Steel 6-Degree Leaf Spring Shims, 66-77 Ford Bronco SKU: 1188

Name: Steel 6-Degree Leaf Spring Shims, 66-77 Ford Bronco
Brand: WILD HORSES 4X4
SKU: 1188
Price: 44.99 USD
Availability: InStock
Rating: 4.93 (25 reviews)

Steel 6-Degree Leaf Spring Shims, 66-77 Ford Bronco

Product Overview:

When you lift the rear of your Bronco, your pinion angle changes—and that can lead to annoying driveline vibrations. These 6-degree Tapered Rear Leaf Spring Shims are precision-machined from steel to correct that angle and restore smooth, reliable driveshaft performance. Designed specifically for the 2-1/4" wide rear springs found on 1966–77 Ford Bronco, these shims come with both 3/8" and 7/16" center bolts to fit most stock and aftermarket spring setups, including Wild Horses’ own. Unlike generic cast versions, these hold up under real trail use and torque. Mount them with the thin edge facing forward to dial in the perfect 1–2° downward offset needed for your Bronco’s double-cardan rear driveshaft.

Full description

Early Bronco Tapered Rear Leaf Spring Shims | 6-Degree

Fine-tune your rear driveline angle the right way with these 6-degree Tapered Rear Leaf Spring Shims, custom machined to fit the unique spring dimensions found on 1966–77 Ford Bronco. Unlike weaker cast versions, these steel shims are purpose-built to withstand the stress of lifted suspensions and aggressive off-road driving. Each set includes both 3/8" and 7/16" center bolts to fit stock, aftermarket, and Wild Horses leaf spring packs. A must-have for reducing driveline vibration after a lift or rear axle change.

Custom-Made for Broncos: Precisely machined 2-1/4" wide steel shims—sized specifically for Early Bronco rear springs.
6-Degree Taper Correction: Perfect for restoring proper pinion angle after suspension lifts or rear axle mods.
Includes Dual Center Bolts: Comes with both 3/8" and 7/16" bolts for compatibility with most stock and aftermarket spring packs.
Built from Solid Steel: Not cast—these hold up to hard use, torque, and extreme off-road conditions.
Fixes Driveshaft Vibration: Helps eliminate deceleration vibration from misaligned pinion angles.
Installs Easily: Mount above the axle perches with the thin edge pointing forward for proper angle correction.
Dial in Double-Cardan Setup: Ideal for Broncos with stock-style rear double-cardan driveshafts—targets the recommended 1–2° pinion angle below driveshaft centerline.

Cut driveshaft vibes with confidence—our 6° steel shims correct pinion angle for lifted Broncos. Includes both 3/8" & 7/16" center bolts for easy fitment.

California residents: Proposition 65 Warning

Questions & Answers

NEED HELP? Talk to a BRONCO expert today! (209) 400-7200

PRODUCT REVIEWS

Randy Hendrix

Reviewed 06/23/2021

The product was flawless and appeared to be of good quality. The installation (in my driveway, by myself) was a bit of a workout. The "how to" video was helpful. Took about 3 1/2 hours, but I'm no speed monkey. Biggest challenge for me, (since I really didn't want to disconnect my frame to differential brake hose) was getting the third member low enough to slide the shim in without stretching the brake hose too far. Barely made it by loosening both sides, but only shimming one side at a time. I am pushing 60 years old, so when about the last step is to torque the U-bolts (8 nuts at 100+ foot-pounds), that's where you will feel it the next day. Hoping these shims will increase the life of rear driveline U-joints. Changed my rear U-joint angle from about 12 degrees to about 4.

John McClintock

Reviewed 05/03/2021

This was a great fix for the vibration coming from rear end. They were easy to install and now the vibration is gone

Greg Custred

Reviewed 03/17/2021

High quality material and precise machine work. Fit was great, worked as described. Shipped on time

Charles Meyer

Reviewed 07/30/2020

These were easy to install and significantly reduced vibration in my driveline.

Howard Frausto

Reviewed 05/25/2020

As always satisfied with the product from WH. Instructions are always very helpful and on point.

Timothy Strojny

Reviewed 07/05/2019

A must when using stock driveshaft.

Dave

Reviewed 03/28/2019

These are excellent steel shims that are well made. I was dreading the install but with the help of an energy drink, I had these installed in less than 2 hours.

Chuck Meyer

Reviewed 03/03/2019

Haven't been able to drive her at speed yet, but the directions were great and the install was quick and easy!

Roger Spade

Reviewed 12/07/2018

everything worked like it should. vibration gone

Ryan Randolph

Reviewed 03/21/2018

These shims are steel so they can be permanent. I used them on a 2.5 inch lift with a longer transmission, so they helped with by pinion angle.

Michelle Lomier

Reviewed 04/15/2018

Product seemed to be great but when I received them but I only received the 3/8" bolts and our leaf springs had a 1/4" hole so getting the holes to accept the 3/8" bolt without having the option for the 7'16" bolts was a nightmare...... I had to use about $50 in drill bits to accomplish the job.

Jon

Reviewed 04/16/2018

I installed a 2.5 lift on my 70 Bronco and wasn't comfortable with the increase in drive shaft angle. After some measurements I figured the 6 degree shims would work best. The Wild Horses kit was the most complete kit I could find and the most affordable. The install was smooth as could be expected and the instructions were clear as water. I couldn't be happier with the product.

Mike

Reviewed 11/08/2017

Even with a 2 1/2 in lift it helped with the rear end vibration.

Andy Mailman

Reviewed 09/25/2017

Excellent fit. Removed my driveline vibration after installing new springs.

Robert M Skidgell

Reviewed 09/03/2017

Install was easy, came with 2 different size threaded center pins for universal applications, best price from vendors.

Lance opperude

Reviewed 07/29/2016

Always great product, alway fast shipping...talk with them on the phone, very helpful and polite.

Matt D

Reviewed 05/22/2015

After installing a 2.5" suspension lift, I had a small vibration from the rear driveshaft. I measured the pinion angle and it was too steep so I ordered these. Installation was quick and easy and they got rid of the vibration.

Tim H.

Reviewed 08/21/2014

These shims virtually eliminated the rear driveline vibration in my bronco.

bud

Reviewed 08/03/2014

excellent product

Jim Mangiameli

Reviewed 07/17/2014

Just received rear 5.5in.leaf springs and 6degree shims and the extreme u-bolt kit,and I couldn't be happier,these parts rock,thanks WildHorses,Jim.

Paul

Reviewed 03/17/2014

With running a ZF and 3.5 SL, the pinion to driveshaft angle was severe, +9 deg. These 6 deg shims did the trick! Now its 3-4 deg.

PaveBronco

Reviewed 03/17/2014

Wont corrode and fall appart like those other Pot metal ones.

dunacn1

Reviewed 08/14/2013

Contacted Paul at WH with my symptom, he immediately knew I needed shims for my leaf springs. Where the customer service excelled was after the sale when I was provided detailed install instructions and a follow-up to see how it went!

Dmh

Reviewed 02/11/2013

Much better quality then I took off

MOSQUITO COUNTY STEVE

Reviewed 03/01/2012

COOLER THAN "DANG IT" I WISH I HAD DONE THESE 6 DEGREE SHIMS 20 YEARS AGO. NO MORE BRONCO CLUNK OR VIBRATION. IF YOU HAVE THE BRONCO DRIVESHAFT CLUNK/VIBRATION THEN DO THIS IMMEDIATLEY. YOU WILL NOT BE SORRY! '73 WAGON, BUITL WINDSOR, HEAVY BUMPERS & WINCH, WH 3.5" LIFT.

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