2015-17 Mustang Lowering Spring Installation (GT, EcoBoost & V6)

2015-17 Mustang Lowering Spring Installation (GT, EcoBoost & V6)

 

2015-17 Mustang Lowering Spring Installation (GT, EcoBoost & V6)

Posted 1/20/2015 by BRYAN MERTZ


Our Guard 2015-17 Mustang GT did not stay stock for long! We added a set of Eibach Pro-Kit springs to this S550 and it made a great difference in handling, ride height, and overall performance. Follow along as we walk you through how to install lowering springs in your 2015-17 Mustang.

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2015-17 Mustang Lowering Spring Installation Guide

Tools Needed

  • 13mm Socket
  • 15mm Socket
  • 16mm Socket
  • 17mm Socket
  • 18mm Socket (Deep & Shallow)
  • 21mm Socket
  • 22mm Socket
  • 24mm Socket
  • 17mm Open Ended Wrench
  • 21mm Open Ended Wrench
  • Jack
  • Jack Stands
  • Spring Compressor
  • Door Panel Removal Tool
  • Hammer
  • Front Spring Removal

    1. Place the car on either a lift or securely on jack stands.
    2. Remove the lug nuts with a 21mm socket.
    3. Remove the brake caliper by removing the two 15mm bolts.
    4. Set the caliper out of the way, we rested ours on the k-member.
    5. Remove the brake rotor.
    6. Using a door panel removal tool, remove the two plastic clips holding in the ABS lines to the ABS sensor.
    7. Using a 24mm socket and a 21mm open end wrench, loosen but do not remove the two bolts on the bottom of the strut.
    8. The strut bolts are splined and will need to be tapped out using the hammer.
    9. Once you have the bolts tapped out, remove the two nuts.
    10. Loosen but do not remove the 3 bolts on the top of the strut using a 16mm socket.
    11. Now you can finish tapping the strut bolts out and then remove the sway bar end link bolt using a 17mm open end wrench and an 18mm deep socket.
    12. Remove the three strut tower nuts and remove the strut and spring from the vehicle.

    Removing The Spring From The Strut

    1. Using the spring compressor, place the claws directly across from each other.
    2. Tighten one side a little and then go to the other side and tighten it just as much.
    3. Continue this sequence until the bottom of the spring is pulling away from the isolator.
    4. Remove the small thread cover from the top of the strut and remove the strut mount bolt with a 21mm socket.
    5. You can now remove the strut mount and isolator first and then the spring, bump stop, and dust boot.

    Installing The New Front Springs

    1. Take the new bump stop and install it inside the end of the new dust boot with the flat side of the bump stop facing up towards the top of the strut.
    2. Slide the new dust boot and bump stop onto the strut.
    3. Install the new spring with the Eibach logo facing up and the bottom of the spring pigtail aligned with the isolator and compress the spring in the same alternating process as you used on the old spring.
    4. Align the top of the spring pigtail with the isolator and loosely tighten the 21mm strut nut.

    Reinstalling The Strut Assembly

    1. While putting the strut back into position, slide the strut mount bolts into the strut tower holes and loosely install the nuts.
    2. Slide the strut bolts through the strut and tighten them down.
    3. Reattach the ABS line clips and reinstall the sway bar end links and tighten down.
    4. Slide on the brake rotor and install the brake caliper.
    5. Tighten the three strut mount nuts and the strut nut and reinstall the thread cover.
    6. Repeat the same steps for the other side.

    Removing The Rear Springs

    1. Support the IRS subframe with a jack to remove the two IRS bolts with a 22mm socket, and loosen the front IRS bracket bolts using a 13mm socket.
    2. Since we are essentially dropping the IRS subframe, you will need to remove the brake line bracket with a 13mm socket so it has some wiggle room.
    3. You will then remove the two bolts that are holding the rear shock mount to the chassis with an 18mm socket.
    4. If needed, you can lower the jack a little to give you more room to lower the control arm to remove the spring.
    5. With the spring removed, you can take the thread cover off the shock and remove the shock nut with a 15mm socket.
    6. Slide off the factory dust boot and bump stop.

    Installing The New Rear Springs

    1. Slide the new bump stop onto the shock with the flat side facing up and then the factory dust boot will slide over that.
    2. You can install the new Eibach springs making sure that both the top and bottom pigtails of the spring are aligned with the isolators.
    3. Jack the IRS up and reinstall the shock mount to the chassis and then install the shock nut and thread cover.
    4. Reinstall the brake line bracket and raise the IRS subfram to align up the bottom hold of the chassis.
    5. Tighten down the two sub-frame to chassis bolts and the front sub frame bracket bolts.
    6. Repeat the same process for the other side and you are done.

    We measured the car after the install and it measured 27 ½ in the front and 28 inches in the rear. The total drop was 1 inch in the front and ½ in the rear. The ride is firm but not harsh and remember to get a 4 wheel alignment after the install.
    2015 Mustang Lowering Spring Installation (GT, EcoBoost & V6) - 2015 Mustang Lowering Spring Installation (GT, EcoBoost & V6)

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About the Video

Mustang Eibach Pro Kit Lowering Springs Install (2015-2016 All)

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Published on 2014-12-05
The Eibach Pro Kit will rid that ugly, factory wheel gap and lower your 2015 Mustang approximately 1" in the front and 3/4" in the rear. These lowering springs feature a specific rate for a firmer ride and will fit all 2015 EcoBoost, V6 and 5.0 Mustangs!

