14bff interchange? 203/205 Doubler?

[76zimmer]

I have a Cab&Chassis 14bff axle with 4.56 gears and an open diff in it. I also have a 79 3/4 14bff with 3.73 and gov lock in it. I want the 4.56's to put in the 3/4t axle housing to put under my Blazer.

1)Can I use the whole carrier and diff. assy from the C&C axle and properly set it up to the 3/4t housing?
2)I also want to add a Detroit to the C&C carrier, which should work being that it is open already right?

3)The 4.56 carrier will have to be set up to the 3/4t housing because it is a different housing right?

4)Will the axleshafts out of the 3/4t housing work without modification in the C&C diff with the addition of the Detroit?

5)I know the 3/4t housing is a bolt in, I will be adding a T400/205 combo when I do this, so I'll pretty much have to build a new driveshaft right?
I think it has a 350/203 in it now.

6)I will be adding a 6-8" lift to this project, will it be advantageous to adjust the pinion angle at this time?

7)Give me some ideas on lift spring kits or other mods to get the 6-8" lift, like the shackle flip etc.

thanks, Zim

 

[jt512]

Ok, I think I can answer most of those, and if I'm wrong on any of them, someone else will set me straight .

1) yes
2) yes
3)I believe so, since even though they are both 14 bolts, just like anything else no two are exactly the same
4) not sure, I think all the shafts are the same and the width difference is in the hubs, but again not 100% on that one
5)I would say yes, and looking at question #6, deffinetly yes
6)I would set you pinion angle once the lift set up is finalized
7) Hard one to answer, what are you going to use the rig for, are you looking for flex, do you want to load it up or tow with it? There are lots of options on how to lift our rigs but alot depends on what you hope to acheive other then just being higher.

If I am wrong on any of these , sorry, and if someone else corrects me then we will both have learned something new today

 

[dremu]

4)Will the axleshafts out of the 3/4t housing work without modification in the C&C diff with the addition of the Detroit?

Should do. The C&C 14BFF is the same outside width as the SRW, so the shafts should be identical.

-- A

 

[76zimmer]

Usage will be a combination of all off road terrains, mud, sand, water, rocks, anything I can find. I know the suspension setup will be a compromise for any one thing, but I only want to have one rig, and need it to do everything good, not excel at only one thing. There will be no loading, other than spare stuff, toolbox, spare tire, jack etc. No towing either. The rig may be driven to/from most close locations (within 150 miles or so) but if outside of that, it will be trailered for sure. It does need to be street legal for the most part.
another question. I've searched some for a 203/205 doubler, and think I might as well get this done right now, so I'm not buying 2 sets of driveshafts.
So anybody got a good line on info to do this conversion?

Thanks a ton, Hopefully I can put myself in a position to make a run at doing this project now. Just need to find the time pretty quickly to get it started. Just to damn many things on the list of stuff to get done. Time to reprioritize?

 

[76zimmer]

I'm looking for a how to article on the doubler set up. I have a Ford 203, and Chevy 203/350, and a T400-205 and a T-350-205. I plan on using the T400 setup, but can canibalize parts as needed. I figure I have to change the input to the 203 for the range box, as I don't have a 203 from a T400, get the doubler plate, and what else?
What ya got for me?

 

[76zimmer]

Anybody....Bueller....TTT

 

[dremu]

Anybody....Bueller....TTT

ORD's catalog page has some good info. It does depend on whose doubler adapter you're gonna use.

I donno what questions you have specifically; in my case I had a '203 that fit my tranny, I got a 205 for a TH400, the ORD adapter, and plugged it all in. Added a crossmember, new front driveshaft, rear one was about right, especially after I did the shackle flip it mighta been a bit short anyway.

Other people go through all kinds of weirdness trying to make range box (x) fit transfer case . If you're using, say, the NWF adapter, or some other one, the requirements for range box and t-case may vary.

-- A

 

[76zimmer]

From what I've read the rangebox (203) has to match the output of the transmission (T-400) regardless of the adapter used, right?
Then the adapter plate, then the output t/c (205 from the T-400)

What did you use for shifters? twin stick it, or triple?
Levers or cables?

