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Old 03-15-2009, 03:17 PM
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questions on transmissions and transfer case parts from a newbie

Hi, trying to get a handle on some info on transfer case and transmissions for both fords and chevys. For some unbeknownst reason, it's now harder and more expensive to get parts for older ford and chevy trucks than for fairlanes. We are working on several older truck restoration conversions. Thought it would be fairly simple to find an adapter plate for a chevy that would convert the present np 203 to a better np 205. (Also, we have the option of keeping the 203 transfer case and completely rebuilding it. )Unfortunately, that seems close to impossible b/c we can't find the 32 spline input shaft to rebuild this particular case.
In the Ford world, it is getting very hard to find the tail shaft to convert a C6 to bolt up to the 205's. Several transmission dealers have told us they're not producing them anymore. we can still find the manual tranny stuff, but being a stubborn person, I really wanted to be able to find the automatic tailshaft. Does anyone know of any way around this. We don't want to work with the 203's if we don't have to b/c of the chain vs gear-driven issue in offroading. We wonder if this is just the northwest region or is this a problem in the whole country with finding this stuff? Most of our rigs are Ford 67-73, or chevy 69-79. We gave up on Ford 73-79 b/c of the 351 modified. Way too many complications. Any help at all would be appreciated.

thanks, newbie to offroad hobbies

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Old 03-15-2009, 05:58 PM
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If you know the OEM number of the parts you need and/or you know the casting numbers, do a Google search. You might find something that way.

Adapter housings for 205s have always seemed way hard to find for me in the last 25 years. The 32 spline 203 input was rare even when in production - the 27, 28, & 31 spline inputs have always been common.

C6 adapter housings should not be that hard to find. The really hard part is finding the 18-1/2" shaft if that is the one you need. 15-1/2" shafts are fairly common as are the matching adapter housings.

Last edited by mmerlinn; 03-15-2009 at 08:23 PM. Reason: 208 typo changed to 203
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Old 03-15-2009, 06:36 PM
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hi there,
32 spline 208 was very common '83-up and is what was used for 4 speed(CH465) and TH400 in all the chevies.

'83 was the first year for the 4 speed 32 spline change.

dirt common.

the year groups on ford and gm trucks is both '67-72

and then:

'73-79 ford

'73-80 chevy

if stuff is getting hard to find in WA then we have problems, because its been this way for about 15 or 20 years down here in the midwest. 4x4s and anything(car truck or van) older than late '80's is rare and long gone here., all went to shredder long ago and all the rest went last year when scrap prices were high.,

whats left is very far and few between.

get used to not being able to find stuff forever now.

Last edited by fast68; 03-19-2009 at 06:37 AM.
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Old 03-15-2009, 08:21 PM
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Quote:
Originally Posted by fast68
32 spline 208 was very common '83-up and is what was used for 4 speed(CH465) and TH400 in all the chevies.

'83 was the first year for the 4 speed 32 spline change.

dirt common.

***********

whats left is very far and few between.

get used to not being able to find stuff forever now.
208 inputs will NOT fit 203 transfer cases.

It will take longer to find stuff now and because of the extra time involved in finding it, the price will noticeably go up.

**********

And, yes, I did make a typo in my post, but he said 203 in the first post.
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Old 03-15-2009, 08:54 PM
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Novak and Advance Adapters are not only great sources for transfer case and tranny adapters, they both have some great tech on their websites about what fits what.

www.novak-adapt.com
www.advanceadapters.com
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