How to convert 4speed 205 Transfer Case to auto?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**rs74** · 02-07-2013, 12:06 AM

I have an 205 transfer case that is bolted to 465 4-speed. Is there any way to convert that over to bolt up to 350,400, or 700r4. I know they have different splined shafts. I don't see myself using the 4-speed and would like to keep the 205 transfer case. Can this be done easily.

andrewmp6 · 02-07-2013, 12:50 AM

Looks like you just have to rebuild it with the right input shaft for the trans you want.Take a look at http://www.northwestfab.com/Transfer...afts_c_74.html But im not sure on the bolt patern of the t case but they sell a adapter if needed tho.

CrewCab59 · 02-07-2013, 06:44 PM

The adapter goes with the trans , the inputs can be changed. all can be done with hand tools.

**rs74** · 02-07-2013, 10:13 PM

Is this something that can be done pretty easy by myself or should I take it to a transmission shop. I pretty much do all my own work but have never tore into a transfer case.

CrewCab59 · 02-08-2013, 09:45 AM

Quote:

Originally Posted by rs74

Is this something that can be done pretty easy by myself or should I take it to a transmission shop. I pretty much do all my own work but have never tore into a transfer case.

Yes, takes about 1 hr to change the shaft if you have never done it.

The adapter to mate to trans,input shaft ,new input seal,grease and gear oil and gasket or sealer for bearing retainer.

67swb72klb · 02-07-2013, 10:29 PM

i think it is just the input shaft on the t/c is different from auto to 4 speed swaped one out years ago

andrewmp6 · 02-08-2013, 03:14 AM

Wouldn't it be easier to rebuild the t case vs the trans tho?

jjzepplin · 02-08-2013, 09:00 AM

Advance adapters makes an adapter (coupler). Goes from the ten spline to the 30 or whatever it is for the auto trans. You will also have to find the automatic style "adapter". This piece goes between the transfer case and the trans. What trans are you going to use? Every trans has a different "adapter". Go on e-bay and look at all the different units. Just don't buy anything til you know exactly what to buy. Check with us first here and we will steer you right.

02-07-2013, 12:06 AM	#1
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	How to convert 4speed 205 Transfer Case to auto?? I have an 205 transfer case that is bolted to 465 4-speed. Is there any way to convert that over to bolt up to 350,400, or 700r4. I know they have different splined shafts. I don't see myself using the 4-speed and would like to keep the 205 transfer case. Can this be done easily. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

02-07-2013, 12:50 AM	#2
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: How to convert 4speed 205 Transfer Case to auto?? Looks like you just have to rebuild it with the right input shaft for the trans you want.Take a look at http://www.northwestfab.com/Transfer...afts_c_74.html But im not sure on the bolt patern of the t case but they sell a adapter if needed tho.

02-07-2013, 06:44 PM	#3
CrewCab59 Registered User Join Date: Jul 2010 Location: Knoxville,TN Posts: 1,185	Re: How to convert 4speed 205 Transfer Case to auto?? The adapter goes with the trans , the inputs can be changed. all can be done with hand tools. __________________ 1972 Custom Deluxe 20 4x4 burb 1971 GMC SWB CST 4x4 1972 GMC k20 4x4 (X- brush truck ) 1971 Chevy CST Blazer 4x4 1971 Chevy C/10 1970 Cab Chassis C30 157" 1971 Cab Chassis Custom 30 Deluxe 157" 292/4spd ( Napco Replica ) 1988 Chevy V30 4x4 wrecker challenger 4812

02-07-2013, 10:13 PM	#4
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: How to convert 4speed 205 Transfer Case to auto?? Is this something that can be done pretty easy by myself or should I take it to a transmission shop. I pretty much do all my own work but have never tore into a transfer case. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

02-07-2013, 10:29 PM	#6
67swb72klb Registered User Join Date: Dec 2010 Location: livingston co.mi Posts: 2,471	Re: How to convert 4speed 205 Transfer Case to auto?? i think it is just the input shaft on the t/c is different from auto to 4 speed swaped one out years ago __________________ California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project

02-08-2013, 03:14 AM	#7
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: How to convert 4speed 205 Transfer Case to auto?? Wouldn't it be easier to rebuild the t case vs the trans tho?

02-08-2013, 09:00 AM	#8
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,566	Re: How to convert 4speed 205 Transfer Case to auto?? Advance adapters makes an adapter (coupler). Goes from the ten spline to the 30 or whatever it is for the auto trans. You will also have to find the automatic style "adapter". This piece goes between the transfer case and the trans. What trans are you going to use? Every trans has a different "adapter". Go on e-bay and look at all the different units. Just don't buy anything til you know exactly what to buy. Check with us first here and we will steer you right. __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350



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