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I found a TH400 mated to a 203 while browsing through the JY the other day. It got me to thinking about a 203/205 doubler setup. I tried searching here for various combination of T19, 203, 205 and doubler, but didn't really turn up what I was looking for. What's it going to take to mate a T19 to a 203/205 doubler? Is the Chevy 203 the one to use, or would a 203 from a different application work better?

I'll have to admit, my knowledge of the 203/205 setup is pretty slim. I've seen them around, but never paid much attention to technical ins and outs of what it would take to mate one to T19.
 

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you might be a gearhead if you've ever said...

Mechanos said:
while browsing through the JY the other day.
Chris

P.S. I am very interested in seeing what people come up with here, I would love to run this setup on my scout also.
 

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What spline is the output of a T19?

The Chevy 203s came with inputs to match 10-spline (SM465), 27-spline (TH350), and 32-spline (TH400 and late model SM465). The Ford 203s are all 31-spline. Dodge had 203 mated to 727 (23-spline I think).

If you have the wheelbase, you can find a divorced 203, and make it a 203/205 doubler, so then you can run whatever 2WD trans in front of it you want.
 

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Go auto and forget the stick... Everyone I know that had a stick and went auto says wow:D
 

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harkinoff said:
Go auto and forget the stick... Everyone I know that had a stick and went auto says wow:D
Ed Zachary. Im ready to ditch my stick and do like Sully.

IH 727 with Chrysler tail shaft housing (Waggy) to Jeep 300.
 

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Contact Dean at Performance Cyrogenics. He built a setup just like this(except it was a T98) for a friend of mine. Looked pretty sweet when it was done. Dean should be able to tell you what he did to make it work.
________
new developments in Jomtien
 

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thecarman said:
The Chevy 203s came with inputs to match 10-spline (SM465), 27-spline (TH350), and 32-spline (TH400 and late model SM465). The Ford 203s are all 31-spline. Dodge had 203 mated to 727 (23-spline I think)..
That's some good, accurate tech right there.

The TH400 32 spline 203 is a good score.

10 spline 203s only came in 74 Blazers, pretty rare.
The 32 spline TH400 versions can be found, but are pricey.

32 spline 465s came with 205s, 208s & 241s behind them.
I don't think I've ever seen a stock 465/203 combo that is 32 spline.
You have to re-drill the 203 box to mate to the adapter (standard round).

Last year I picked up a 465 for about $150.
I found input less 203 for free last month & I just bought a 32 spline input from ChiScouter.

I'm either going to go 203 to flipped D300 (I got a HP60) or the new Stak black box to Ford 205.

I like the fact that D300s & the black box have 2.6/2.7:1 versus 1.96:1 (giving more reduction selections).

My IH engine/tranny knowledge is limited, but how hard is it to put a Chebby tranny on an IH powerplant?
 

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Discussion Starter #9
I guess I'm just a little bit backwards than most other sheeple.... I prefer my built auto for my tow rig, but I still prefer the stick in my trail rig. :laughing:

The sad thing is I already have a Scout D300 and sitting in the corner of my basement (still new in their boxes) I have a TeraLow 4:1 kit, AA 32-spline short tail rear output, and a JB Conversions 32-spline front output. With the rash of broken 300 cases I've been reading about lately (and Stak not committing to building a Texas pattern Replace-a-case) I'm seriously considerding selling all that stuff going with a 203/205 doubler.
 

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$500 gets an adapter from Novak to a round patern t'case with 21 or 23 spline output.

Is the 203 a round pattern 'case?
 

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Mechanos said:
I guess I'm just a little bit backwards than most other sheeple.... I prefer my built auto for my tow rig, but I still prefer the stick in my trail rig. :laughing:

The sad thing is I already have a Scout D300 and sitting in the corner of my basement (still new in their boxes) I have a TeraLow 4:1 kit, AA 32-spline short tail rear output, and a JB Conversions 32-spline front output. With the rash of broken 300 cases I've been reading about lately (and Stak not committing to building a Texas pattern Replace-a-case) I'm seriously considerding selling all that stuff going with a 203/205 doubler.
I'd like to talk Duffy into building a 231 Box4Rocks with a race-track NP205 for the rear 'case..

The Novak (and AA) adapters will let us run the 231. Use the 205 behind it to avoid the broken-300-blues. 2.72 and 1.96:1 ranges..
 

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tsm1mt said:
Is the 203 a round pattern 'case?
Nope.

It's a big flat case.

I think 1-2 holes line up... The others have to be drilled & tapped.

Not to badmouth Duffy, but he has been really busy & is hard to get a hold of.

I picked up a 32 spline 241 rangebox because he said he was going to start doing 241s for the Chevy guys... He did one run & said no more.

http://www.pirate4x4.com/forum/showthread.php?t=529871
 

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The easiest way that I could think of when I pondered this setup would be to find a 4wd ford T-19 and snag it.

