Odd T14 And Dana 18 Pairing

I'm trying to help a friend with some parts for a Jeep he's working on. He has a T14 that was somehow paired with what I think is a WWII era Dana 18 with a 3/4" intermediate shaft. I haven't seen the parts in person and he has both disassembled.

Here is a photo of the back of the T14. Am I correct that this should have a bearing adapter with it that has an outside diameter of 4 inches to fit into a 4 Inch locating bore on a D18? Did anyone make a bearing retainer to adapt a T14 to a small hole D18?


Here is a photo of the transfer case. The machining of the locating bore is more elaborate than the sample 1-1/4 intermediate shaft small bore case I have. His ruler shows 3-5/8 instead of 3-5/16 but it looks like there's a step inside.


Here's a shot showing what I think is the hole for a 3/4 shaft and a GPW part number

What I'm trying to figure out is if there's a way these two could have been properly together. Also how there would be a bull gear for the T14 that would be compatible with the 3/4" intermediate shaft gear set. Any thoughts are appreciated. His goal is a new transfer case that would work, apparently the gear set was trash. I have a spare large hole D18 but I don't know if he might actually need a small hole model.

 

The short answer here is SELL the GPW D18!!!! That D18 has the standard early small bore index and I'm pretty sure the standard early 6 spline main gear, albeit 27 tooth. It isn't something I want in a modern Jeep with it's 2:1 low range and is actually worth some good money to the restoration crowd. Sell it and pick up a large index case, or put together a large index version with a D20 side fill case. Money ahead, way stronger, and way better low range.

 

Yes, I'm sure the WWII has value to the right person and I know it's not desirable. What I'm trying to figure out is how the T14 could have been mated to that small index case. Also wouldn't the T14 have required a 10 spline input, where could that have been obtained in 27 tooth. Unless somehow you can put a later gear set in a 3/4 case?

 

You are correct in that the T14 should have a bearing retainer that mates to the 4" index bore of the later Dana 18 and the Dana 20 transfer cases.

 

Thanks for the picture. I took a look at the parts today. It was an, um, interesting bit of engineering someone did. They mated the T14 to the 3/4" Dana 18 by omitting the output bearing retainer and forcing the bearing into the recess in the transfer case. The need for a 10 spline x 27 tooth gear was solved by machining out the inside of a 6 spline gear and fitting a 10 spline inner to it. A creative bit of work that eventually resulted in carnage inside the transmission.

 

Bubba's grandpa?

 

Maybe the original Bubba!!

 

My take on this is there was no reason that it wouldn't have worked if all the machining was correctly done. The big question I have is that with the T14, one assumes it had a 225 in front of it and how the hell did those two spot welds not come loose???? Places like Liberty Gears machine inserts like that and weld them in but those are REALLY welded and I assume they re-harden everything.

 

Yes, it had a 225 in front of it. I wish I could have seen it come apart. I'm not sure exactly how the rear output bearing of the T14 was retained and how the end play was set