Soften Up the Ride

Suspension, brake, and hydraulic/electric steering discussion.
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yargnits
Posts: 265
Joined: Fri Dec 04, 2015 4:36 pm
Location: Northern Indiana

Re: Soften Up the Ride

Post by yargnits » Thu Mar 21, 2019 12:21 am

That was easier than expected. Here’s was bushings look like with less than 30k on them.
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939B1B54-C11B-4C24-A9D3-CB1B25AC683A.jpeg
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Dave B - Yargnits
--
2011 Caprice 9C3
2011 Honda Oddysey
2004 GMC Yukon
2005 John Deere (garden tractor)

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

Re: Soften Up the Ride

Post by CrashTestDummy » Thu Mar 21, 2019 3:00 pm

yargnits wrote:
Wed Mar 20, 2019 7:02 pm
All the parts are in and I had just enough time last night to put the car on stands last night. It's time to start taking things apart.

Dummy, I got a pair of Whitelines that come with new bearings and a single washer. Whiteline's instructions say to re-use the existing top washer.
strut top diagram.PNG


Looking at all the parts diagrams online for 2011-2017 PPVs shows both the top and bottom washer are the same part number (90223654).

In October 2016 GM said here https://gm.oemdtc.com/6697/front-strut- ... aprice-ppv that the top and bottom are now different part numbers and neither of them are the original part. They're actually the washers for the SS struts. 92273396 for the top washer and 92421239 for the bottom washer. Otherwise this may happen:
yikes.jpg

I'm inclined to buy the new top washers, but wonder if the bottom washer supplied by Whiteline is good to use. I plan on emailing them this question.

The Whiteline instructions also state that I must use new knuckle bolts, as the old ones are stretched, I can see the logic in that, but don't recall many mentioning that.
Ouch! I bet that was quite some rattle up front! If the Whiteline washer fits properly on the shoulder of the strut shaft, I see no reason not to use it. I'd probably replace the upper washer if the OEM one is rusted, which they tend to be. Otherwise, the metal molded into the upper strut bushing should take the load off the upper washer.

The strut-to-spindle bolts are torque-to-yield, so it may be a good idea to replace them. I don't understand TTY bolts, though. It seems like quite a waste to me. I did reuse the strut to spindle bolts on our '12, and have seen zero issues. The strut-to-spindle bolts on our 3rd Gen F-body and 86 SVO are not TTY, and I've experienced zero issues reusing those.

But for liability mitigation, get new bolts.
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?

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yargnits
Posts: 265
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Location: Northern Indiana

Re: Soften Up the Ride

Post by yargnits » Mon Apr 08, 2019 12:57 am

Finally done.

I took my time doing front then rear. I snapped a photo when I pulled the car out to reposition it in the garage. Having just the front done gave the car a small rake, which would be cool if I wanted to follow up with taller rear rims/tires.

Here it is with just the front lowered...
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Finished the rear after a business trip and rolled it out yesterday. The road bumps don’t hit as hard but it’s still very firm. For review, I have Eibach springs with the severe service Monroe dampeners on all 4 corners. I also put Whiteline front strut bushings. BTW, my old bearings came out perfect.

Here it is after the job was done...
FA6A620F-9972-4156-92D9-EE5647BD0087.jpeg
FA6A620F-9972-4156-92D9-EE5647BD0087.jpeg (259.72 KiB) Viewed 6761 times
The rear camber is visably off, but I want to drive it around for a couple weeks before getting an alignment to allow settling. Where do I go for a wheel alignment; a GM dealer, or someplace like Belle Tire? I have detailed alignment instructions from another forum, do I offer them up to the shop?
Dave B - Yargnits
--
2011 Caprice 9C3
2011 Honda Oddysey
2004 GMC Yukon
2005 John Deere (garden tractor)

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kevink
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Re: Soften Up the Ride

Post by kevink » Mon Apr 08, 2019 1:52 am

I was cruising around on the trashed roads of Pennsylvania and realized that these rear tires softened up the ride of my 2011 9C3 just dandily.

Image
2011 9C3: 11.48 @118.

ig109
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Joined: Wed Feb 11, 2015 2:41 am

Re: Soften Up the Ride

Post by ig109 » Thu Sep 05, 2019 2:36 pm

yargnits wrote:
Mon Apr 08, 2019 12:57 am
Finally done.

I took my time doing front then rear. I snapped a photo when I pulled the car out to reposition it in the garage. Having just the front done gave the car a small rake, which would be cool if I wanted to follow up with taller rear rims/tires....

...The rear camber is visably off, but I want to drive it around for a couple weeks before getting an alignment to allow settling. Where do I go for a wheel alignment; a GM dealer, or someplace like Belle Tire? I have detailed alignment instructions from another forum, do I offer them up to the shop?

I went to belle tire for an alignment and they did a great job. I need to get a set of aftermarket camber bolts for the car with the H&R springs.

Did you end up using G8 struts or what?

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yargnits
Posts: 265
Joined: Fri Dec 04, 2015 4:36 pm
Location: Northern Indiana

Re: Soften Up the Ride

Post by yargnits » Fri Sep 06, 2019 12:42 am

I put in new Monroe Severe Service struts. The ride isn’t much different from the stock struts, but the handling seems better from being lower.
Dave B - Yargnits
--
2011 Caprice 9C3
2011 Honda Oddysey
2004 GMC Yukon
2005 John Deere (garden tractor)

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