NP435 2WD Transfer Cases

[1969f1004x4SB]

Hello, my truck (‘69 F-100 4x4 ShortBed 360) has got the NP435 with a Dana 21. From what I’ve read that’s the only transfer case that’ll directly match the transmission right? I got a couple of questions for upgrading the transfer case:

1) Are there any good transfer cases I can directly attach to the NP435 in place of the Dana 21 with a Hi-Lo range?

2) Do I need the Novak adapter to use a different transfer case? If so, will this affect how the transfer case attaches to the cross-member?

3) Is it possible to put a Dana 24 in this truck?

4) Will I need to cut up the floorboard to fit the two handles of a new transfer case?

Thanks all!

[cep62]

You could get a NP 435 and married 205 T case from a '76-'79 truck.
You'll probably have to do some fab work on the rear crossmember.
Better yet buy a whole parts truck and adapt the power steering and disc brakes too.
Also get the front drive shaft , and you'll need to shorten the rear.

[1969f1004x4SB]

Holy smokes that would be a lot of changes. I had the transmission rebuilt about a year ago so it’d be a shame to have to throw it into storage. I’ll look into that though, thanks!

[cep62]

I had the transmission rebuilt about a year ago so it’d be a shame to have to throw it into storage.

You could change the output shaft to a 4wd one and keep your rebuilt parts. and get a 205.
I don't think there's enough room for a divorced T case in a short box. And that would take a lot more fab work.

[1969f1004x4SB]

I’m OK with doing some fab as long as it’s not removing much material from the cross member. Are you talking about the Novak adapter for changing it to a 4WD?

[cep62]

I was thinking of getting a NP 435 and married 205 T case. You can swap the output shaft with your rebuilt trans.
No matter what you do you'll need driveshafts.

What are your plans with the truck? I've put in a lot of years with these trucks , unless you're doing a lot of serious off road , the stock T case and creeper gear will serve you well.

[1969f1004x4SB]

I was originally doing a lot of rock climbing (any rocks that could be climbed with it), but I’ve moved and am now in an area with mud, sand, and steep wet hills. I was looking to just find a transfer case with a low range for crawling over fallen trees.

I’m no professional off-roader, just thought it would be nice to have a low range for 4wd. I’m open to advice.

Just to make sure I’m following; the output shaft is that ~6” extension piece between the transmission and the transfer case right?

[cep62]

The output shaft is actually part of the transmission. Then the adapter between the trans and T case holds things together.
There are actually two different lengths for the automatics. "78-"79 Bronco had longer ones than the trucks.
I'm not sure about the 4 speeds.