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Old 09-05-2011, 01:08 PM
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Thumbs up 2012 SRT8 Jeep wk2 suspension info

The SRT8 front suspension is very similar to the standard front wk2 suspension but some components have been modified for unique ride, handling, and steering performance.

The Active Damping System (ADS) front shock assembly (1) is similar to a conventional coil over shock with the addition of a shock solenoid assembly (3) mounted on the side of its body with a three wire harness/connector (2) attached to it. Although serviced the same, the components of the SRT8 shock assembly are unique to this vehicle. The front shock absorber is manufactured by Bilstein®. Because the shock absorber is a mono-tube design, it is important to handle it with care and not support the shock by its tubular housing.

The front knuckle (8) for the SRT8 is different from the standard knuckle. Although similar in appearance, the knuckle has been modified to accept the larger tire and wheel assembly. Also, the mounting bosses for the disc brake caliper have been moved to allow for mounting of the Brembo six-piston disc brake caliper (2).

The front stabilizer bar diameter has been increased for the SRT8. It is serviced in the same manner as the standard bar.

Vehicles equipped with the ADS includes an Active Damping Control Module (ADCM) which is located beneath the LF seat where it is concealed beneath a cover panel. The ADCM receives multiple signals on the CAN bus as well as three active damping sensors. Two sensors are located on inside of the frame rail directly behind the radiator and one is mounted in the rear underside of the vehicle near the park brake cable tensioner. The sensors are 3 wire, 5V reference sensors wired directly to the ADCM.

SRT8
The SRT8 vehicles suspension system operates the same as standard suspension except the addition of the Active Damping System (ADS).

There are two operating modes of the ADS, Auto and Sport (referred to as Firm). At each ignition key on cycle, the vehicle defaults to Auto mode. The Drive Train Control Module (DTCM) communicates the request for the Firm mode to the ADCM when the terrain select switch is placed in either the Track, Sport or Snow positions. When the Firm mode is selected, the suspension has unique handling characteristics.

An Active Damping Control Module (ADCM) controls the suspension and ride for the SRT version of this vehicle by adjusting the rebound and jounce of the shock assemblies using the above information and predetermined matrix's for maximum vehicle control. The shock absorbers are unique to the Active Damping System (ADS). Each shock absorber has a valving unit that is external, but still part of the shock absorber. Inside each valving unit are two solenoids that control the damping valves to alter the ride of the vehicle. The shocks are replaced as an assembly, they cannot be disassembled for repair.

Additionally, there are three active damping sensors, two in the front of the vehicle and one in the rear. These sensors measure the plane of the vehicle.



The SRT8 rear suspension is very similar to the standard rear suspension but some components have been modified for unique ride, handling, and steering performance. Service of all rear suspension components remain the same as the standard components. When components differ, be sure to use only SRT8 components on SRT8 vehicles.

The rear knuckle for the SRT8 is different from the standard knuckle. Although similar in appearance and in service, the mounting bosses for the disc brake caliper have been moved downward to allow mounting of the Brembo four-piston brake caliper.
SRT8

The rear stabilizer bar diameter has been increased for the 2012 SRT8
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Old 09-09-2011, 07:08 AM
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Re: 2012 SRT8 Jeep wk2 suspension info

Cool, thanks for the info! I find it surprising that it activates "firm" mode in the snow setting though. Why would you need firm setting for snow when the roads would be bumpy with the snow pack?
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Old 09-09-2011, 07:37 AM
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Re: 2012 SRT8 Jeep wk2 suspension info

^jeeps, i would guess firm keeps the rig more stable with less roll to lessen abrupt weight shifts in slick conditions. In the WK2 with quadralift, we use normal or aero ride height in snow mode to keep the truck a bit lower and more stable. Off road settings with max suspension height are only tapped if the snow is really deep and it is slower going.
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Old 09-09-2011, 08:11 AM
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Re: 2012 SRT8 Jeep wk2 suspension info

Quote:
Originally Posted by Jeeps View Post
Cool, thanks for the info! I find it surprising that it activates "firm" mode in the snow setting though. Why would you need firm setting for snow when the roads would be bumpy with the snow pack?

When I have driven my Parent's Merc GL450 with adj suspension in the snow it is much more responsive in the stiff sport setting, it feel's disconnected in comfort or normal mode's.
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Old 09-10-2011, 10:08 AM
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I'd say the least amount of body roll is most advantageous in slippery situations. The more contact on all 4 tires the better off you are. I'm surprised its not set to firm for tow mode.

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