The kit will also include new bump stops and front dust boots. We measured the factory springs from the ground to the top of the fender and the results were 28.5" for the front and rear.

After installation, we remeasured from the ground to the top of the fender and achieved 27.5" in the front and 28" in the rear. Those results are good for a 1" drop up front and 1/2" out back!
Transcript
What's going on, guys? Landan with latemodelrestoration.com. Today we're going to be checking out Eibach Pro Kit lowering springs for all 2015 Mustangs. Every Eibach spring kit is designed and tested by a suspension engineer and performance driving professional to offer aggressive looks and high performance handling.

The Pro Kit will rid that ugly factory wheel gap and lower your 2015 Mustang approximately one inch in the front and 3/4 of an inch in the rear. These lowering springs feature a specific rate for a firmer ride and will fit all 2015 EcoBoost, V6, and 5.0 Mustangs.

The kit will also include new bump stops and front dust boots. We measure the factory springs from the ground to the top of the fender and the results were 28 and 1/2 inches for the front and rear. Now let's go ahead and show you how to install the Eibach Pro Kit lowering springs onto your 2015 Mustang.

Begin by placing the car on a lift or jacking it up and placing it on jack stands. Remove the factory lug nuts with a 21 millimeter socket and then remove the wheel. To remove the front strut, start by removing the brake caliber. This is held on by two 15-millimeter bolts.

Once removed, you can set the caliber on the rear of the K-member. Then go ahead and remove the brake rotor and set it aside. Remove the two pushpin clips that route the ABS wire to the ABS sensor.

To remove the strut, use a 21-millimeter open end wrench for the bolt and a 24-millimeter socket for the nut. Loosen both nuts, but do not completely remove it. The strut bolts are splined, so you will have to tap them out with a hammer. Once you have tapped the bolts loose, go ahead and remove the nuts.

Next, loosen the three strut tire bolts with a 16-millimeter socket, but don't completely remove the buts. Tap the strut bolts out and then remove the sway bar end link nut with a 17-millimeter open end wrench and an 18-millimeter deep socket. Then remove the strut tire nuts, the sway bar end link, and remove the strut from the car.

With a set of spring compressors, compress the factory spring. Make sure each spring compressor is placed on the opposite side of one another and compress each side of the spring, alternating back and forth until the bottom of the spring starts to separate from the isolator.

Then remove the small thread cover from the top of the strut and remove the strut mount bolt with a 21-millimeter socket. From there, remove the strut mount and isolator and then slide the spring and dust boot off of the strut.

Be sure and remove your spring compressors from the factory springs. Using the supplied dust boots and bump stops, slide the white bump stop into the dust boot with the flat end facing up towards the top of the strut. Then slide the new bump stop and dust boot over the strut. With the Eibach logo facing up, align the bottom pig tail with the isolator and compress the new spring.

Align the top pig tail of the new spring with the isolator, reinstall your strut mount, and loosely tighten the 21-millimeter nut. Remember to remove your spring compressor from your new Eibach spring.

To reinstall the front strut, start by sliding the strut mount bolts through the strut tower and loosely tighten the three nuts. Slide the strut bolts through the strut and tighten those as well. Reattach your ABS wiring clamps. Reinstall your sway bar end link and tighten it down.

And then go back on with your brake rotor and caliber. When we tighten down the three strut tire nuts, the strut mount nut, and then reinstall your thread cover. Complete the same steps for the other side.

To remove the rear springs, start by placing a jack under the IRS subframe. Fully remove the two subframe bolts with a 22-millimeter socket and partially remove the front subframe bracket bolts with a 13-millimeter socket.

Since we are essentially dropping the IRS subframe, remove the brake line bracket with a 13-millimeter socket so it has some wiggle room. Remove the two bolts that hold the rear shock mount to the chassis with an 18-millimeter socket.

If needed, lower your jack down some to give you a little more room to remove the rear spring. Pull down on the lower control arm a tad and remove the rear spring. With the spring removed, take off the plastic thread cover from the top of the shock, and remove the shock mount nut with a 15-millimeter socket.

Slide out the dust boot and factory bump stop. With the supplied yellow bump stop, slide it over the shock with the flat side facing up. Then slide the factory dust boot over the new bump stop. Next, install the new Eibach spring and make sure both the top and bottom isolators are aligned with their spring pig tails.

Jack up the IRS subframe and reinstall the shock mount, shock mount nut, and plastic thread cover. Reinstall the brake line bracket, and jack up the IRS subframe until you can align it with the bolt holes in the bottom of the chassis.

Tighten down the two subframe to chassis bolts and the two bolts on the front subframe bracket. Do the same for the other side and you're done.

Installation should take you about two to three hours if you're working off of jack stands and about an hour to an hour and a half on a lift. After installation, we re-measured from the ground to the top of the fender and achieved 27 1/2 inches in the front and 28 inches in the rear. Those results are good for an inch drop up front and a half inch out back.

For more 2015 Mustang how-tos, subscribe to our YouTube channel and of course, pick up your Eibach lowering springs from latemodelrestoration.com.