transfer case adapter question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dons454s · 11-24-2005, 12:29 AM

Hey Guys
Its been a while since I messed with these older chevy trannys. I have a 79 chevy here with a 400 auto and full time case. The tranny is bad. I have a rebuilt 350 turbo that I want to put in it what do I need to find as far as a transfer case adapter?
Thanks Don

1976K5CHALET · 11-24-2005, 03:00 AM

You'll need a TH350 to NP203 adapter. Really common so the cost at a bone yard won't be much. You might also call offroad design at 970-945-7777...stephen has lots of them i believe since a key ingrediant to his doubler is the forward section of a NP203. His web site should also have pictures of what your after.

Doug Wright

dons454s · 11-24-2005, 10:14 AM

Quote:

Originally Posted by 1976K5CHALET

You'll need a TH350 to NP203 adapter. Really common so the cost at a bone yard won't be much. You might also call offroad design at 970-945-7777...stephen has lots of them i believe since a key ingrediant to his doubler is the forward section of a NP203. His web site should also have pictures of what your after.

Doug Wright

Thanks I will check that out
Don

b454rat · 11-24-2005, 10:53 AM

Need to change the input gear too. 350 is 27 spline, 400 is 32.

**kwmech** · 11-24-2005, 12:25 PM

If going thru all the changes, now would be a good time to upgrade the t-case to a 205.

11-24-2005, 12:29 AM	#1
dons454s Registered User Join Date: Nov 2004 Location: Claysburg, Pa Posts: 408	transfer case adapter question Hey Guys Its been a while since I messed with these older chevy trannys. I have a 79 chevy here with a 400 auto and full time case. The tranny is bad. I have a rebuilt 350 turbo that I want to put in it what do I need to find as far as a transfer case adapter? Thanks Don

11-24-2005, 03:00 AM	#2
1976K5CHALET Senior Member Join Date: Jan 2003 Location: Grand Junction, Colorado Posts: 610	Re: transfer case adapter question You'll need a TH350 to NP203 adapter. Really common so the cost at a bone yard won't be much. You might also call offroad design at 970-945-7777...stephen has lots of them i believe since a key ingrediant to his doubler is the forward section of a NP203. His web site should also have pictures of what your after. Doug Wright __________________ Doug Wright aka K5NUTT over @coloradok5.com Owner of http://groups.yahoo.com/group/ChevyK5BlazerChalets Certified K5 Nut

11-24-2005, 10:53 AM	#4
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,469	Re: transfer case adapter question Need to change the input gear too. 350 is 27 spline, 400 is 32. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS

11-24-2005, 12:25 PM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	Re: transfer case adapter question If going thru all the changes, now would be a good time to upgrade the t-case to a 205.



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