66-77 Bronco 5.5″ Performance Package

66-77 Bronco 5.5″ Performance Package

SKU 5065 Categories 5.5" Suspension Lift, Early Bronco Suspension Systems, Not Eligible for Black Friday, Performance Packages

Upgrade your 66-77 Bronco’s performance with the 5.5″ Performance Package, designed to enhance both on-road and off-road driving. This comprehensive lift system features high-quality components that ensure durability and improved capabilities.

Choose Year 1 Choose Year

Start configuring your very own Performance Package here:

There are a few differences throughout the years of the '66-'77 Bronco platform.

'77 Year model Broncos did have a mid-year axle housing change that requires a different torque tamer. You will be presented with these options based on your year model selection below.

Available options:

System Details and Color 2 System Details and Color

Choose your Color - Midnight Black or Duff Signature Blue

This section contains all the lift system components except steering and your leaf spring configuration. Those will be chosen in the next sections.

Available options:

Shock & Tower Selection 3 Shock & Tower Selection

For this system you can choose our 0-1" shock towers and rear shock mounts or our 2" body lift shock towers and rear shock mounts. 0-1" can be installed without a body lift, while the 2" package will require a 2" body lift.

Depending on your goals and what you will be doing with your Bronco and which tire you'll be installing will dictate which is best for you. Hobby horse features a 1" body lift with the 0-1" shock towers and rear shock mounts with a 36" Super Swamper.

Available options:

Drop Pitman Arm 4 Drop Pitman Arm

This Performance package comes with our Bump Steer Eliminator system. For Tie Rod Under '66-'75 Broncos, It requires the use of a 2" drop pitman arm.

For '76-'77 Broncos, it requires the use of a 4" drop pitman arm.

If you do not have one you may purchase one here.

Available options:

Steering Mounting Hardware 5 Steering Mounting Hardware

You will need to select the proper knuckle mounting hardware for the steering linkage that comes with this system. If you are not sure which one you need or not sure if your Bronco's knuckles are stock or have been modified then you will need to verify that before choosing.

If you are looking for the strongest or off-road options for your setup then you will want to choose the 3/4" bolt or the F150/GM 1-ton mounting kit options. Both of these options may require drilling/reaming and we provide those tools as an add-on once you make your selection.

564X - 3/4" Bolts for TRO or TRU applications - Requires Drilling of knuckles
5660 - Tapered Stud Kit for Stock Early Bronco Knuckles Tie Rod Under and Over Applications
5661 - Tapered Stud Kit for F-150 / 78-79 Bronco & GM 1-TON Tie Rod Under and Over Applications

Available options:

3/4" Drill Bit 6 3/4" Drill Bit

If you choose to drill your knuckles we suggest purchasing our high quality drill bit to make the install easier.

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Tapered Reamer 7 Tapered Reamer

If your knuckles are in rough shape you'll want to consider adding a tapered reamer to clean up the knuckles before installing your new steering hardware. We offer two different options to help with this issue, a 7 degree reamer for your drill or a hand reamer. Hand reamer currently out of stock.

Available options:

Leaf Spring 8 Leaf Spring

Before you choose your spring, you need to understand the difference between Medium duty and Heavy duty. First off the difference has nothing to do with ride quality. Our Heavy Duty spring will not give your Bronco a stiffer ride. This is simply to make sure your Bronco will sit level or at the very least not squat in the back when your Bronco is complete.

Medium-Duty springs are for 66-77 Broncos that have very few add-ons or accessories in the rear. For example, if you have a stock half cab or roadster you would choose medium duty. If you have a resto-mod wagon with a soft top, stock rear bumper, no spare tire, and stock fuel tank, with or without a back seat but not typically using it, then you also would choose medium-duty springs. We do NOT recommend medium duty for trailer towing.

Heavy-Duty springs are for 66-77 Broncos that are geared more towards a well-equipped resto-mod for on and off-road use. If you have or plan on upgrading to a 20+ gallon rear fuel tank, tire carrier + tire, steel plate rear bumper, and/or want to run a hardtop, the heavy-duty leaf spring is also a great choice for your build. These are also the best option if you plan on ever towing anything with the Bronco. If you like going off-road and hitting the trails, the heavy-duty leaf springs are typically the best option for you as well.

