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Old 04-12-2011, 11:34 AM   #1
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Airbags on a tag axle?

I have a P-32 chassis with a tag axle. The front has air bags and I put Koni FSD shocks on the front. What a difference in ride. Now I'm thinking about putting the FSD's on the rear and a set of airbags. I called 2 truck shops and asked about the airbags and got 2 different answers. One shop said I need to put airbags on both the main and tag axle (4 bags) the other said I couldn't do it because it would "unbalance" the rear end......

Has anyone else put air bags on a P-32 in the rear? And if so did you have to put on 4 of them? Did it help the ride?

Thanks in advance.
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Old 04-15-2011, 10:42 AM   #2
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Billieg. As a service mgr., Let me tell you what i know, Not what i guess. First. all tag axels (on gas chassis) are added by the motorhome builder. Not by the chassis builder. Second. all tag axels are much weaker than the rear axel. They normally only carry about 1500 lbs or so. If you overload the tag, the bearings will fail.(personal experience) If you add a tag airbag and over inflate it, It will for sure overload the tag axel. The problem will be, how much air to add to the bags. I would only add airbags after I called the motorhome Manuf. and spoke to the ENGINEER who designed the tag.
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Old 04-15-2011, 10:51 AM   #3
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Quote:
Originally Posted by ga traveler View Post
Billieg. As a service mgr., Let me tell you what i know, Not what i guess. First. all tag axels (on gas chassis) are added by the motorhome builder. Not by the chassis builder. Second. all tag axels are much weaker than the rear axel. They normally only carry about 1500 lbs or so. If you overload the tag, the bearings will fail.(personal experience) If you add a tag airbag and over inflate it, It will for sure overload the tag axel. The problem will be, how much air to add to the bags. I would only add airbags after I called the motorhome Manuf. and spoke to the ENGINEER who designed the tag.
Thanks for the reply. Since it's a 1990 Holiday Rambler I don't think I can call and get any info. What you said makes sense. How about just putting the airbags on the drive axle?
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Old 04-15-2011, 03:10 PM   #4
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AS i said , I like to say what i know, not what i think. The only problem is, you could off load the tag and overload the main axel. If you could talk to a engineer who can work out the loads, I think you might be O.K. I have a 99 F-53 ford chassis. I installed air bags on the front and love them. But I would be hesitant to add them to a tag.
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Old 04-15-2011, 04:28 PM   #5
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Originally Posted by ga traveler View Post
AS i said , I like to say what i know, not what i think. The only problem is, you could off load the tag and overload the main axel. If you could talk to a engineer who can work out the loads, I think you might be O.K. I have a 99 F-53 ford chassis. I installed air bags on the front and love them. But I would be hesitant to add them to a tag.
Again, thanks for the advice. The front seems real solid and doesn't sway or move around too much while the back seems to act like a boat. I thought the airbags would make a difference. I put Koni FSD shocks on the front and next week will have them put on the back. I'm also going to have the stabilizer bar bushings replaced. Maybe that will be enough.
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