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  #1  
Old 11-23-2006, 01:43 PM
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4x4fEvEr 4x4fEvEr is offline
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203/205 doubler ingredients

im gettin ready to buy all the pieces for my doubler and well i dont know what im lookin at

im gonna be runnin an NP435 so i want a 31 spline 203 right? and a married np205 right? both ford products? im only gonna use the front half of the 203 which is called the range box???? and this all goes together with a kit from (insert name of best kit here)
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  #2  
Old 11-23-2006, 09:16 PM
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get a 435(or t18) with a 205 attached. id avoid a t18 with a 208 if you want to go the doubler route,as the 208 will have a different stickout length for its input gear,and therefore possibly either a shorter tailsahft on the tranny,or a longer adapter.

i have been told that the ford 203 will have the same stickout for the input as the 205,and the same round NP pattern. im also told it doesnt matter if it comes from an auto or a manual,it will bolt on where the 205 was. this is just what ive been told,ive never laid my own eyes on a ford 203,so i cant really say for sure.

other than that,you have it figured out. youll disassemble and discard the chain section of the 203,and whomever you buy a kit from will either cut down and spline your shaft,or send you a shaft,and take yours as a core. as such,the range box will need disassembled to swap in an appropriately splined output shaft to slide into your ford 205.

the doubler adapter bolts onto the rangebox in place of the chain section,2nd t case bolts to the adapter. rig up the shifters, make some driveshafts and hit the trails

as for whose kit to use,i cant remember whose the guys were the most impressed with. imsure desertbeast or blt2krl will chime in on that one.
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  #3  
Old 11-24-2006, 06:49 AM
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Bama Burden Bama Burden is offline
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Northwest Fab was recommended to me because of the clocking ring. Although, I've heard there are shipping problems due to NWF being located in Cananda --- it takes a while to receive it
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  #4  
Old 03-24-2007, 06:35 PM
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Lightbulb

Quote:
Originally Posted by Bama Burden
Northwest Fab was recommended to me because of the clocking ring. Although, I've heard there are shipping problems due to NWF being located in Cananda --- it takes a while to receive it


When it comes to a doubler kit all I can say is that Northwest Fab is

And whats a coupla extra days for shipping when it comes to a superior set-up.

All I am waiting on now is my high steer/crossover kit and a few other odds and ends and I should be


Best of luck with your doubler and keep on
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  #5  
Old 03-24-2007, 09:32 PM
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I found that with my 3" body lift I could clock the front output down from where I had it by raising everything else up to level with the frame, this put the rear output up 3" higher (I'm fixing to CV it anyway so I'm not worried about the rear angle. May have to tilt the radiator to match the fan angle... or may even go electric by the time that's all squared away. I'm working in a 205 torque brace as well, then need to flange the ends of the crossmember to bolt it to the vertical part of the frame rail. Need to get some 1" poly bushings for the adaptor mount.
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  #6  
Old 03-25-2007, 02:12 PM
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looks snug Elliot. I'm also thinking of bracing my 205. i think i'll be boxing the frame first and then doing it.
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Quote:
Originally Posted by Topgun2mo
I would think boxing would limit the amount the frame could flex over obstacles which I think IMO would be a bad thing. I would think you would want all the articulation possible.
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Originally Posted by johnny019
I'm not saying lockers don't improve the performance of your rig, just that they're overrated.
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  #7  
Old 11-24-2006, 07:40 AM
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blt2krl blt2krl is offline
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Quote:
Originally Posted by 4x4fEvEr
im gettin ready to buy all the pieces for my doubler and well i dont know what im lookin at

im gonna be runnin an NP435 so i want a 31 spline 203 right? and a married np205 right? both ford products? im only gonna use the front half of the 203 which is called the range box???? and this all goes together with a kit from (insert name of best kit here)

