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Old 07-20-2011, 07:15 PM   #1
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Default Cab and Sleeper on Air Ride

I was on the Interstate last night next to a Peterbilt 379 with a large sleeper pulling a car hauler. I noticed that the cab and sleeper appeared to be solidly tied together and they floated/bounced above the truck frame; presumably on air bags. The movement seemed significant.

With that much movement, how do you attach a MH box solidly to the frame of the truck and to the cab or sleeper? I would think there were be significant movement.

Thanks!
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#90 Heilig-Meyers Ford NASCAR Winston Cup car, Ronnie Hopkins chassis, Joe Rhyne motor, Jericho trans, Ford 9". 99 Suburban 1500 & 24' trailer, 08 Chevy HHR, & 04 Saturn Ion. Looking for 379 or 389 Peterbilt conversion, 24' to 30' box, bumper pull.
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Old 07-21-2011, 07:24 AM   #2
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you can get a longer rubber boot. think it went from 4 gap to 8 inch travel. they said on the longer ones you may get some noise from rubber flapping. they might make one 10 or 11 inch also. most guys take out air bags. will put in thick rubber spacers or block solid. i am thinking i will leave my air bags in.
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Old 07-21-2011, 08:42 AM   #3
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Uni-Grip makes all kind of accordian seals. They are very helpful. I bought my boot and door seals from them.
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Old 07-21-2011, 03:22 PM   #4
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my truck is a air ride cab sleeper and the box is air ride to and they are tied to geather works great
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Old 07-21-2011, 07:33 PM   #5
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So ... I presume that leaving the cab and sleeper on bags and putting the box on bags provides a pretty good ride. How much better ride? Material? Thanks!
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#90 Heilig-Meyers Ford NASCAR Winston Cup car, Ronnie Hopkins chassis, Joe Rhyne motor, Jericho trans, Ford 9". 99 Suburban 1500 & 24' trailer, 08 Chevy HHR, & 04 Saturn Ion. Looking for 379 or 389 Peterbilt conversion, 24' to 30' box, bumper pull.
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Old 07-21-2011, 09:13 PM   #6
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how many bags and what size? what spacing are they? did you fabricate your own brackets?
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Old 07-22-2011, 02:52 PM   #7
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yes we built it 4 bags 4 shocks works verry well i had a 40 foot bus when we raced jr dragsters and i did not want to give up that ride so when we went to a big car A fuel car we had to build what we have now works well
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Old 07-30-2011, 03:07 PM   #8
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I am converting a 379 Pete w/63" bunk to a MH using a 16' Morgan box. I will be removing the air ride system and mounting the rear of the sleeper using solid mounts. That will eliminate the movement between the tractor/bunk and the box. I will use a stock Peterbilt sleeper ring and rubber between the back end of the bunk and the front end of the box.

Many class 8 trucks do not have air ride. Further , some Kenworths have air-ride on the tractor and not on the sleeper. I figure the easiest was to eliminate any movement problems is to eliminate the movement.

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Old 07-31-2011, 11:53 AM   #9
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Default air bags

sure makes the rid a lot better with air bags
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Old 08-05-2011, 09:25 AM   #10
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Default Air Ride

Yes, you are correct; I do expect some degrading of the softness of the ride when I remove the airbags from the back of the new sleeper to make it one ridig unit.

However, I still have the air ride seats, and they take up most of "bumps" when going down the road, anyhow.

Hey, this is a big rig converted to a motorhome, but still looking like a truck. The sacrifice is more than worth it for me.

Thanks, for all the comments. This site is great! And, so far, no jerks (not the air bag kind!).

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Grand Rapids, MI
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