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Old 12-05-2017, 07:29 PM   #1
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Chevy P12 Questions

Hi all, recently acquired a 1998 Pace Arrow Vision with the apparently very rare P12 chassis. All of the running gear is in great shape however I experienced some porpoising on our maiden voyage. Looking for some chassis part information as someone replaced the shocks with bus shocks and the leaf spring dampeners/bump stops are gone. With 65kmi, the plan is to replace and/or upgrade the front suspension. Any assistance is greatly appreciated.
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Old 12-08-2017, 11:58 AM   #2
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Sorry no one has replied in the past 3 days. I'd contact Ultra RV for help. Shocks are listed for most RVs at ShockWarehouse. Another source of suspension parts is Michigan Truckspring.

Good luck and happy travels!
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Old 12-08-2017, 12:30 PM   #3
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May not be many of them out there. Never heard of one before. I have been asked when buying parts for my 98 P32 if it had coil or leaf springs. I just thought the counter guy didn't have a clue what he was looking up.
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Old 12-08-2017, 12:51 PM   #4
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Never heard of P12 but P32 yes
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Old 12-08-2017, 01:14 PM   #5
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Chevy P12 chassis was used by large Class A RV makers because it had a higher capacity than anything Ford offered in those years. Chevy/GMC sold RV chassis making to Workhorse, which didn't buy all Chevy/GMC chassis models and rebrand as Workhorse.

Here's a set of Service manuals for the P12.

To the OP, see, no response for 3 days, but as soon as it got bumped, folks weigh in!
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Old 12-08-2017, 01:46 PM   #6
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there is a Yahoo "group" specifically for P12 owners. You may need to open / join Yahoo and search for the group if this link does not work for you:

https://groups.yahoo.com/neo/groups/...sis_Group/info

It isn't very active, but I believe it may be the best source for info about your chassis. The group leader is / was "Steady Eddie" (not me) so you may search for him as well on Yahoo. Good luck, Ed
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Old 12-11-2017, 09:56 PM   #7
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Hi All, Thanks for the responses. Yes indeed it is a rare frame and I am working through finding parts and upgrades in many forums and chats. Apparently Steady Eddie is not online at this point. The Yahoo group is still there but no response on request for access and no group activity since early last year.

As point of reference Chevy made the P12 MH chassis for 1998 and 1999 while also making the P32 at the same time. It has the L21 7.4L (454), the M542N Allison, 21,000 GVW chassis, 208"WB, Dana rear, I-Beam front suspension.

Chevy used many stock parts from other HD vehicles in the design so according to the local GM place they can get whatever I need at a huge $$ I am sure. The shocks are not on any other Chevy that I can find but Koni and Gabriel make them. It came with a steering dampener (OEM) that was also used on other trucks.

I had it at a local truck/MH repair place that does mainly DP's (tranny fluid and filter). They had a 2003 MH on a W20 there in the shop. They look very very similar. They both have the I-Beam front suspension, Square tube sway bar, 22.5 tires, looked like the same 208" WB. Measured spring lengths, shock distances, etc... and they matched up. Brakes looked smaller on the W20 but that is by eye so may not be correct. The W20 had SumoSprings installed and the measurements/mounting look like it will fit so I ordered a set and will try them out.

I am quickly finding out that a 19+ Year old MH's sometimes need significant TLC. one of the owners did multiple electrical, wiring electronic and system mods some of which are obvious and others need some Sherlock Holmes investigative mystery solving. Thank god my dad gave me the "you can fix anything" attitude and the mechanical/electrical skills to help back it up. The mechanical systems are humming a nice tune, the power stairs actually work, leveling jack's working and the tube TV's are gone.

I did get a few recommendations and found some good info on suspension so the the new shocks (not school bus ones) are on order, SumoSprings (as mentioned) and ordered a right tie rod end that was badly worn. After those go in I will give it a road test and then on to a few minor interior upgrades. Thanks Again!
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Old 09-03-2018, 05:09 PM   #8
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Hello! I also have a ‘98 Pace Arrow Vision 36Z, built on the P12 chassis. I’d be glad to share any knowledge or experience with you. Email at pbriang@yahoo.com
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