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Ford ZF-6 - 24 spline output with a passenger's side drop t-case - doubler?

Grendel

Grendel

Iron Sharpens Iron
Joined
May 19, 2020
Member Number
297
Messages
3,582
So I have a 7.3L ZF-6 with fresh clutch and total rebuild. Also have the 271 that came behind it. It's 24 spline.

I am sticking this behind a 6bt Cummins in my 1941 Chevy G506.

I bought a passenger side drop 14B front from TTRAxle&FAB with all the goodies. He's re-building, cut him some slack, we all need grace.

I also bought a NP205 case from Tyler@TMI , to replace the 32 spline Chevy figure 8 NP205 I have here - kick ass shit.

Getting a 2.71 doubler in there is worth the extra dough.

The thought process is to gut the NP271 and build an intermediate box, with the 271 guts to a 32 spline output shaft.

Anyone know of a "black box, strong box or whatever box" that will take the 24 spline 271 input?

Pic for attention.
 

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I got Behemoth to add 24 spline this morning. That's based on the fact it would take my 271 input.

That was after researching and posting here.
 

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benw said:
its not their fault you suck at web wheeling :flipoff2:

1721404831872.png
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Yeah, but in my defense, and others, I wasn't sure that's for ALL/ANY 271/273 based gears.

When I order, I will verify.
 
... and Behemoth's missed their 3 month order date on the heat treat for the input shaft. Having Behemoth PTSD. Sending all their stuff back for a refund in a "few days" according to them.

I am back to looking for a 24 spline input under drive to a 32 spline output.

I may change the output shaft on the transmission to 34 spline and go with something off the shelf.
 
benw said:
Yes the ecobox comes in an Hd version that takes the np271 guts
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Actually... they said this:

"Ok we don’t offer he shorter stronger EcoBox-205 for a GM Round. We do offer it for the GM Fig.8 Small Bore which are easy to find and it doesn’t"

They want me to get a figure 8 32 spline case and use the Ford guts with the GM 32 spline input. I think I have one.

Edit: Except I will probably do stock gears into a TMI case.
 
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Grendel said:
Actually... they said this:

"Ok we don’t offer he shorter stronger EcoBox-205 for a GM Round. We do offer it for the GM Fig.8 Small Bore which are easy to find and it doesn’t
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With replace-a-case 205s (Magnitude/Colossus) getting off the ground, 6 hole round patterns would make sense to offer.
 
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Yeah... I bristled a little about that ... then he called me, so I deleted it.

Edit to add: If I do the TMI case, all my shifter location problems go away with the NWF box. They won't warranty anything but the short box behind a Cummins/ZF6 and in front of NP205 stock gears.

I get it.
 
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Grendel said:
If I do the TMI case, all my shifter location problems go away with the NWF box. They won't warranty anything but the short box behind a Cummins/ZF6 and in front of NP205 stock gears.

I get it.
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Aren't the shifter locations on any of the boxes sort of in the same area? I'm going ORD in front of my Magnitude and hoping I don't run into issues.
 
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Sean said:
Aren't the shifter locations on any of the boxes sort of in the same area? I'm going ORD in front of my Magnitude and hoping I don't run into issues.
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Not that I know of. TMI moved them, as far as I know. NWF said no issues with clocking with his case.
 
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