WM and WN suspension differences

Suspension, brake, and hydraulic/electric steering discussion.
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BluesBro
Posts: 45
Joined: Tue Aug 03, 2021 6:26 am

WM and WN suspension differences

Post by BluesBro » Fri Sep 17, 2021 3:25 pm

Nasty clunk coming from the left front of my car, sooner than I wanted, but its time to dig into the suspension. At 86k I'm sure the struts are shot, springs are disintegrating, strut mounts are likely toast. I could spend 200$ on poly strut mounts, 300ish on struts, and another 200-300 for springs, plus hardware and bushings, or I can just bit the bullet and do the coil-overs I want. I have had BC coil-overs on other cars in the past and I am not a fan of the ride or longevity. My dads 2013 has the Pedders extreme XA kit and the ride is fantastic and has held up great for the 30k+ miles so far.

On to the questions, what are the major differences from WM to WN? Pedders has an application for the 2011-2013 cars but does not list a kit for the 2014+. They do however have an SS kit. I worry a bit that the SS kit will have a lower "center" and end up being very low even adjusted up. I do need a bit of height, I live in a rural area the occasionally requires ground clearance.

WM Kit - https://pedders.com/products/160064-ext ... -2008-2009

SS Kit - https://pedders.com/products/160094-ext ... evrolet-ss
2014 Caprice PPV 6.0L - TSP Stage 1 Cam, Solo 3in Mach Cat Back, HP Tuned
2002 Avalanche 5.3L - MBRP Exhaust, RC 6in Lift

Navy Lifer
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Joined: Tue Mar 19, 2013 11:30 pm
Location: Canton GA

Re: WM and WN suspension differences

Post by Navy Lifer » Sun Sep 19, 2021 6:06 am

1. Sway bars are larger with WN
2. More aluminum parts in suspension
3. Front knuckle is wider where it fits into clevis on strut - same as VF
4. OE springs may provide slightly higher ride height in WN

You shouldn't have any issue fitting the Pedders coil overs on the PPV.

There is a coil-over kit by H&R for 2014 SS that is another option to consider. https://www.hrsprings.com/application/s ... Suspension
Generally available for under $1300

BluesBro
Posts: 45
Joined: Tue Aug 03, 2021 6:26 am

Re: WM and WN suspension differences

Post by BluesBro » Mon Sep 20, 2021 2:21 pm

Thanks for the info, the knuckle attachment being wider is an interesting difference.
2014 Caprice PPV 6.0L - TSP Stage 1 Cam, Solo 3in Mach Cat Back, HP Tuned
2002 Avalanche 5.3L - MBRP Exhaust, RC 6in Lift

Navy Lifer
Administration Staff
Posts: 1699
Joined: Tue Mar 19, 2013 11:30 pm
Location: Canton GA

Re: WM and WN suspension differences

Post by Navy Lifer » Tue Sep 21, 2021 2:29 am

the front knuckle changed from cast iron/steel to aluminum with VF/WN update - so GMH increased the width of the knuckle where it fits into the clevis on the strut for equivalent strength to the VE/WM version.

BluesBro
Posts: 45
Joined: Tue Aug 03, 2021 6:26 am

Re: WM and WN suspension differences

Post by BluesBro » Tue Sep 21, 2021 1:58 pm

Navy Lifer wrote:
Tue Sep 21, 2021 2:29 am
the front knuckle changed from cast iron/steel to aluminum with VF/WN update - so GMH increased the width of the knuckle where it fits into the clevis on the strut for equivalent strength to the VE/WM version.
Ah, makes sense.
2014 Caprice PPV 6.0L - TSP Stage 1 Cam, Solo 3in Mach Cat Back, HP Tuned
2002 Avalanche 5.3L - MBRP Exhaust, RC 6in Lift

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