Sm420 To Dana 18

here's the catch 22
T14 output is 10 spline . so OD is 10 spline also
you do the swap your going to be 6 spline on output shaft
going to need new bull gear for OD to work

 

I will ask the guys at Novak about that. They did not say anything like that when I called them about my setup and asked what exactly I need

 

Yes, the T-14 has 10 splines. You will need a new planetary gear for the overdrive that matches the spline count of the new main shaft for the SM420 (6 splines). Or, you could leave off the overdrive and use a 18-8-23 output gear that has 6 splines.

Also look here regarding the PTO - Overdrive Parts and Accessories | Herm The Overdrive Guy

 

The Novak adapter kit Adapting the GM Muncie SM420 to the Jeep Dana Models 18 & 20 Transfer Cases can be purchased in either 6 or 10 spline stub shaft assemblies.

 

Herm does have the adapters to run pto and od i inquired recently as id like to have od at somepoint but keep my pto

 

I originally desired a PTO winch until I learned about the limitations of such a system. If you do go and spend all that time and money getting a PTO winch setup together make sure you do your research first and decide it's what you want. I love old school tech and I did want a PTO very badly but after looking at the pros and cons I wound up going electric.

 

going electric is good for short use
PTO will work all day long . unless engine gives out

 

Correction it’s a 8074. Still really big and I’m not sure if I want this on my Jeep.

 

Wow, that a giant old cool hunk of something. Make it work, if you dont like it, Im sure someone might buy it.

 

I’ve been taking peeks at it all day. It’s kinda growing on me. That part of me is saying yes, paint it and put it on your bumper!

 

I have the AA adapter, unused, for an SM420/dana 18. It is the type that replaces the whole shaft. I don't know if it is acceptable to post prices and personal contact info in this forum. please PM me here.

The 8074 was an interim winch between the more or less current 8274 and the older Warn 5687 (also referred to as Warn 6000) The Warn 5687 is a duplicate of the Bellvue winch that Warn purchased I have working examples of all 3 in the basement

 

The 8074 was an interim winch between the more or less current 8274 and the older Warn 5687 (also referred to as Warn 6000) The Warn 5687 is a duplicate of the Bellvue winch that Warn purchased I have working examples of all 3 in the basement

 

If he dosent want it pm me with price and info

 

I found a local who had a rebuilt SM420 with the 10 spline spud adapter for $300. I’m picking it up on Tuesday. Looks like I’ll have something to do this winter.

 

Interested in a 4 speed for my early cj, is the AA adapter still available? In Oregon

 

She’s ready to go in! Just dropped off my drivelines this morning. I’ll have it installed tomorrow night.

 

Nice! I'm sure you'll be quite pleased with the results.

 

Since the t14 was a 10 spline output I swapped the main input gear to a 6 spline 18-8-23 (29 tooth). I’ll be running without the O.D. for now. At least until I can afford one. I have the transmission in position under my Jeep right now I just need to align it and slide it into position. My drivelines are done And they look amazing.

 

You don't need a whole new od, just need to replace the planetary hub with a 6 spline version. I bought one from Advance Adapter for about $300.
It does require a complete teardown of the overdrive unit though.

 

Well... in the last month I’ve put in about $900 into my Jeep and it’s getting to be Christmas time so I have to get some money built up to buy some gifts for my parents.