Then one would simply put the Ford mainshaft in ones own IH T-19 then drill and tap the rear of said IH T-19 to use the adapter from the Ford tranny.

Then use a Ford 203 to whatever 205 you want and bammo.

The only problem is finding a 4wd Ford T-19 most of the ones I've seen have been T-18's but I'm still looking:D
 

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Discussion Starter #15
Thanks Randy... I've already been there and done some reading. If I get a chance tomorrow, I'm going to call ORD and talk to them about it. Put a PM into Dean as Jeff suggested above. Dean said they made a custom adapter for the trans to 203 that was only about 1.25" thick. Then had Sierra Transmission respline the output shaft to 32-spline. This sounds like it would end up being about the shortest overall lenght and would most likely be the direction I would go.

The Novak adapter kit basically uses this same approach. It's a T19 to round pattern adapter and a new mainshaft for the transmission. Since it's intended to mate a T19 to a Jeep 300, the new mainshaft is 23-spline. The Novak adapter is also 3.2" long. I would rather go with the shorter adapter and 32-spline tranny output shaft.
 

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Sounds like, after adapters, transfercases, driveshafts, and crossmember fabrication, you're into Atlas or Klune V territory and some $. You said you were going to strench the wheelbase, what about using a IH 4 speed with a divorced 203 out of a 200 pick-up, and attach the 205 onto that? That combo would be fawking huge! I know where there's a Dodge 727 w/ a 203 attached. (I know, auto ain't man enough for you). :flipoff2: Either way, you'll have a couple of grand worth of DIY parts & labor, just bite the bullet and get the 4 speed Atlas. :smokin:
 

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TheCopperCowboy said:
Sounds like, after adapters, transfercases, driveshafts, and crossmember fabrication, you're into Atlas or Klune V territory and some $. You said you were going to strench the wheelbase, what about using a IH 4 speed with a divorced 203 out of a 200 pick-up, and attach the 205 onto that? That combo would be fawking huge! I know where there's a Dodge 727 w/ a 203 attached. (I know, auto ain't man enough for you). :flipoff2: Either way, you'll have a couple of grand worth of DIY parts & labor, just bite the bullet and get the 4 speed Atlas. :smokin:
Divoced 203 out of a 200 pickup? Is that a Dodge, because IH never used the 203..

The way I figure it, it's ~$1000 plus the junkyard parts to do the T19/231-box/Dana 300 (or, I suppose, a late SAE6 NP205). (231 - $80-ish, 300 ~$150)

$500 to adapt to an Atlas, plus you need the Atlas of course.

The 203/205 is around $1000 (~$800 for the doubler, $200-ish for the new input for the second 205, unless you find the TH400 205) PLUS adapting to the trans (though from reading, maybe we could get away with robbing parts from a Ford T-19 and use a Dodge '203 IIRC).

Mr Scout's box is.. $1800? Last time I checked..
 

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Discussion Starter #18
It's just a bunch of thinking out loud right now. That puny little D300 case does worry me though. I'd just hate to setup the front axle (pinion angle) for the D300 only to break it and have to go to another route that would require a change in the front pinion angle.
 

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tsm1mt said:
Divoced 203 out of a 200 pickup? Is that a Dodge, because IH never used the 203..

The way I figure it, it's ~$1000 plus the junkyard parts to do the T19/231-box/Dana 300 (or, I suppose, a late SAE6 NP205). (231 - $80-ish, 300 ~$150)

$500 to adapt to an Atlas, plus you need the Atlas of course.

The 203/205 is around $1000 (~$800 for the doubler, $200-ish for the new input for the second 205, unless you find the TH400 205) PLUS adapting to the trans (though from reading, maybe we could get away with robbing parts from a Ford T-19 and use a Dodge '203 IIRC).

Mr Scout's box is.. $1800? Last time I checked..
You forgot the Klune. I had the set up priced out about a year and a half ago. It was about $1300 thru a PBB vendor.

Dont forget the $400+ for new driveshafts :rolleyes:
 

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Gen. Nonsense said:
You forgot the Klune. I had the set up priced out about a year and a half ago. It was about $1300 thru a PBB vendor.

Dont forget the $400+ for new driveshafts :rolleyes:
That just ups the cost more.. but I had been pondering it for a bit, too - with the big advantage over a 231 setup that Klune will set it up for a NP205 behind it.

The downside to the 231/300 combo is IF you break the 300 case, what do you do? I haven't seen the just-case cost for the STaK 300 case yet, but that's one option.. the other is... put an Atlas behind the 231. $$$.

As for the driveshafts.. those are a given, since Mechanos is changing axles and everything else anyhow (and I'm still napkin-sketching the same)
 
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