rear cradle bushings

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Navy Lifer
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Location: Canton GA

rear cradle bushings

Post by Navy Lifer » Wed May 17, 2017 5:25 am

Came across something that may interest some 2011-2013 (WM) PPV owners. These parts are already on 2014-2017 PPV's.

Stories here:
https://www.holden.com.au/cars/commodor ... motorsport" onclick="window.open(this.href);return false;
"With a unique rear suspension subframe bush, the Motorsport has impressive rear suspension location control so you can feel confident under maximum lateral and braking events."

http://www.motoring.com.au/final-aussie ... ons-105535" onclick="window.open(this.href);return false;
"The Motorsport Edition alone swaps to a higher-rate rear subframe bush sourced from the US police car program [PPV] that applies a constant radial rate, rather than the different cross-car and fore-aft rates of the previous bush. Pinnuck says this provides better driver feedback on the limit laterally and under braking."

Current PN's for 2014>2017 sedans - same parts used on PPV (WN) & Chevy SS - and will backfit to WM chassis
92457826 - rear position (qty 2) - http://www.gmpartsdirect.com/oe-gm/92457826" onclick="window.open(this.href);return false;
92457827 - front position (qty 2) - http://www.gmpartsdirect.com/oe-gm/92457827" onclick="window.open(this.href);return false;

xcidmigs
Posts: 679
Joined: Sat Feb 14, 2015 2:12 am
Location: SE PA

Re: rear cradle bushings

Post by xcidmigs » Wed May 17, 2017 1:31 pm

I have to wonder if you can really feel any big difference unless you are talking about a 100K+ mile car that was used on patrol. Regardless bill good find. I can tell you from experience those bolts are a PIA to remove but its doable, anyone in the salt belt area I would highly suggest checking yours if not actually just removing them at some point and checking for rust etc. I believe at least 1 member here had an issue with one of them not coming out and the dealer having to perform some surgery on the body or cradle. I also don't know that those bushings just pop out when I was looking at mine I believe they were a press fit piece?

CrashTestDummy
Posts: 1719
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: rear cradle bushings

Post by CrashTestDummy » Wed May 17, 2017 2:10 pm

Not sure if you're referring to me, or not, but yes, if your car is in/came from the Great White North, it's worth it to at least check the cradle-to-body bolts. When our car was in for the fuel pump recall, it took an additional couple of weeks working on getting one bolt out. I believe they eventually got enough leverage on it to get it loose, but it took quite a bit of work.

Additionally, when replacing the passenger side battery, I discovered that the ground strap bolt was rusted into the trunk floor, causing it to snap when I tried to remove it. So, yeah, really check things over.

Those bushings are press-in, but I seem to remember reading some of the posts on the G8 forums that this bushing isn't terribly bad to R&R. I think getting the bolts out and getting room to work is the hardest part, from what I've read.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

Navy Lifer
Administration Staff
Posts: 1487
Joined: Tue Mar 19, 2013 11:30 pm
Location: Canton GA

Re: rear cradle bushings

Post by Navy Lifer » Wed May 17, 2017 5:21 pm

xcidmigs wrote:I have to wonder if you can really feel any big difference
I know that since "Day One", it was clear that in transitional movements that heavily load the rear, I can feel the back of the car (2011) doing something a little weird, and it's not based on tire slip--it's the cradle moving in relation to the body. If the later-spec cradle bushings help with that, I'm interested.
CrashTestDummy wrote:Those bushings are press-in, but I seem to remember reading some of the posts on the G8 forums that this bushing isn't terribly bad to R&R. I think getting the bolts out and getting room to work is the hardest part, from what I've read.
One reputable source big in the Camaro world says "go solid"--I do not know whether this option (for Camaro) will work on sedans, nor do I know if there are NVH issues with eliminating the compliance that the production bushings offer. While not applicable, the 2017 Camaro ZL1/1LE (Alpha platform) has solid cradle bushings as part of the production package.
http://pegasuscnc.com/5th-gen-camaro-20 ... minum.html" onclick="window.open(this.href);return false;

xcidmigs
Posts: 679
Joined: Sat Feb 14, 2015 2:12 am
Location: SE PA

Re: rear cradle bushings

Post by xcidmigs » Wed May 17, 2017 9:46 pm

wouldn't a poly replacement be a good compromise between? NOt sure if anyones version will work though, I went through this with BMR thinking their poly inserts for a camaro would work and they do not.

http://www.bmrsuspension.com/siteart/install/BK024.pdf" onclick="window.open(this.href);return false;

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

Re: rear cradle bushings

Post by Navy Lifer » Wed May 17, 2017 10:19 pm

There are options--here are listings for G8 and/or SS and, by association, Caprice--depending on brand & look-up data.

Replacement bushings:
https://whitelineperformance.com/pontia ... ing-w93165" onclick="window.open(this.href);return false;
http://superpro.suspension.parts/spf3918k" onclick="window.open(this.href);return false;

Inserts:
https://whitelineperformance.com/pontia ... ing-w93166" onclick="window.open(this.href);return false;
http://superpro.suspension.parts/spf2871k" onclick="window.open(this.href);return false;
http://superpro.suspension.parts/spf2872k" onclick="window.open(this.href);return false;

If there was the option, I would choose a Delrin material over polyurethane.

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