I have a 2018 LT and would like to increase the suspension travel. I don’t know what modification(s) I should do to achieve this. Are there companies that make extended control arms, do I just get new coilovers, or do I try to do both? Any help would be greatly appreciated!
If you search the forum here for "lifted" there was a thread or two regarding this. If I recall, at least one owner used parts from a Buick Encore or Chevy Trax which is really on the same platform as our Sonics. . . . just a bit taller and heavier.
Try this thread. . there are more but pictures in the threads may be missing.
http://www.sonicownersforum.com/forum/threads/sonic-lift-kit-how-to.22713/
Here is a write up of a lifted setup on a 2012 Sonic Hatch from several few years :
The goal of this lift was to be a safe and reliable method to raise the Sonic. I’m an ASE certified mechanic and do my best to make sure the things I do to cars will not be dangerous and hope that people who use this method do so responsibly and take the time to make sure everything is installed correctly and tightened to spec to prevent failures. If you install this on your vehicle incorrectly and there is an undesirable outcome, you take sole responsibility.
I sold my old setup to JNizza92 aka Jordan and he was kind enough to provide detailed pictures of him installing it on his Sonic and also another way of installing the rear strut mounts.
Backstory:
The reason I pieced together this lift a few years ago was because I had already lifted my Sonic for the 2012/2013 winter (mainly for Sno*Drift) using Megan Racing adjustable coilovers that I had been using to lower my Sonic (their intended use).
After one Michigan winter the threads on the coilovers adjustable spring perch and knuckle had become so corroded that they were basically welded together. Instead of purchasing new coilovers specifically for off road use I wanted to find a solution that was cheaper in the long run but may have a higher upfront cost. The Chevy Trax came out that year and I was eyeing the suspension, even going into dealer lots and climbing under them to see how everything worked (which they apparently frown upon). It all looked pretty identical so I decided to give it a shot. I looked on the forums later to see if anyone had tried it before I went and spent a good deal of money on it but no luck, this is what I came up with for the 2013/2014 winter. It turned out pretty awesome!
The parts list:
Front
• GM 95218483 – Front Springs - $40~ each
• GM 95022484 – Front Mounts - $30~ each
• 560812 – Right Front Strut - $120~
• 560811 – Left Front Strut - $120~
Rear
• GM 95174968 – Rear Springs - $35~ each
• 5699 – Rear Shocks - $40~ each
• GM 96853910 – Right Shock Mount - $25~
• GM 96853909 – Left Shock Mount - $25~
Wheels & Tires
• LT215/75R-15 BFGoodrich Mud-Terrain T/A KM2 - $160~ each
28” Diameter
• 15x6.5 Sport Edition SE-17 Anthracite - $80~ each
• 42mm Offset
The install is pretty straight foreward but technical knowledge is highly recommended.
Tools needed:
Jack and jack-stands
Spring compressors or a shop
Bench Vice and rubber strap wrench (or vice grips in a pinch)
23mm socket (front strut top nut)
21mm deep socket and short socket (knuckle bolts)
18mm deep socket (swaybar endlink nuts and rear shock lower bolts)
15mm socket (rear shock top mount bolts and shock shaft nut)
Large hammer or mini sledge
1) Start off by breaking all the lug nuts loose, raising the vehicle and supporting it on jack stands. Remove the wheels and set them aside.
2) Pop the hood, remove the plastic retainer clips in the rain channel of the cowl, the foam pads on each side, and the small 7mm screw hidden under a cover in the center of the cowl.
3) Pop the caps off the wiper arms, remove the 15mm nuts, wiggle the wiper arms to release them from the splines and set them aside.
4) Remove the two rubber guides that go from the top corners of the cowl to the windshield. They are held in just by rubber tabs and should remove easily.
5) Remove the cowl and set it aside.
6) Remove the 18mm nut from the sway bar endlinks on both sides that attach to the strut assembly, push the endlink through the hole so it is free to move around.
7) Loosen the two 23mm knuckle nuts on each strut. NOTE: the bolt is SPLINED so it will NOT turn. Only loosen the nut! Once the nut is backed off about 3mm, tap the nut side of the bolt to push the bolt toward the other side. This will free the clamping pressure on the strut and allow it to move more freely. Once the bolt is loose, remove the two nuts and bolts from the knuckle. The hub and sway bar endlink should be free from the strut assembly and you should be able to rotate the strut if needed. Don’t forget to unclip the brake hose and abs wire from their brackets on the strut!
a. Tighten Knuckle bolts to 81 lb ft
b. Strut shaft nut to 48 lb ft
c. Endlink nut to 48 lb ft
8) Once the strut is free from its lower constraints, remove the top 23mm nut holding the strut and spring assembly to the vehicle. This nut DOES NOT hold the spring compressed, it just mounts it to the strut tower. Once this nut is removed, the assembly should be easily removed from the car. You may want to hold the strut from the bottom while you take the last few threads of the nut off so it doesn’t fall. If your control arm bushings are stiff, you may need to apply downward pressure on the knuckle to make room for the assembly to come out.
9) If you have a QuickStrut Assembly (where the assembly comes with the spring, strut, and mount pre-assembled), You can just do steps 2-8 in reverse. I sold the kit to Jordan with the fronts all pre-assembled so it was just a matter of taking the old ones out and putting in the new assembly. NOTE: If you value your control arm bushings, Loosen the lateral control arm bolt so the horizontal bushing can rotate freely before putting in the new assembly. Once the vehicle is back on the ground with full suspension weight, re-torque the lateral bushing. This will prevent the bushing from being over-rotated from the ride height and travel and stop it from tearing.
a. Fun fact: You don’t need to lift the vehicle to fit under it with the lift and mud tires! So you can just tighten it from the ground.
10) If you DO NOT have a QuickStrut assembly, you will need to either transfer your old strut mounts or assemble all the new parts.
a. I HIGHLY recommend having a shop assemble the front springs and struts for you. The Buick Encore springs are MUCH stiffer than the Sonic’s and exponentially sketchier to use the Autozone spring compressors on.
b. If you are assembling these yourself: The compressors must be used with the bolt head side toward the LOWER spring perch. The lower perch is too wide to allow the compressors to clamp down without the shaft spinning into the perch and you will not be able to get the upper mount installed. You must have the nut towards the lower perch and basically tighten it by hand to get it compressed enough. An alternative method is to compress the spring before putting it on the strut, install the mount, and back the compressors off by hand. Atleast this way you can compress this springs with an Impact Gun and save some time and muscle fatigue.
c. IF your springs come from GM like mine, the will be slightly bowed out, like the shape of a banana. To compensate for this, the Buick Encore struts have two Seats for the spring end to sit in. You will want to orient the spring so that when it decompresses, the pressure will straighten the spring back out. If you do not, the spring will be bowed out excessively and contact your strut tower with a horrible noise.
