a much stronger bracket that points the shackle towards the ground creating lift. Everything else about how your truck rides is kept the same!

Typically, a truck is lifted with either a lifted spring or a lift block. A lift spring uses a higher spring rate resulting in a stiff lumber wagon ride. A lift block add more leverage causing axle wrap/hop under acceleration. Lift blocks are also notorious for falling out and causing terrible accidents.

A shackle reversal allows you to keep your stock spring rate and does not have the hazards of using a block. Some auto manufactures came stock with blocks in the back. The shackle reversal can replace those blocks allowing more traction for towing, off-road, or fun burn outs!

NOTE: With our shackle reversal kit you can re-use your stock shackles!

With our shackle reversal we even build in mud/water drain holes to help prevent rust!!

Nope! It will drive just like it does now, in fact many newer heavy-duty trucks are running compression style hangers like the shackle reversals for your truck. Also if you are replacing your current blocks with a shackle reversal expect it to handle way better! No more extra leverage on those leaf springs causing axle wrap. 

Most lift kits come in a 4.5" , 6, or 7" variety with a block in the back. With the 5" reversal you can remove the block and look level. If you want some rake the stock 1" spacer can be used (typically found on Z71 or other 4x4 packages). It is pretty easy to adjust the rear height to suit many different lift heights or preferences. 

Things that can be done to change rear height:

• Add spacers to the leaf springs. These are just pieces of flat stock iron with a hole drilled in the middle so it can be bolted in the leaf pack.
• Use a block like the 1" factory z71. Yes you are still using a block but it's no where near as bad as the blocks that come in lift kits.
• Use a add a leaf
• Use longer shackles. 

Very easy!

1. Safely lift/jack truck up and put on jack stands. Make sure to use proper safety gear and equipment
2. Locate rear shackle hanger and remove shackle/leaf spring from it. If you have a tow hitch it will also need to be removed.
3. Remove rivets holding shackle hanger on frame. This can be done super fast with an air chisel. Another method is using a cutoff wheel to cut an X in the rivet. Then take a hand chisel to the heads to remove them. There is a weld on the shackle hanger brace that will be need to be removed, it can be done with a cutoff wheel or air chisel.
4. Bolt in shackle reversal and torque bolts to 60 FT/LBS. NOTE: SHACKLE REVERSAL OFFSET GOES TOWARDS FRONT OF TRUCK! Bolt the horizontal bolts in first then the vertical. 
5. Bolt in leaf and shackle into the shackle reversal. The rest is reverse of removal. If you are reinstalling the hitch some .25" spacers may be needed. 
6. After driving 100 miles make sure to re-torque bolts

Note: Adding a shackle reversal may change pinion angle in some cases, If you do need to correct your pinion angle a shim is usually all it takes to correct. Shims can be purchased at most drive shaft shops.

Note: The bracket lift height is based off of what you are at now. So for example if your truck came with a 2" block and you use a 4" reversal bracket it would be 4" lift keeping the block. If you remove the 2" block you will end up with 2" of lift above stock (4" reversal - 2" block = 2" lift).

 HOG TIP: Shackle reversals will typically move the axle forward some, so use one of these axle relocation plates to get it where you want click HERE

 HOG TIP: Need help determining what to do to get to your desired suspension height? Check out this write up HERE