Transfer case upgrade

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Transfer case upgrade

Postby 67nukeford on Tue Nov 03, 2009 6:40 pm

I have the NP435 and single speed transfer case in my 67 4x4. Is there a 2 speed transfer case I can upgrade to? I was going to go to a 5 speed, but can't find one that will adapt to my 390 without costing a fortune. So, I'll stick with the NP435 (and maybe have it regeared, if possible), but I'd like to get a 2 speed transfer case. Is there one available for the NP435?

Thanks!
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Re: Transfer case upgrade

Postby 67F110 on Tue Nov 03, 2009 8:12 pm

I think the Dana 20 out of an early Bronco with an adapter will work.  Do a search in this forum and see what pops up.  It's been done.
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Re: Transfer case upgrade

Postby cep62 on Tue Nov 03, 2009 8:53 pm

You could also get a NP435 with a 205 gear drive out of a '76-'79.
You'll need the tranny because yours is a 2wd with a adapter.
The D20 would be a good choice and it even has a lower ratio, but it might cost more to covert.?
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Re: Transfer case upgrade

Postby 67nukeford on Wed Nov 04, 2009 7:33 pm

Thanks cep, I think that will be the direction I go. I need to find a donor for the power steering anyway, now if I could just find a truck with a good tranny and transfer case to donate with it!
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Re: Transfer case upgrade

Postby hazelnut on Wed Nov 04, 2009 8:44 pm

the bump F250 4X4s  come with 2 speed cases,dana 24s should bolt right in.
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Re: Transfer case upgrade

Postby Redcap on Wed Nov 04, 2009 10:04 pm

Divorced or married?

Definitely skip the Dana 24 (piece of crap) and head straight for the NP205, which is available in either version.
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Re: Transfer case upgrade

Postby 67nukeford on Thu Nov 05, 2009 10:22 am

Married. I've heard that about the dana also, so I'll stick with the 250.
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Re: Transfer case upgrade

Postby shaggys_bump on Thu Nov 05, 2009 11:58 pm

1970 F100 Ranger XLT SWB 302
2004 Nissan Murano
1998 Isuzu Amigo "v6 4x4 conversion comin soon"
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Re: Transfer case upgrade

Postby eggman918 on Sat Dec 05, 2009 2:46 pm

Dana 24, I just rebuilt mine at 750,000 miles, I have nothing bad to say about a 24, but they are getting hard to find. However if you have over 450 hp it would be worth finding a NP205.MY truck has a stout 390 and lives in 4WD . Oh well free advice......  Good luck :thup:
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Re: Transfer case upgrade

Postby 4x4freakfe427 on Mon Dec 07, 2009 3:39 pm

[quote="cep62"]You could also get a NP435 with a 205 gear drive out of a '76-'79.
Go with what this guy said mid to late 70's 4 speed and 205 case, but you will have to lengthen the front drive shaft or get the donor one and shorten the rear shaft or get the donor one to. I cant remember if you have to modify the cross member. I am in the prosess of doing this same thing on my 71 f100 shorty.
67 Highboy with 427FE 79 dana 60 front dana 70 rear 13" of lift 38" swampers. 72 F100 2wd short bed 302 toploader 4speed. 71 F100 shortbed 4x4 rust bucket. 68 F100 2wd long bed parts truck no rust.
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Re: Transfer case upgrade

Postby Redcap on Mon Dec 07, 2009 9:48 pm

eggman918 wrote:Dana 24, I just rebuilt mine at 750,000 miles, I have nothing bad to say about a 24, but they are getting hard to find. However if you have over 450 hp it would be worth finding a NP205.MY truck has a stout 390 and lives in 4WD . Oh well free advice......  Good luck :thup:


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