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Old 11-25-2017, 09:43 PM   #1
michael.kitko

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Fummins Highboy Stub Shaft and a Random Off Topic Question...

So, I am almost done with my transmission rebuild in my project. I still have a separator plate that needs to be ordered, but anyways, I am running into my next hurdle.

So, as you know I am shoving a Cummins into a 77 F-250. This is one of the High-Boys, so it has a divorced transfer case in it. I have always intended on keeping the divorced transfer case, but somehow now it has turned into a doubler, or will be soon. As you can guess, they are about 8 inches longer when the 203 and 205 are married to each other, than just a 203. The transmission and engine are already pushing my drivetrain back, in the form of a shortened stub shaft, or so I thought. So my question, the back of the 47RH has a slip yoke 1410. Do you guys think that being used as the slip joint will have enough play that I can delete the slip joint from the stub shaft and move the drivetrain forward a bit?

One other question, this one is way off topic from the above and more long term. I have the pieces left over from a 203, specifically the chain case section and differential. I was wondering if any of you have seen that case turned a little on it's end, adapter plates made, some shafting machined, to make it into a front tandem axle drive box? I know that is similar to what they did on the T-Rex, but I was hoping someone had some more info than just me winging it or better ideas than that.

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Old 11-28-2017, 11:54 AM   #2
joefarmer
 
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For your first question, I don't have experience with slip joint needed on the transfer case input. Is the 47RH a 2wd version with the 5-6" long slip yoke output?
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Old 11-28-2017, 12:40 PM   #3
Highwayman
 
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My own off topic question:
Where do you plan on driving the speedo from?
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Old 11-28-2017, 02:28 PM   #4
Tobin
 
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I am also doing a highboy swap and after pushing the engine back, I just abandoned the idea of the divorced transfer case and run a married setup. The 241 is stronger than the 205 anyways.
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Old 11-28-2017, 02:40 PM   #5
jasonc

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The divorce 205 does come in handy to clock it and lower the frt driveshaft angle. Could lower the rear shaft angle also if you wanted to.
 
Old 11-29-2017, 01:11 PM   #6
Tobin
 
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The divorce 205 does come in handy to clock it and lower the frt driveshaft angle. Could lower the rear shaft angle also if you wanted to.
You can clock a married but really don't need to. The rear driveshaft angle is gonna be the killer. How would you lower the rear angle with the divorced?
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Old 11-29-2017, 03:23 PM   #7
jasonc

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I built a mud bog truck and mounted the floater 205 dead center, same shaft for the front and rear. I lowered the t case in relation to the trans and had a slight angle in the stub shaft. It lowered the rear shaft angle by about 4", worked perfect and never a u joint problem, had a stout 509ci big block.
 
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