bolt T19 4spd to dana 20 transfer case

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stout scout

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I've got a 78 Scout II,196 4cyl,3speed,with, I think, a d20 t-case. I want to ditch the 3 speed and use a t19 4 speed from '73 1 ton, to get a lower 1st gear. What do I need between the 4 speed and the t-case? Ththe 4 speed is a 2 wheel drive. Any help is appreciated. The tag #'s on the 4 speed are 428115-c91and13-09-006. The tag on the 3 speed is 444573-c91 and1307039. The tag #'s on the t- case are 301060-3 and 457719 c92. Thanks
 
If your current Scout II/196 transfer case is a two speed with the stick on the floor, it's a d20. If it is a single speed (chain drive) with a control cable/knob on the dash, then it's an IH-produced tc-143 (code 13143) which is a "married" setup in a Scout II and uses a one-off "coupler", not a drive gear to make the interface.

A t-19 used in a Scout II with a d20 has an adapter bolted to the rear of the transmission case in order to mate with the d20 input face. It also uses a "bull gear" with a pitch angle that must match the angle of the intermediate gear inside the d20 and it must have the correct spline size/count for the transmission output shaft also.

A t-19 from a fullsize truck has a regular tailhousing on it when used with either a 2x4 or with a 4x4 with divorced transfer case. I'm not certain if the output spline and the "stickout" of the shaft will allow mating to a d20 using the intermediate adapter or not.

It would be far easier to use a Scout II t-19 if your transfer case is a d20, that is a direct bolt-in for the most part if you have the correct pitch bull gear.
 
Ok, it is a d20 t-case. However, I don't have a t-19 4 speed from a Scout. It is a fullsize t-19 from a 1310 1 ton,v8,which is what I would like to utilize since I already have it.
I do have the bull gear from the three speed that was originally in the Scout. I was thinking I could still use that, on the t-19, and find the correct adaptor for a t-19 fullsize to adapt from the 2wd to the d20 , if one can be found. I didn't realize a t-19 from a Scout II and a fullsize t-19 were different beasts. Does this sound feasable? I'm not concerned with any sheetmetal clearances, or driveshaft lengths, the Scout no longer has a body to get in the way, and I can lengthen or shorten drive shafts. It looks like everything would be pushed back at least a couple inches anyway.
 
Waaaay back in the beginning of this forum, I posted this thread regarding doing a swap of a Scout 800 t18/d20 into my Scout 80 fourbanger:

http://www.forums.IHPartsAmerica.com/transmission-tech/911-Scout-80-t18-four-speed-swaperoo.html

Keep in mind, the issue with doing this is the "pancake" bellhousing which is not at all similar to an sv bell/clutch setup. But those pics do show the adapter on the rear of the t-18 (same as a t-19 except for a non-synchro low gear). Notice the "short" output shaft and the spacer/adapter bolted to the rear of the trans.

The bull gear on that one it's been removed in this pic) is a 20* pitch with a 6 spline hub. That bull gear pitch will not match your current intermediate gear in your transfer case. You would need a 6 spline bullgear with a 17.5* pitch, spicer p/n 18-8-55 which was used in some Jeep cj models.

I "think" that your fullsize truck t-19 has a much longer output shaft. So that is a dealbreaker I believe.
 

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I was under the impression that the pancake bellhouse was for the 800's only. The Scout II 3 speeds had the larger bell house and stupid long input shafts, I thought...

Your going to need to find another 4 speed trans from a Scout. You can find close ratio 4 speeds for cheap. You'll have to swap the input and gear cluster from your wide ratio into the 4x4 case, then use the output from your 4x4 case.

Chris pucci has done it and had great success. Search around some, lots of good info on it.
 
You can't easily adapt the truck transmission to Scout style transfer case. So that will be your biggest problem, finding a Scout II style tranmission set up for the married transfer case.

As binderbound said - you can swap the wide ratio gears into a close ratio case. I've done it a couple times and they work great!
 
binderbound said:
I was under the impression that the pancake bellhouse was for the 800's only. The Scout II 3 speeds had the larger bell house and stupid long input shafts, I thought...

Your going to need to find another 4 speed trans from a Scout. You can find close ratio 4 speeds for cheap. You'll have to swap the input and gear cluster from your wide ratio into the 4x4 case, then use the output from your 4x4 case.

Chris pucci has done it and had great success. Search around some, lots of good info on it.
Click to expand...

My comment regarding the "pancake" bell was for clarification only regarding the pictures I posted. No reference was made to having to use that part as a workaround for performing this proposed transplant.

The purpose of the pic was to illustrate the back of the short output trans and how it couples to a d20.
 
So is there a wide ratio 4 spd and a close ratio? And what does the Scout iis come with? I like the 4 to 1 which I think the fullsize tranny I have is.
 
Ok, guys, I just picked up a t-19 & bell housing for my 78 Scout II this weekend. It came from a 72 p/u with a 345. 10 spline input shaft. Am I in the same boat? Going to have to make these mods as well??
 
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