You will want what ever 203 bolts to your transmission. Not positive the options on this cause I bought a TH400/203 combo. You will need a Married 205 unless your going to go the route like Crazy jeep. I think your setup would be best off with a married setup for better length. I.E shorter setup. You are correct only the gear box of the 203 is used. As far as using only ford products that depends on what fron axle you have. You can use a ford or chevy 203 and then either a ford 205 or chevy 205. The adapter that goes from the 203 to 205 can be setup for either ford or chevy 205. I know I pimp the NWF guys and the reason is noone elses kit on the market is as easy and installer friendly. Not to mention the clockability gives you more options than the rest. I was one of the first to buy their kit. I slapped the whole thing together only to find out the guy who rebuilt my tranny screwed up one of the clutch packs. I tore the whole thing apart agian. I called and talked to kyle, he sent me an entire gasket over night at no charge. Granted it was not an exspenvie deal to begin with but it won me over as a return customer. I have never had a problem with shipping and these guys have always bent over backwards for me. Who ever you decide to go with the doulber setup will put a smile on your face the first time your in double low.
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  #8  
Old 11-25-2006, 05:00 PM
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4x4fEvEr 4x4fEvEr is offline
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Quote:
Originally Posted by blt2krl
You will want what ever 203 bolts to your transmission.
im guessin for mine i need the ford 31 spline 203 which i have a lead on.

Quote:
Originally Posted by blt2krl
As far as using only ford products that depends on what fron axle you have.

well thats a toss up. i could go either way. i was planning on running a ford front axle, but the 205 for drivers drop is really going to have me cutting out some body material from underneath to squeeze it in plus rerouting my exhaust which i just had done, but i will have a highpinion 60 that way.

if i go with a chevy 205 ill have no issues except ill still be running a low pinion front axle. just a matter of if the HP will make the difference for the extra work.

Quote:
Originally Posted by blt2krl
You can use a ford or chevy 203 and then either a ford 205 or chevy 205. The adapter that goes from the 203 to 205 can be setup for either ford or chevy 205.

thats good news right there.



High pinion 60 with more labor and cost or low pinion 60 that will go in very very easily?
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  #9  
Old 11-24-2006, 09:18 AM
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Quote:
Originally Posted by 4x4fEvEr
im gettin ready to buy all the pieces for my doubler and well i dont know what im lookin at

im gonna be runnin an NP435 so i want a 31 spline 203 right? and a married np205 right? both ford products? im only gonna use the front half of the 203 which is called the range box???? and this all goes together with a kit from (insert name of best kit here)

Ford 203's are hard to come by, you just missed one on e-bay btw...
You don't actually have to use the Ford 203, if you can get the gear (NW Fab... or scrounging) you can redrill the front of an easy to find (and often cheap to free) GM 203. I have a drill template I can loan you when I get it back from another member

Your Ford NP435 will adapt to your AMC with a new input bushing for your flywheel, a ford clutch plate and a T176 bell (for the easiest adaptation). I bought a NW Fab adapter with the Ford 31 spline 203 gear as my GM 205 had the long 32 spline input that needed swapping out for a short input and the Ford 31 spline is real common and easy to scrounge up.
My range box is done and I just stuffed the gear in the gear in the 205 yesterday.
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  #10  
Old 11-24-2006, 09:23 AM
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Here's a Ford unit with 5 hrs to go on E-bay right now:

http://cgi.ebay.com/ebaymotors/New-Process-NP-203-Transfer-Case-Ford-Chevrolet-Dodge_W0QQcmdZViewItemQQcategoryZ33733QQihZ002QQit emZ120054487882QQrdZ1QQsspagenameZWDVW
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  #11  
Old 11-25-2006, 12:29 AM
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I'm probably not lucky enough for some one to have come out with a kit that uses the 208 for a range box yet am I? Looking at some options for the J20 but I was planning on keeping my T18(a??) nice low first gear, I like it
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  #12  
Old 11-25-2006, 04:15 AM
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Quote:
Originally Posted by mud_slinga
I'm probably not lucky enough for some one to have come out with a kit that uses the 208 for a range box yet am I? Looking at some options for the J20 but I was planning on keeping my T18(a??) nice low first gear, I like it

The NP435 is lower yet...and a bit more versitile box. PTOs on both sides if I recall.


aa
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  #13  
Old 11-25-2006, 07:27 AM
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Cecil is right, the Ford NP435 is 6.68:1. If you have the '80+ T18 that fits the NP208 then you have a 31 spline output and round pattern that should bolt directly to a Ford 203 range box. You should be ready to rock mud_slinga!
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