For some of you, there will be some combination of parts that accessorize your Bronco in between a soft, medium, heavy, and extra heavy-duty setup. This is why we offer lifted spring perches, 1/2" and 1" lift blocks as well as pinion shims for driveshaft angle corrections to get your ride height and driveability spot on. Our new 1/2" lift block will also offer the option to move the axle back for that perfect amount of tire to fender clearance for the uncut lifted 66-77 Broncos.

Installation Note: The Double spring Wrap aka Military wrap is to be installed towards the front of the vehicle.

You can also add on great upgrades when purchasing these springs like Leaf spring and shackle mounting hardware, Shackle bushings, the Duff HD spring plates, U bolts or HD U- bolts (both that come standard with new HD hardware), HD shackles, pinion shims, lift blocks and new Duff HD weld on spring perches offered in factory and 1" built-in lift.

Available options:

Pinion Shims 9 Pinion Shims

We highly recommend purchasing and installing pinion shims at the time of installing your leaf springs. If you do not know how to measure your pinion angle please refer to our driveshaft measurement form here. If you are installing this system on your Early Bronco and it's equipped with a stock style frame, stock drivetrain configuration, and stock rear axle then you can start with a 6-degree pinion shim if you do not want to measure the pinion angle after the lift is installed. If you find that you need more than 6 degrees of pinion correction then you'll need to cut off the leaf spring perches and install ours. We have preselected 6-degree pinion shims for your order. If you would like to select a different degree or purchase our weld-on spring perches please scroll down and the other options will appear.

Available options:

Torque Tamer 10 Torque Tamer

We highly recommend you consider adding this to your purchase now. This anti-rear axle spring wrap device prevents damage and failure to your rear driveshaft and leaf springs. This is a must for anyone who has a heavy foot, running 300+ horsepower, has a manual transmission, and/or likes to go on and off-road with their Bronco. Customers have stated the Torque Tamer has also made their Broncos more stable off-road and smoothed out their take-offs and shifts.

Important: When installing the Torque tamer you must have your driveshaft angles dialed in with less than 2 degrees of difference in pinion to driveshaft angle. This typically will require pinion shims and they are offered in Body lift & Accessories for this kit. You can also weld on HD leaf spring perches offered here.

Note: If you are not running one of our exhaust systems this product may require you to modify the exhaust system you are currently running. We highly recommend you use one of our exhaust systems as they work with all of our parts. More info here.

You will be presented with 2 options below - 1) Our Heavy Duty Torque Tamer for OEM frame 2) Our DIY HD Torque Tamer for Aftermarket Frames

Note: crossmember in the DIY kit is NOT powder coated or fully welded. For more info click here.

Available options:

Torque Tamer Bolt-On Bracket 11 Torque Tamer Bolt-On Bracket

This includes the 5324 spacers and 5313 longer u bolts you need to mount the rear sway bar. You no longer have to worry about finding a buddy or a shop to weld the brackets on your axle for your Early Bronco Torque Tamer. We now offer a Bolt-On option, allowing for a pain-free install. Another benefit by installing this bolt-on option is the main bar of the Torque Tamer will be closer to the center of your drive line eliminating axle wrap more efficiently than the weld on brackets. This will require the removal of the rear axle center section and swapping out 4 of the 10 studs that mount the third member to the axle housing which will be replaced with the included longer studs. Bolt on bracket comes Zinc plated and includes all required hardware to install. Click here to read more.

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TTBOB Accessories 12 TTBOB Accessories

If you are purchasing a torque tamer bolt-on bracket we suggest purchasing the accessories below.

Available options:

2" Body Lift and Accessories 13 2" Body Lift and Accessories

If you are installing the long travel version of this system it requires at least 2" of body lift. You can add one below.

Available options:

14 Review and Purchase

66-77 Bronco 5.5" Performance Package quantity