Hypothetically speaking,

say I wanted to run a D18 behind a TF727, which is behind an AMC 4.0L.
afaik, the AMC engine/"texas" tcase setup was never offered in a Jeep (I think the Scouts had 'em back in the 60's)
I can get an IH 727 for pennies, and ditto on the Waggy 727.

so what would be involved in taking an IH 727 and putting the "texas" adapter on the tail end of a Waggy 727?

Originally posted by Sundowner
Hypothetically speaking,

say I wanted to run a D18 behind a TF727, which is behind an AMC 4.0L.
afaik, the AMC engine/"texas" tcase setup was never offered in a Jeep (I think the Scouts had 'em back in the 60's)
I can get an IH 727 for pennies, and ditto on the Waggy 727.

so what would be involved in taking an IH 727 and putting the "texas" adapter on the tail end of a Waggy 727?

Not going to happen. The IH tailhousing uses a 23 spline output, your only going to find the bull gears for the D18 in 6 spline.

Joe

have you considered the amc/th400/d20 setup that came in earlier fsj's?

I have considered the TH400, but the parastic losses on the that monster are about 40hp.
I was hoping to sneak away with something a bit more efficient.

the bull-gear issue seems to quash the debate, though.
any way around that?

I have a IH texas 727 rear and will trade you for the jeep round rear. We will need to swap main shafts as well.

Originally posted by Sundowner


the bull-gear issue seems to quash the debate, though.
any way around that?

You could broach out the bullgear

I don't have the tranny yet, I'm still in the research phase. you'll be the first I call when I do get one.
who can broach gears? Moser?

Any good machine shop can broach a bull gear.

Originally posted by Old Scout
Any good machine shop can broach a bull gear.

Actaully this isn't quite true. You will have to find a VERY good machine shop that would have a broach to do what you want. Most people do not understand what a broach is, and that they can only cut one spline count in one diameter, and can be limited in the length of the splines that they can make.

You will ahve to find a very good machine shop, that has the exact broach that you need. Those can be hard to come by.


Sean

Originally posted by Station


Actaully this isn't quite true. You will have to find a VERY good machine shop that would have a broach to do what you want. Most people do not understand what a broach is, and that they can only cut one spline count in one diameter, and can be limited in the length of the splines that they can make.

You will ahve to find a very good machine shop, that has the exact broach that you need. Those can be hard to come by.


Sean

We don't have Bubba's and Brother weld/drill and broach like you in the south. Here is Bubba now! :flipoff2:

I may be wrong but weren,t early Scouts available with the D18?? if so you could get one of those from an automatic which would have the 23 spline..
Another possibility is to get AA kit #50-8602 which mates the D18 to 80 and newer autos which were chrysler trannies or depending on what you are putting it into AA also sells a kit to Divorce the D18 they also sell Drive gears with 6,10 15, and 23 spline counts..

even invoking the name Advanced Adapters makes by bank acount shrink by $2. My ultimate goal is to find a way around adapters. I have a good twin stick d18, I'd like to use an auto with it behind an extra 4.0L I have. If A-A has the bull gear, I may have to suck it up and doll out the cash..

Originally posted by hy_desert_4wheeler
I may be wrong but weren,t early Scouts available with the D18?? if so you could get one of those from an automatic which would have the 23 spline..
Another possibility is to get AA kit #50-8602 which mates the D18 to 80 and newer autos which were chrysler trannies or depending on what you are putting it into AA also sells a kit to Divorce the D18 they also sell Drive gears with 6,10 15, and 23 spline counts..

IIRC early scouts that came with a d18 would of had a Borg Warner cast iron POS auto. The 727 started mid year 72 and they used a D-20 then

Originally posted by Old Scout
I have a IH texas 727 rear and will trade you for the jeep round rear. We will need to swap main shafts as well.

I gave one of those to a buddy..supposedly a fresh rebuild. I think it is still sitting in his shed.

Was there an automatic avaliable behind the AMC inline 6 that IH used for a while?

You can use D20 gers in a D18. Get yourself a 727 and D20 from a scout. Swap the D18 shafts and output housings and you should be good to go. You'll be stuck with the D20 low range ratio, but it would work.

Originally posted by Old scout

You could broach out the bullgear

The 23 spline shaft is smaller than the 6 spline shaft, so you couldn't broach it out.

what about the bronco bull gears?
they were 2.46(?)
what was the spline count?

Originally posted by Sundowner
what about the bronco bull gears?
they were 2.46(?)
what was the spline count?

They're 6 spline too.

Originally posted by Old Scout


IIRC early scouts that came with a d18 would of had a Borg Warner cast iron POS auto. The 727 started mid year 72 and they used a D-20 then

Didnt all Scout auto's have 23 spline output shafts?? Also didnt the D20 and D18 share the same mounting pattern?? If the Scout autos all have 23 spline shafts and D18 and 20's share the same pattern why not combine the parts??

from what I've found, there are no less than 11 different input gears for the D18/D20. they vary in tooth count, internal drive splines, ane even gear tooth pitch angle.

Originally posted by Sundowner
from what I've found, there are no less than 11 different input gears for the D18/D20. they vary in tooth count, internal drive splines, ane even gear tooth pitch angle.

That's right, and the automatic Scout one doesn't work with any D18 gearsets.Here's the chart from Novak (http://www.novak-adapt.com/knowledge/transfer_case_gears_grid.htm) But, like I said earlier, you could swap the Scout D20 gearset into a D18. you'd get the crappy D20 low range ratio though.

Did you find the bull gear mentioned above from AA?

I'm REALLY trying to avoid going the crappy D20 gears.
I suppose I could call Mr. O'Brien for something creative.
I haven't found the A-A bull gears, but I need to follow that up.
the A-A website isn't as near as useful as the Novak site.
any idea on the cost of the gears?

Originally posted by Sundowner
I'm REALLY trying to avoid going the crappy D20 gears.
I suppose I could call Mr. O'Brien for something creative.
I haven't found the A-A bull gears, but I need to follow that up.
the A-A website isn't as near as useful as the Novak site.
any idea on the cost of the gears?

Jack can set you up, figure about $1,500 for the gears:eek:

How about, a 203/205 doubler and run the 205 with offset rear output Jesse at High Angle posted awhile back?

How about, a 203/205 doubler and run the 205 with offset rear output Jesse at High Angle posted awhile back?

going in a Jeep. no room for the doubler :(