 

[4X4HIGH]

You need a 203 range box that fits whatever trans you are using, then you need someones doubler adapter which gives you obviously the adapter and intermediate shaft to connect between the range box and t-case, then you need a short 32 spline input 205. In some instances people use a 31 spline ford t-case and in this case you need to make sure whoever you buy a doubler kit from knows which 205 input you plan to use. I like the ORD shifters, and if you grind the rail in the 205 then you can get triple stick shifters.

 

[sweetk30]

Anybody....Bueller....TTT

just bustin your ball but easy search in the tech section found this at the top http://coloradok5.com/forums/showthread.php?t=253000 step by step with tons of pics for a reman 203 range box and 205 32 spline in and out's with triple stick.

i have a 400/203 adaptor super clean left over as i redrilled to a round 6 pattern. drop me a pm if you want it super cheep. then just get the 32 spline input. you might need the short 400 32 spline output as well. i dont have that.

 

[76zimmer]

Hey Brett....I'll confess I didn't do a search, just looking at ORD, and NWF sites for the info. Do you know if a 350/203 has the 32 spline input?
As soon as I get all these parts in one place, I'll check em out to see what I need to put this together. I'll let you know on that adapter too.

"then you need a short 32 spline input 205."

Scott, can you explain this a little better as to exactly what the short 32 spline input is. Is there a couple different lengths of input shafts or is it the input housing length?
I have a T400/205 or a T350/205 right now. Would either of those be the short 32?

Thanks guys.

 

[sweetk30]

if the 400/205 is a fig 8 style tcase its the correct input required for a doubler kit.

th350 has 27 spline output shaft
th400 has 32 spline output shaft

205 tcase has 10 spline from sm465 stick tranny.
205 tcase has 27 spline male from th350 tranny.
205 tcase has 32 spline female short from th400 till 84 year.
205 tcase has 32 spline female long from th400/sm465 85-up year.

th400 shaft length pic chart.

best i can say is read all info on ord site in regards to doublers.
then read this here. http://coloradok5.com/orddoubler.shtml
then read mine i posted here.

after all of that make your choice. i did a lot of reading before i scored all my parts and built my setup.

 

[4X4HIGH]

Hey Brett....I'll confess I didn't do a search, just looking at ORD, and NWF sites for the info. Do you know if a 350/203 has the 32 spline input?
As soon as I get all these parts in one place, I'll check em out to see what I need to put this together. I'll let you know on that adapter too.

"then you need a short 32 spline input 205."

Scott, can you explain this a little better as to exactly what the short 32 spline input is. Is there a couple different lengths of input shafts or is it the input housing length?
I have a T400/205 or a T350/205 right now. Would either of those be the short 32?

Thanks guys.

The short 32 spline would be a TH400 version 205 with the figure 8 pattern. If you're going to run a TH350 trans you need a TH350/203 range box with the adapter.

 

[76zimmer]

OK my T400 is an 85 model, so thats probably a 32 long, which isn't what I need then?
I'll get back with my junk and see what we got here.

thanks Scott, and Brett.
I'll be back.

 

[4X4HIGH]

OK my T400 is an 85 model, so thats probably a 32 long, which isn't what I need then?
I'll get back with my junk and see what we got here.

thanks Scott, and Brett.
I'll be back.

Isn't the 85 t-case a round pattern case? I'm pretty sure it is but in the event that it's a figure 8 case you can easily swap a short 32 spline input into the case. Noone that i'm aware of makes a round pattern doubler.

 

[76zimmer]

I'll check it out Scott, thanks for the update. I guess I'll cross my fingers now.

 

[sweetk30]

you can get round doublers. just most of us run the old fig 8

 

[4X4HIGH]

you can get round doublers. just most of us run the old fig 8

Who makes a round pattern doubler? ORD and NWF only sell figure 8 pattern. Oh wait, maybe it was WMS that used to sell a steel round pattern that you had to weld together yourself?

 

[onetonbb74]

ord does, I have a round pattern 205 adapter from ORD, took the long 32 spline input out and used the short input and bolted in right on. That round 205 took longer to find then my dana 60 front.

 

[onetonbb74]

Jeds doubler is the weld together yourself and my friend has that doubler and only works w/ the round pattern 205. Ive never seen an figure 8 doubler adapter in person I guess.