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Old 10-20-2009, 01:04 AM   #1
RckyMntnKng
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Join Date: Apr 2007
Location: Meridian, Idaho
Posts: 316
Transfer Cases for Doubler - 71 GMC Jimmy

Ok this thing needs a doubler, and Ive had a hard time finding a good used deal on a np205 with the 32 spline from a th400. That's what everybody calls for...ORD, NWF etc.

My truck has/had a Th350 with the 27 spline np205 stock, and so the bearing is smaller and to change the input shaft would be a pain or more expensive than waiting to find the right transfer case.

While back I found a Th350 style Np203 and adaptor from a 74 or so blazer, so I think i can mount the range box to my Th350....

Well i found a very cheap 205 from an 86 chevrolet 1-ton that was mated to a TH400. Looks to have the 32 spline long input shaft (would have to be changed for short shaft, but bearing size is correct?), and I guess a slip yoke rear output (Not sure if I keep that part, original 205 didnt have that style). It also has some sort of PTO that ran a 12k generator. All this stuff works flawlessly and the date on the 205 is March 13th 1986. I was told all 86 and newer 205's were a round style instead of racetrack 8 style, but this one appears to have the same 8 bolt pattern to me, unless they are talking about the tranny side of the adaptor

So now I have all kinds of crap, any advice on what I need or don't need to make the doubler?

What is the best and most affordable doubler kit manufacturer?

Anybody know anything about this style or brand of PTO?
Would a PTO winch work well if I wanted to try that route?

Any tips, pointers, or help is appreciated!

First 3 Pics are the 86 np205, 4th pic is the 203 and adaptor, 5th is the stock 205 and 27 spline adaptor
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71 Jimmy: D60/14BFF, 9"F/11"B Lift, 350-350-203-205, Crossover Hydro steering, Beadlocks, Tube stuff and the bottomless cooler
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