Re: easiest way to change a spring on the rear shock on...
The easy way is the only way, you have to remove the shock from the frame, unscrew the spring and its perch should slide over the shaft at the rebound knob end (red knob). Be careful not to nick or scratch that shaft on the way in or out!! Put everything back together, screw the spring down so that the perch (support plate) has it's little slot in top of the red knob and the last bit of the coil (the part that is cut) is on the other side of the perch. Torque it down to 120in/lbs and go a ride!
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the easiest way to replace the spring is to actually replace the spring and strut assembly together. most parts stores sell what they refer to as a "quick strut assembly". all you would do at that point is unbolt the old strut assembly and bolt the quick strut one on. no need to compress the spring to replace the strut etc. the process would involve removing the wheel, removing 4-5 bolts, removing the old assembly and then bolting the new one on. the complete assembly at autozone should run you about $130-140. good luck with it
Rear shocks would be in the boot or back seat - just unbolt and replace, you will have to remove both wheels. Front shocks may need a spring compressor if the shocks are inside the road spring, DO NOT ATTEMPT FRONT SHOCKS WITHOUT A SPRING COMPRESSOR YOU WILL GET SERIOUSLY HURT!!!
There has been a service bulletin for that type of concern. Here is what it states.
Suspension - Rear Suspension Is Low/Sagging/Uneven
Bulletin No.: 06-03-09-006B
Date: December 15, 2008 Subject: EI06006 - Rear Suspension Uneven, Sagging, Low (Recalibrate Air Spring Sensor)
Models: 2006-2007 Buick Rainier 2006-2007 Chevrolet TrailBlazer SS 2006-2007 GMC Envoy, Envoy XL 2006-2007 Saab 9-7X
with Suspension Pkg - Rear Load Leveling (RPO G67)
This bulletin is being revised to update the labor operation in the warranty information. Please discard Corporate Bulletin Number 06-03-09-006A (Section 03 - Suspension).
Some customers may comment on the rear suspension being uneven or sagging.
DO NOT REPLACE THE COMPRESSOR.
Based on technician feedback, engineering has determined that the customer's concern can be corrected by recalibrating the air spring sensor. Refer to the Trim Height Uneven or Low diagnostics and Air Spring Sensor Calibration procedure found in SI.
jack it up so the rear axle is off the ground. unhook the ebrake cables at the vehicle unbolt the rear driveline remove the rear wheels unbolt the rear shocks with the jack under the center of the rear end, disconnect any anti lock wiring plugs remove if it has leaf springs remove the u bolts that bolt the rear end to the spring by taking off the nuts from the bottom. lift out rear assembly . If it has springs remove the springs after the shocks are unmounted from the rear axle. piece of cake reverse the procedure
You can change it. Im looking for the correct amount to do it myself. I already pulled mine apart and bought a rebuild kit for it. Comes with a new nitrogen bladder, o rings for the seal, and a few other necessary items. Just remember to measure where the jam nuts holding your spring is so you can put it back in the correct location. As for the nitrogen i heard 150 psi. I'm fortunate to work at an offroad racing shop so i'm just gonna fill mine with nitrogen there, but i dont think you should get charged too much at a regular bike shop. Rockymountainatv.com has the rebuild kit. You will need the seals atleast. If i find anything else out i'll let you know. Hope this helps.
No. But if can't get it on a lift or high enough to work under comfortably..it will be very awkward. The calipers get in the way when you are removing the springs and shocks as a unit. You can move the part and get it out and down, but you will need to remove the rear wheels and let the rear springs hang down. Make sure you have a good spring compressor to get the old springs off....in most cases it is the springs that go soft and not the shocks... Don't assume that it is the shocks unless you know for sure they are bad.
This is a dangerous job if you do not have the proper equipment for compressing the spring that is around the rear shock. I do not recomend performing this job without the proper equipment. Unloading the spring without it compressed can cuase injury.
If you have the proper equipment this is how you do it.
REMOVAL - SHOCK ASSEMBLY
NOTE:Access for the nuts attaching the rear shock assembly upper mount to the vehicle is through the inside of the trunk.
Roll back carpeting on top of the rear shock tower to access shock mounting nuts.
Remove plastic cover from the top of the shock assembly.
Remove 2 nuts attaching the shock assembly upper mount/spring seat to the shock tower.
Raise vehicle on jackstands or centered on a frame contact type hoist.
Remove the rear wheel and tire assembly from the vehicle.
Remove two fasteners holding the splash shield to the shock assembly upper mount.
Remove bolt attaching shock absorber to rear knuckle
Remove the shock absorber from the rear knuckle first when removing the shock absorber from vehicle by pushing down on the rear suspension.
Move shock assembly downward and tilt top of shock outward, then remove shock assembly from vehicle through top of wheel opening.
they are simple to change however you will need a spring compressor.
1 jack car and use axle stands to support the car. 2 remove wheel 3 behind drum or disc break assembly you will see shock absorber assembly 5 remover lower but (it may be very tight due to corrosion and time). 6 undo top nut located in boot around the top of the wheel arch. This may require the removal of some interior trim. 7 compress spring using spring compressor (use device instructions as these vary from type to type) 8 Undo top nut on the shock absorber assembly, remover cap spring and other rubbers.
Reinstalling is basically the instructs in reverse.