More Scout info from the Binder.com site
The info about parts at the bottom is several years old, good luck
Scout transmission info
Believe it or not, the last time this came up I actually wrote it all down and saved it so here it is. At that time, I had illusions of writing a book on this type of thing, but that's obviously not going to happen...
However, don't pirate my findings below for profit - everyone is, however, welcome to save them for yours and your friends 4-wheeling pleasure though... - Chuck :-)
#1) T-19's from IH's are the ticket. There are 2wd and 4wd and 4.0 and 6.32 gearsets.
#2) The 2wd's are almost always 6.32 gearsets.
#3) The 4wd Scout-2 T-19's are usually 4.0 gearsets. The exception to this is some 4cyl Scout 2’s - especially the ones with the single speed transfer case.
#4) Scout T-19's have an adapter plate and output shaft to mate up to a large-hole Dana 20 - even when they are mounted up to the single-speed chain-drive transfer case.
#5) All IH T-19's DO NOT have the trans mount built into the 1" thick cast-iron adapter plate like the T-18's do. The adapter plate DOES NOT go down below the trans housing with a provision for the trans mount - the provision for the trans mount is cast right into the T-19 case. This means a couple of things - A) You CAN put an IH T-18 adapter plate onto an IH T-19 - they have the same bolt pattern, and you will end up with 2 places to bolt the trans mount. B) You CANNOT put an IH T-19 adapter plate onto ANY T-18 housing because now even though you'll get the trans and Dana 20 transfer mated up fine, there will be NO provision for the trans mount. C) If you go with an IH T-19 in a CJ, you have to re-drill the cross-member/skidplate-to-frame holes because it will sit forward about 1.5" from the stock T-18 holes because of the trans-mount provision being on the trans case on a T-19...
#6) To mate an IH T-19 case up to a Jeep T-150 bellhousing, you have to re-drill for the 4 large studs in the front of the trans case, and bolt it up to the bell-housing and then bolt it into the Jeep as a married unit. Once you have the correct collar for the front of the trans, it can be used to index the trans with the bellhousing to get these holes right.
#7) A Ford T-18 6.32 13-tooth input shaft is Identical to a Jeep T-18 6.32 13-tooth input shaft EXCEPT for the pilot bushing snout being too short. This is made up for by using the special Advance Adapters pilot busing that rides in the area where the automatic torque converter snout would ride in the AMC crank. Now, the Ford T-18 6.32 13-tooth input shaft has the same gear on it as the input shaft for the IH 6.32 T-19, or ALL 6.32 T-19’s for that matter. So, one of these should be used to set up the IH 6.32 trans (18 or 19) for Jeep use.
#8) You’ll also need a Ford front collar, which is identical to Jeep, and this crosses all gear ratios and T-18’s and 19’s. IH has a real big thing, but it can easily be replaced with the Ford unit because the 4 bolt holes that hold the collar on are exactly the same.
#9) Jeep and IH 4wd T-18’s have the same mainshaft or output shaft. T-18’s and T-19’s have DIFFERENT mainshafts even though they are very close – the snap-ring grooves are in different places and not in very good places to be converted over on a lathe…
#10) You CANNOT bolt a Jeep Dana 20 up to an IH T-19 even though the adapter plate and output shaft are right because the Jeep Dana 20 shifter has a MAJOR clearance problem with the IH T-19 case. This is no biggie – use an IH Dana 20 instead as they are the same in every way except the shifter and an IH’s D20 shifter is a better design and lends itself easily to a twin-stick conversion.
All of this makes the whole thing sound like a royal pain until you sum it all up into the “Swap Options” below:
Swap Option #1) You have found a Scout with a 6.32 T-19 and a Dana 20. Great! - you can yank the whole mess out, swap out the input shaft and collar with the Ford 13-tooth input shaft and collar, and bolt the whole nine yards up behind an AMC engine by re-drilling the bell-housing.
Swap Option #2) You have found a single-speed xfer case Scout-2 with a 6.32 gearset. This trans is ready to accept an IH Dana 20 but NOT a Jeep Dana 20 (see #10 above) by removing the transfer case and also the coupler on the output shaft of the trans and replacing it with the standard Dana 20 26-tooth bull or input gear. Swap out the input shaft and collar with the Ford 13-tooth input shaft and collar, bolt up an IH Dana 20, and bolt the whole nine yards up behind an AMC engine by re-drilling the bell-housing.
Swap Option #3) You have found a Scout with a 4.0 T-19 and a Dana 20. This is the most common Scout II out there – it should be easy to find one of these. First of all, you can forget about swapping out just the input shaft and collar with a Ford 4.0 input shaft and collar because I don’t think there ever was such a thing and even if there was, that input shaft with the proper gear is impossible to get. So, this is where it starts to get interesting. What you are going to need to do here is also get a 6.32 2wd IH T-19 and use the gearset from it, a Ford 13-tooth input shaft and collar, and the, mainshaft (output shaft) and adapter plate from the 4.0 trans Scout 2 trans you started with. Both transmission cases will be the same.
Swap Option #4) You want to use a Dana 18 transfer case with your IH T-19. Easy – just assemble the Jeep Dana 18 guts into a large-hole IH or Jeep Dana 20 case. The Jeep Dana 18 shifter housing will have to be ground doen about Ľ” on the inside to clear the IH T-19 case. That’s it!
I figured all of this out by trial and error and there may be even more options that you can figure out too by rummaging around. Just because you haven’t heard of it before does not mean it will not work. In my fried Greg’s Jeep, we used a combination of option #3 above, and put a Dana 18 twin-stick transfer case behind it – all in a ’79 CJ-7 with an offset Dana 20 rear! The options are endless…
So go for it and have a good time – I’ve done 4 T-18/19 tranny swaps in CJ’s and they were all different and all presented their own challenges. It’s A LOT of hard work, but well worth the effort on the trail! Remember, the project itself and especially the hunting in the junkyards is half the fun! :-)
P.S. (I can't believe I'm giving all these secrets away but I'm gradually exiting the "hard-core" Jeep stage as everyone got married and is now having kids...) Anyway, any gears, input shafts, or collars that you need, call Border Parts in California - they have everything for a very reasonable price - they have the Ford Collars and 13-tooth Ford input shafts - brand new and CHEAP!
"The Heep" 73 Commando, 258 I-6, T-18, Scout Dana 300 w/Tera 4:1 Kit, SOA, PS, Thru-dash Cage, Alcans, OBA, ARB's, HEI, Ft disc, MC 2100,Dents, Mud & Rust.