Ford NP205 to Chevy TH350???

[Dumb_Ass_2003]

My dad and I just finished rebuilding my 350 Chevy and got the TH350 rebuilt at a local tranny shop. Now, I need to know what I would need to bolt a Ford drivers side drop NP205 up to my TH350 (it's got the 4x4 output shaft). Would the input adapter from a Chevy NP205 with the proper spline count for a TH350 bolt right onto a Ford NP205? or am I going to have to spend some $$$'s on an adapter?

Thanx for the help,

[u2slow]

I dunno man... I don't see a cheap/easy way to mate that combo.

Maybe just use an 88-up GM NP241 with a Th350/np208 adapter

[zakk]

Why? 205's are very common.

Getting that combo to go would take alot more work than just buying a Chevy 205.

Or do you need a driver side drop?

[dog walker]

Can't even take a person seriously with a username like that!

[rustyfloor]

Ummm...

www.offroaddesign.com

should be able to get ya rollin somehow.

[Dumb_Ass_2003]

Originally posted by dog walker
Can't even take a person seriously with a username like that!

It's an aquired family nickname

And yes I do need the drivers side drop.

The only other option I can think of is to keep the weak NP231j and buy the pricey Adapter

Oh and thanx A LOT rustyfloor, thats the exact kinda info I've been looking for the last few days.

[masonmachines]

you could always use a divorced ford 205, that would require a yoke on the 350 though.

[Dumb_Ass_2003]

Originally posted by mtlehman
you could always use a divorced ford 205, that would require a yoke on the 350 though.

I'm gonna need some translation. How is a 'divorced' ford NP205 different from a non 'divorced' 205?

[Thomas792]

Im trying to do something along the lines of what you're doing except I'm going in a slightly different direction.

Offroad design has a lot of information and makes it sound rather easy to swap the different input shafts from one case to another.

The GM/Dodge version of the NP205 that came behind the SM465 and the TH350 had a "small" bearing for the input shaft and the ones that came behind the TH400 and later SM465 had a "large" bearing. The bearing size was dependent on the outside diameter of the input shaft. The early SM465 and TH350 input shafts were male, smaller in diameter, and required an internally splined adapter to mate to the transmission output shaft. The later SM465 and TH400 input shafts were female. larger in diameter, and required no adapter (one less item to cause problems).

To put the female input shaft into a male input shaft GM/Dodge NP205, the input shaft hole in the case needs to be bored to somewhere near 3.5 inches (best to measure the bearing to get an accurate figure) to make it a "large" bearing case. I would think that it is possible to put the male input shaft into a female input shaft GM/Dodge NP205, but you would need to get a new bearing with an inside diameter the same as your input shaft diameter and an outside diameter the same as the size of the input shaft hole in your transfer case.

That being said, I have seen and have been told that all of the NP205 that were in the Ford trucks were 31 spline female input shafts with the "large" bearing (supposedly same size as the GM case). From the information that I have gathered, input shafts from Ford and GM/Dodge are interchangeable save for the bearings. You should be able to put the 27 spline TH350 input gear from an NP205 into your Ford NP205 transfer case. I have been told by a couple of people that this will work but I have not tried it yet.

Ford NP205 transfer cases also have a 32 spline output shaft on the front which is the strongest one available and has several different options for driveshaft attachemt - flange or yoke.

I plan on buying a Ford NP205 ($20 - $40 from a salvage yard) and swapping all the components into my GM case. This will give me a 31 spline input (I will be putting this behind an NP203 reduction box so I'll need my shaft cut and splined anyway - 1 less spline should same some money) and 32 spline outputs front and rear which are the strongest available and it will let me rung the hi-angle driveline driveshafts (spelling?) front and rear.

Let us know if it works when you get it going.

[Starslope]

Why dont pick parts that fit? The difference in strength between a ford NP205 and GM NP205 cant be enough reason.

[Thomas792]

I have been trying to find a 32 spline NP205 input that came behind the TH400 for about 6 months now. I have not seen anything below about $200.00. Ford NP205 transfer cases can be bought at salvage yards for $20 to $40 and they came in quite a few different trucks but they are all 31 spline input and 32 spline output.

I want the high spline count input because I have heard that the 10 spline input is weaker and I do not want to run the coupler between two male shafts (TH400 output and NP205 input).

It's an availability vs a preference issue.

[Dumb_Ass_2003]

Originally posted by Starslope
Why dont pick parts that fit? The difference in strength between a ford NP205 and GM NP205 cant be enough reason.

Well this is all for my 91 YJ and my dad and I wanted to know if the Ford NP205 to TH350 would be possible in order to keep a drivers side drop. However I might have a good deal at a local autowrecker for a front D44 out of a Scout II, if this is the case then we will simply use our Chevy NP205 and not have to worry about input splines.

Thanx everyone for all the replies, they have been very helpful.

[u2slow]

Originally posted by Dumb_Ass_2003

good deal at a local autowrecker for a front D44 out of a Scout II,

Scout D44's have poor caster angle to begin with, and they're
hard(er) to change to spring-over because of the cast-in perch.

You an cut down one side of a Chevy D44 housing in a few hours with only a grinder, hammer, and chopsaw. Early-Bronco longside shaft is a good choice. This one was originally meant for a Sidekick, but it ended up in my buddy's YJ instead.

[Bigger Valves]

you could throw a 203 between the th350 and 205.. get the gm 203 to ford 205 doubler from ord.. just an idea.. and gives u an extra 2:1

[Dumb_Ass_2003]

Originally posted by u2slow
they're
hard(er) to change to spring-over because of the cast-in perch

That doesnt really matter to me, my Jeep is staying SUA.

As for the Chevy D44, I'm pretty sure theres one still sitting in my dads Jimmy at our farm.