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Old 11-24-2003, 06:49 PM   #1
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1979 24' Airstream Excella 24
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What's the Deal with 2-Speed Rear Ends?

I am thinking it would be cool to have a 2 speed overdrive rear end installed. Seems like it would lower RPMs and increase gas mileage. I have a 24 footer and I think I would have the power available to support the gear ratio.

Anybody smart on this topic?

Joe
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Old 11-24-2003, 06:53 PM   #2
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what about the Gear Vendors over and under drive? Sounds like it would accomplish what you are wanting, many Mh's use it.
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Old 11-24-2003, 06:55 PM   #3
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Thanks, do you know where can I see info on it?
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Old 11-24-2003, 07:00 PM   #4
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Found the Website

OK I found the Gear Vendor's website. The gizmo looks like it is a transmission replacement with overdrive. Looks EXPENSIVE. I was envisioning a differential replacement. But what do I know....
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Old 11-24-2003, 08:00 PM   #5
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Re: Found the Website

Quote:
Originally posted by josephhh
OK I found the Gear Vendor's website. The gizmo looks like it is a transmission replacement with overdrive. Looks EXPENSIVE. I was envisioning a differential replacement. But what do I know....
It IS expensive. I put one on a tour bus a few months ago. It helped fuel consumption, and engine wear, but cost almost $1800.00, but a two-speed rear end is much more. Even a used rear end is a ton of money, and then you have to pay to make it fit.
What transmission do you have in your rig now? And what ratio rear end do you have now? And, what engine? You may just be able to change gears in your current axle, without having to resort to major, expensive surgery.
Terry
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Old 11-24-2003, 08:04 PM   #6
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Good info.
I'll check on the data and get back to you...
Looking in the manual now....
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Old 11-24-2003, 08:44 PM   #7
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1979 24' Airstream Excella 24
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I reckon I will have to climb under there and look!
Can't see from the service manual. It says hydromatic 400 and a 101/2" rear end gear. 454 engine. All stock (I think). Only 42K miles on the rig. I'm out of town early in the AM till after Turkey day. I'll look up under it when I return.
Thanks for the help.

joe
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