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Old 03-30-2016, 04:34 PM
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Dampener / Coil question

After reading much through these forums, I have decided to purchase Koni FSD Dampeners to replace my factory sponges. I am replacing the coils also. The vehicle is a '07 WK 5.7 Limited, with 89k miles, and mostly original.

I kept seeing people recommend the OEM SRT Bilstein's, and that seemed to be the best option until I found reviews of the Koni's. So the Koni's are ordered.

Next I contacted the nearest Jeep dealership and found the OEM SRT Springs. I was quoted 120$ each for the fronts, and just under 100 each for the rears.

So here is my current quandary: The dealership gave me quotes for all 8 isolaters, and its it around 175$ total. Problem is, I am not sure if I should be using the WK isolaters, or the SRT isolators, or if there is a difference. If the SRT coils fit right in, then I would assume the WK is the same and this does not matter. I need to verify though please?

Here is the SRT vincode she required, in case its useful to anyone else:
7C620714. (Last 8 of vincode)

Dealership SRT springs
Front Springs: 5290629 $120 each
Rear Driver side Spring: 5290638 $96
Rear Passenger side Spring: 5290?73 $95
...pen smeared...
When I lookup the part numbers by searching 'mopar #######', I get some rockauto listings, but their part numbers have additional letters on them like 'AB'. Anyone know a better place to order the SRT springs, so that I dont have to pay outrageous dealership prices?

I would like to personally thank
Scottina06
dmsfun
jeepgarage.org
and anyone who reads or responds

for their contribution to this forum

Thanks for any help you guys can offer!

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Old 03-31-2016, 10:55 AM
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Re: Dampener / Coil question

Before you buy lowering springs, you need to check with Koni US about use of them with the FSD's. IIRC, they work with stock height, and with LESS THAN a 1 inch drop, but 1 or more inches is not suitable. The SRT Bilsteins on the other hand do not work with stock springs, as they are too short, so lowering springs are needed. autopartsmopar.com has much better prices than stealers.

Also, you have to remove the upper control arms to install the FSD's since the body's are longer than OEM. Might as well buy new Moog problem solver upper control arms (rockauto.com best prices) and have them installed since you are already paying for the labor. The OEM arms have crappy sealed balljoints which fail, low quality bushings, and cheap metal castings. Moogs have higher quality steel, far better balljoints which are greasable, better bushings designed to last much longer, improve ride, handling, and steering. These with new Mevotech premium lower control arms, stock springs and FSD's give my WK a super ride, very smooth and controlled, nothing like stock.
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2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper Discoverer SRX 255/65/17, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.
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Old 03-31-2016, 11:45 AM
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Re: Dampener / Coil question

Hi dms, and thanks for your reply!

Thanks for the tip on the ride height of SRT springs, I have no intention of dropping the vehicle.
So I guess I need to just get stock springs for WK?
Did you end up replacing your isolaters? (8 of em)

Is this the upper control arm you are suggesting?
More Information for MOOG CK620188
Are there any issues like this installing the rears?

Performing all the labor myself.
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Old 03-31-2016, 11:47 AM
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Re: Dampener / Coil question

With 89 k miles, your close to having bad balljoints if not already, on the OEM upper and lower control arms; 3 of 4 on mine went south before 100k. Best route is upgraded control arms from Moog (K series, not R series) and Mevotech premium. Also your sway bar end links are toast by now if they are original, and Moogs are better than OEM. I'm on my 3rd set with 119k. You should also get Moog swaybar to frame bushings; better material and better handling than using OEM, and last a lot longer.
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2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper Discoverer SRX 255/65/17, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.
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Old 03-31-2016, 11:58 AM
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Re: Dampener / Coil question

Quote:
Originally Posted by KHustoms View Post
Hi dms, and thanks for your reply!

Thanks for the tip on the ride height of SRT springs, I have no intention of dropping the vehicle.
So I guess I need to just get stock springs for WK?
Did you end up replacing your isolaters? (8 of em)

Is this the upper control arm you are suggesting?
More Information for MOOG CK620188
Are there any issues like this installing the rears?

Performing all the labor myself.
Well the SRT springs do drop the height, I just don't know how much and what the limit for FSD's are. FSD's raise the ride height about 3/4 in over stock with stock springs, which i really like, a mini lift.
I installed WK stock front lower spring isolators and Moog front strut mounts, rear upper and lower stock WK isolators. Also got new OEM springs.
Yes, the CK series control arm is the top dog from Moog, the R series is OEM quality with sealed balljoint, stock rubber bushings.
I also removed the SRT sway bars and went back to stock. The ride is now fantastic, but can't quite hang in high speed corners like with the SRT bars. Our roads are nowhere near smooth here, and got tired of feeling every bump with the SRT bars.
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2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper Discoverer SRX 255/65/17, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.
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