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  #1  
Old 01-28-2010, 08:14 AM
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New Process t-case bolt pattern measurement

Can anybody confirm the round 6 bolt mounting pattern of a New Process transfer case for me? The closest measurement I can get is 6 x 6.75" center of hole to center of hole.

Thanks
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Old 01-28-2010, 01:04 PM
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How are you getting two measurements? It looks like you are measureing he radius for ID/OD but it is proably wider than that. Or are you looking for something else like the bolt pattern, which varies among makes.
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Old 01-28-2010, 01:26 PM
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Some place in the off-road section is a post started by Jeeps&Guns (IIRC) about the pattern and hole spacing. I was able to scan the adapter and get it into a .dxf file and then someone (sorry I forgot who) was able to pull the degree spacing (it's not symetrical) of off that file.
Not sure if that's what you are after.
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Old 01-28-2010, 01:43 PM
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I am trying to get measurements for a spacer to fill the 1" gap between my AW4 and NP208. It is the 6 bolt pattern used on most of if not all Jeep t-cases since the 80's, but you are correct about it not being symmetrical. I'll search the off-road tech section for the thread.
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Old 01-28-2010, 04:02 PM
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Are you looking for a spacer or looking to make a spacer.

I'm sure any place that sells clocking rings could whip up something for you quick and not to pricey.
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  #6  
Old 01-28-2010, 09:20 PM
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Quote:
Originally Posted by addicted
I am trying to get measurements for a spacer to fill the 1" gap between my AW4 and NP208. It is the 6 bolt pattern used on most of if not all Jeep t-cases since the 80's, but you are correct about it not being symmetrical. I'll search the off-road tech section for the thread.

Somebody will correct me if I'm wrong but I'm pretty sure Jeep is the same a Dodge and Dodge is the same as Ford and GM is the same with the exception of two holes.
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Old 01-28-2010, 09:23 PM
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Just did some more measuring in my balmy 7 degree garage and discovered that 7/8" is just about perfect and Novak's D300 flip or clock adapter to the AW4 is 7/8". So I am going to give them a call tomorrow and see if they will sell just the ring without the studs and seal.

On a side note Advanced Adapters is a lot like Clifford performance when it comes to how proud they are of their products, they want twice as much for their kit as Novak that does the same thing.
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  #8  
Old 01-28-2010, 09:25 PM
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Quote:
Originally Posted by Elliott
Somebody will correct me if I'm wrong but I'm pretty sure Jeep is the same a Dodge and Dodge is the same as Ford and GM is the same with the exception of two holes.

The round 6 bolt NP pattern is the same for all with GM being the exception mostly with their earlier stuff, i'm pretty sure they went to the same pattern in the mid 90's IIRC. THe only thing different is the clocking which can vary greatly.
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Old 01-28-2010, 09:28 PM
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This is a pilot drill template I made of the Ford pattern, I think if you exclude the one pilot hole for the locating pin it's the same as the Dodge/Jeep and I can take measurements off that if you want. I used this to put the round pattern on the front of my GM NP205 range box for my doubler.

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Old 01-28-2010, 09:44 PM
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Quote:
Originally Posted by Elliott
This is a pilot drill template I made of the Ford pattern, I think if you exclude the one pilot hole for the locating pin it's the same as the Dodge/Jeep and I can take measurements off that if you want. I used this to put the round pattern on the front of my GM NP205 range box for my doubler.


Measurements from it would be great if you don't mind. That is the only real roadblock I still have on possibly having Millerluck make one for me instead of having to take the stuff to a local machine shop.
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Old 01-29-2010, 05:23 AM
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Here you go:

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  #12  
Old 01-29-2010, 09:00 AM
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That is exactly what I needed, thanks Elliot.
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i bet it was Simon....
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Old 01-29-2010, 03:05 PM
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Good deal, and if anyone is planning to drill the ford pattern onto a 203 like this I over clocked it a lil there so my doubler mounts will need adjusting at the crossmember (a lil higher on the passenger side). Not a big deal but...

Uh, I left out one digit on the alternate pattern there so I'll edit the drawing where is shows 3.5, should be 3.35
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Last edited by Elliott : 01-29-2010 at 03:07 PM.
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  #14  
Old 01-30-2010, 08:25 PM
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The 6.8 and 3.35 don't work for a true half hex. It would be 6.70 if it were a true half hex. Then the added fun of the to odd ones on the right.

I can draw the holes 3.35 apart on a 6.8 bolt circle starting top right and work my way around CCW then come up with the alternating patern with the 3.6 and 3.35 coming down from the starting top right.

So yeah I can draw it just like you see it.... but it's strange.

Larry
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Old 01-31-2010, 11:26 AM
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Here's what I have.

http://mysite.verizon.net/lsjlmiller/np.pdf


I can pull X and Y locations from these numbers to drill the spacer.

Later

Larry
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  #16  
Old 01-31-2010, 04:41 PM
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I will try to explain this stuff to the best of my ability.

The spacer will need to be 7.25" in diameter and .80" thick. There is a machined hole in the AW4 tailhousing that measures 4.885" in diameter that matches the diameter of the input housing centering tangs. Those tangs stick off of the NP208 face by .475" The machined hole in the tail housing is .440" deep. So i'm figuring for added support there will have to be a lip that sticks off the spacer into the output housing machined hole.

Here are some pics of the NP208 input and the AW4 output housing.







Larry, let me know what you think, if you have any other questions and an approximate cost to get the spacer made up.

-Simon
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Originally posted by Ristow
i bet it was Simon....
he's such big meanie that way...
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  #17  
Old 01-31-2010, 05:53 PM
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I believe I understand.

You need a spacer .8 thick, 7.250 O.D.
A 4.885 c'bore .500 deep to fit the 208
On the other side you need a 4.885 boss .415 long to fit in the AW4.

What size thru hole will work?

Does the bolt pattern for the Ford look right to you?
If yes then I'll drill them how big?

I'll have to get with you on a price. I need to get a quote on some steel.

Larry
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88GW "Mississippi" 401,Edelbrock heads,and stuff,
4" Skyjacker, BFG AT's,OBA,Air Horn.

'89GW "Mutt" wood for now, 360, 1405, Edelbrock cam,
4"Rusty's,3"body,33"BFG. Detroit Truetrack Warn Hubs

The Metal Workshop
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Last edited by Millerluck : 01-31-2010 at 06:12 PM.
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  #18  
Old 01-31-2010, 06:12 PM
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It will basically need to look like the adapter on this page only without the clocking holes. http://www.novak-adapt.com/catalog/kit_153.htm
The holes need to be big enough to fit a 3/8" stud through.
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i bet it was Simon....
he's such big meanie that way...
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  #19  
Old 01-31-2010, 06:18 PM
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Oh, and the Ford pattern is the same as the NP series t-cases our rigs use so the measurements are the same.
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Originally posted by Ristow
i bet it was Simon....
he's such big meanie that way...
please don't tell him i said that....
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  #20  
Old 01-31-2010, 07:20 PM
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Ok I'll dig out an old 727 and try and confirm numbers for the bolt pattern.

Larry
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4" Skyjacker, BFG AT's,OBA,Air Horn.

'89GW "Mutt" wood for now, 360, 1405, Edelbrock cam,
4"Rusty's,3"body,33"BFG. Detroit Truetrack Warn Hubs

The Metal Workshop
http://www.themetalworkshop.com/index.html
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