T86 To T14 Swap

68 cj5, dauntless engine.

Want to put a used t14 behind the dauntless in place of the t86. It was mated up to the dauntless so the front end should be straight forward.

Mounting the dana 18 to the back of the new to me T14 is where I need help. The gear that came with the t14 is stamped 18-8-50 Dana. It has 29 teeth.
How do I determine if it will work on the dana 18 that the old t86 was attached to?New output gear that goes inside the tcase:

 

Current output gear in the t86/dana 18 is stamped 18-8-19 and has 26 gears

 

https://www.novak-adapt.com/knowledge/gear-table/

 

It seems like an older transfercase or guts have been swapped in at some point. Novak doesn't even list a 10 spline gear that's compatible with the other gears in the transfercase. Finding another complete large hole transfercase or swapping out all the gears may be required.

 

Thank you. I don't know how to read that chart to find what I need, only what I have

 

I can let you know anything, just tell me what you need/pics i should upload

 

All the gears in each row are compatible with each other. if you have a gears, the others need to come from the same row. Depending on the year of the transfer case there are different tooth counts and pressure angles.

There are four gears in total that need to work with each other. The input gear, the intermediate gear, the output gear, and the low range gear that slides on the output gear.

 

I wouldn't think Terra-low gears have Dana stampings on them that match an OEM gear. The Terra Lows have a different pressure angle and don't match up with any gears on that chart.

As I recall, a small hole case can be put on a T-86 using a small hole T-90 output bearing retainer. More disassembly will be required to figure it all out. Things have definitely been swapped through the years.

 

Eating at a neat place in Elkhart, Indiana: 56 bucks.
Gas to get there and back: 120 bucks.

Driving 9 hours round trip in pouring rain with 60mph wind advisory in place, to buy a used transmission that doest just bolt right up to the transfer case: priceless

 

My best guess is Jeepstar has a T86 case with T90 guts. This would have a 6 spline output which would accept that 26 tooth Dana drive gear. That means the D18 is probably a small hole with a 1-1/8” intermediate shaft that has the caged intermediate roller bearings. Put the whole thing back together using T90 guts?
As far as I know, there are two Jeep T14’s; those used in the last early CJ5s (up to ‘71), and the AMC T14 used behind the straight six 232/258. I know they are not interchangable, but have never compared what the differences are. I know the early CJ versions have a 10 spline output shaft that takes the gear pictured in post #1. This requires a large hole D18 where the 29 tooth gear mates correctly to the intermediate gear. This same “late” case can also be used with a 6 spline input gear if your transmission has that output shaft, like the T90 has.
-Donny
Edit: I looked at an earlier post and Jeepstar’s transmission is a gear-stripped T86, of course with a 6 spline output. It appears an earlier owner replaced the transfer case with an early small hole 26 tooth version.




26 tooth version

 

That sums up this hobby pretty well right there.

It's a good way if having some adventure in your life.

 

Take your d 18 apart and see what gears you have, then buy what makes it work. The chart tells you what works together. You need to replace intermediate gear bearings and shaft on any unknown d18. It’s all pretty easy. Lots of write-ups here

 

The large hole version allows you to remove the transfer case with the drive gear still attached to the transmission output shaft. Just because you can remove the T/C without pulling the gear, if you do this, you must be very careful you don’t pull the transmission mainshaft back which then releases all the roller bearings at the main drive gear into the bottom of the case.
The 26 or 29 tooth transfer case drive gear is larger than the small hole in those transfer cases, requiring the gear be removed before separating case from the transmission.
-Donny

 

4" hole on the front side. Is that chunk of metal supposed to be missing?