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Old 08-20-2022, 06:23 PM   #1
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4WD Class A Conversion?

Has anyone else done a 4 wheel drive conversion to a class A Winnebago ?
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Old 08-20-2022, 10:52 PM   #2
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Mine's 4-wheel drive; pretty sure all of them are...

Now 6-wheel drive that's another story .

Pretty good ground clearance -now to just work on the break-over angles a bit.
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Old 08-20-2022, 11:56 PM   #3
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To get technical, the basic F53 chassis is two wheel drive; i.e. just one set of the two dualies will spin in the slippery stuff. Before I would consider the cost and complexity of adding front drive, I would first get a Detroit Locker rear differential and make sure both sets of dualies keep paddling; no matter what.
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Old 08-21-2022, 07:00 AM   #4
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I was hoping to hear if anyone added front drive to a F53 chassis, and how that went.
Ours is a Workhorse with components from a GMC 5500.
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Old 08-25-2022, 07:23 PM   #5
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You are talking the swap from the ibeam front end to a differential, fitting a transmission/transfer case on the back of the V-10, shorter drive shaft for the rear wheels and installation of a drive shaft to the front wheels. Lot of work, might want to try this on an older coach first. Some of the driveline components from a truck or Excursion might work.
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Old 08-25-2022, 08:24 PM   #6
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Here is a Class C conversion:
https://www.winnieowners.com/forums/...ns-363091.html
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Old 08-28-2022, 04:42 PM   #7
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Well Sir,
No, I haven't done it but, I helped build a Class A several years ago that was 4WD. The person who owned and built it had plenty of experience with this sort of thing. It's not rocket science. It's purely logic and understanding the mechanics of what needs to be done. The V-10 and subsequent trannies that have been coupled to it over the years have many types of transfer cases attached. Just look at any 4WD Ford F-250 through F-450.

Oh and by the way, unless you want some SERIOUSLY odd driving characteristics, do not, REPEAT, DO NOT add a Detroit locker to that system when you're done. There is a specific learning curve to driving a vehicle equipped with a Detroit locker so it acts like normal. But that's way down the road for you so, for now, just look at what needs to be done. Your transmission would most likely support a transfer case. All you need is to remove the tail cone and find out which T/C will bolt right up. From there, you'll need two new drive shafts.

As for the front end, well, yep it will be a bit of work but, a leaf sprung front axle would be quite easy to setup. You've got a couple of square acres to work in under there. The suspension is already there so, you just need to adapt a front differential. The steering system won't be all that hard either. Brakes, well that's a no-brainer. Just make sure your proportioning valve is working correctly.

By the way, if it were me doing it, with your style coach, I'd look for an electronically shifted transfer case. That way you'll only have a knob on the dash to shift to 4WD and not have some sort of gawdy lever sticking up through the floor to shift it. Anyway, have a ball. This would be a fun project.
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Old 08-28-2022, 06:22 PM   #8
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I have installed two Detroit Lockers.
The first was in my 1988 F-350 Crew Cab. The F-350 has a larger rear differential, and it works wonderfully, with only a few degrees of backlash. My truck does indeed "drive like normal," but if you change throttle settings in the middle of a corner (from accelerate to decelerate,) you can get a clunk, but nothing too bad.
The second Detroit Locker I installed was in my 2008 Mustang GT. With the small 8.8" differential, it was a horrible mistake. I had about 30 of backlash, and it made the car miserable to drive. I removed it and replace it with a Detroit True-track. Jeeps with smaller differentials suffer in the same way.
I recommend the Detroit Locker for the large diameter differentials such as is found in a motorhome where the backlash is very low.
Another way to think of this is the small 9" differentials need to have large-enough teeth so that they do not break, but that necessitates large 30 backlashes.
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Old 09-05-2022, 03:20 PM   #9
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Quote:
Originally Posted by Arloph View Post
Has anyone else done a 4 wheel drive conversion to a class A Winnebago ?
Unless you can do this yourself or have a good friend that can, prepare to spend $20-25k and probably more. There are a lot of labor hours, and $100+ it adds up very quickly. Getting parts from the junk yard helps.
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