Transfer case Swaps.

Brahmco

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Jul 7, 2020
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Brahm
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Wrubleski
My 1979 has the np 203 all wheel drive case installed with a part time conversion. I purchased an NP 208 to swap into my Bronco. I did a mock up and found that the 208 Front output shaft location will cause me to have to redesign the factory transmission cross member with a big notch in it so the drive shaft does not hit it.
I know The 205 is what everyone wants to put in but I’m not building a rock crawler and wouldn’t mind loosing 150 lbs by going to an aluminum cased design. Also the 205 gearing is not even 2:1 factory in low range. Has anyone tried a later model transfer case swap? Or even an atlas swap?
 

gibsBRonCO

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I have the same setup in mine - 203 converted to part time. I'm planning on converting mine back to full time. What is your issue with the way it is now? Weight? Seems like a lot of work to save a few pounds.
 

Brahmco

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Jul 7, 2020
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Brahm
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Well the weight loss is just a plus. I really looking for a better low range ratio. Much better engine braking when on the trail. I do plan on going to 4.56 gears and that should help some but 2.0 to 1 is still not a great low range.

On the point of keeping your 203, make sure you get the upgraded spider gear differential cage. My Bronco had that cheap stamped steel carrier cage and it was cracked in two places. I found a two piece cast Iron cage out of a wrecked Ram charger that had a 440 engine option. It seems other brands with the bigger engines got the stronger cage.
 

Brahmco

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Jul 7, 2020
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Vancouver, BC, Canada
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Brahm
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Well for direct swap it would be a 205. For aftermarket I would think Atlas but I have yet to read of one in a generation 2 Bronco. Problem is that if you had the full time 203 it really tight to put a 205 on because the transfer case adapter is so short. But if you had the 205 case and adapter it’s much longer and you cannot swap to a 203 easily either. From what I have read the C6 output shafts are different lengths to accomplish this. Not like the 3rd, 4th, and 5th Gen Bronco that have wider frame spacing and you had some great aluminum cases made which swap across all of those generations.
 
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