203 transfer case swap with a 205 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dallen17 · 03-29-2018, 09:47 AM

My 203 transfer case went out on my 79' Chevy k20. Actually it exploded and now my daily driver is sitting In my garage. After doing some research, I have decided to swap the 203 with a built 205 tcase. Does anyone have any advice on what I'll need or anything that can help is appreciated!
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sweetk30 · 03-29-2018, 05:07 PM

if the trans is th400

shifter assembly is different .

adaptor is different .

output shaft in trans is longer . 203 is shortest . the rest are longer for each combo .

driveshaft lengths will be different .

otherwise its a fairly straight forward swap .

let me know if you scrap the 203 . drop me a pm .

wildwilly4x4 · 03-29-2018, 07:36 PM

If your trans is a th350, then a 205 will be a bolt on affair... If you're running a th400 a trans rebuild will go along with the swap just fine. Doesn't cost too much to just throw in a banner kit when you swap outputs provided your trans is working fine now.

sweetk30 · 03-29-2018, 10:01 PM

yes forgot to post that info on my post . fixed it .

03-29-2018, 09:47 AM	#1
Dallen17 Registered User Join Date: Feb 2018 Location: Sidney, Ohio Posts: 9	203 transfer case swap with a 205 My 203 transfer case went out on my 79' Chevy k20. Actually it exploded and now my daily driver is sitting In my garage. After doing some research, I have decided to swap the 203 with a built 205 tcase. Does anyone have any advice on what I'll need or anything that can help is appreciated! Posted via Mobile Device

03-29-2018, 05:07 PM	#2
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: 203 transfer case swap with a 205 if the trans is th400 shifter assembly is different . adaptor is different . output shaft in trans is longer . 203 is shortest . the rest are longer for each combo . driveshaft lengths will be different . otherwise its a fairly straight forward swap . let me know if you scrap the 203 . drop me a pm . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great. Last edited by sweetk30; 03-29-2018 at 10:00 PM.

03-29-2018, 07:36 PM	#3
wildwilly4x4 Registered User Join Date: Aug 2009 Location: Sunray,TX Posts: 251	Re: 203 transfer case swap with a 205 If your trans is a th350, then a 205 will be a bolt on affair... If you're running a th400 a trans rebuild will go along with the swap just fine. Doesn't cost too much to just throw in a banner kit when you swap outputs provided your trans is working fine now.

03-29-2018, 10:01 PM	#4
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: 203 transfer case swap with a 205 yes forgot to post that info on my post . fixed it . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.



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