Converting a 72 Blazer to Automatic. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Deuce · 11-23-2006, 06:23 PM

I'm buying a 72 Blazer that currently has a 4spd in it and I was wondering what all is needed to convert to a turbo 350 or 700R4??

Could I buy a newer truck (80's) and install the tranny and transfer case from it to the 72?? I know nothing about 4x4's.

Heres a pic of her...................

VinceY · 11-23-2006, 08:00 PM

If you want a 1972 tranny and transfer case and can wait until Marchish they should be available if you need em.

1969k10stepside · 11-23-2006, 08:34 PM

You can convert it but will require a short tail shaft th350 if you choose it.You can take the tranny out of a 2 wheel drive but a different tailshaft will have to be used.You can use the tranny out of a 73-87 truck or blazer but the transfer case will be different depending on if it has a manual locking hubs(np205) or automatic hubs(np203 or 1980+ which would be a np208).You can use the transfer case in it now but you will need a different adapter plate.
I am in the same place and I am using the original transfer case and putting a short tail shaft on the automatic out of a 2 wheel drive.That is the easiest way IMO.BTW,that blazer should have a new process 205 transfer case in it.
I hope this helps.

Deuce · 11-23-2006, 09:45 PM

What adapter do I need?? Where can I get one?? The seller is also throwing in a auto flex-plate.

Deuce · 11-23-2006, 09:47 PM

Quote:

Originally Posted by VinceY

If you want a 1972 tranny and transfer case and can wait until Marchish they should be available if you need em.

Call me at 850-0225. Are they in good shape or do they need to be rebuilt??

1969k10stepside · 11-23-2006, 09:49 PM

Adapter plates can be bought at a junkyard,ebay,and here sometimes.A Np205 adapter plate for a TH350 is what you need.I dont know what part number it is or a more proper name for it.I think they may also be able to be bought new,I cant confirm this though.

1969k10stepside · 11-23-2006, 09:51 PM

If you plan to wait awhile my 2 wheel drive to 4x4 transmission conversion will be done and I will have the adapter plate so I can get you more info.

Deuce · 11-23-2006, 11:31 PM

I'm not in a huge hurry........................keep me in mind.

The 2WD thing has crossed my mind too..........................

1969k10stepside · 11-23-2006, 11:34 PM

Well,give me a month at the most,it sitting in the garage waiting.I will be sure to keep you in mind.I will probably post a thread about it when I am done.

Deuce · 11-24-2006, 11:22 AM

Quote:

Originally Posted by 1969k10stepside

I will probably post a thread about it when I am done.

That would be great!! Take lots of pics!!

VinceY · 11-24-2006, 02:52 PM

Corie,

Left a message for you with numbers to reach me.
Dave (can not remember his board name) gave me a 350 short that was working when he took it out. It's yours if you want it. I have it stored in Edmonton at my parents and can grab it on Dec15 th. Free is always the best price.
Actually I think you saw it sitting in the back on my blazer that day at Darrens.

Vince

11-23-2006, 06:23 PM	#1
Deuce Registered User Join Date: Apr 2004 Location: Calgary, Alberta,Canada Posts: 1,595	Converting a 72 Blazer to Automatic. I'm buying a 72 Blazer that currently has a 4spd in it and I was wondering what all is needed to convert to a turbo 350 or 700R4?? Could I buy a newer truck (80's) and install the tranny and transfer case from it to the 72?? I know nothing about 4x4's. Heres a pic of her................... __________________ I know what your thinking.......I have ESPN. Sometimes it's easier to do things the hard way. Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!!

11-23-2006, 08:00 PM	#2
VinceY Just need a couple more parts. Join Date: Jan 2005 Location: Calgary, Alberta, Canada Posts: 470	Re: Converting a 72 Blazer to Automatic. If you want a 1972 tranny and transfer case and can wait until Marchish they should be available if you need em. __________________ --------------------------------------------------- 1947 Studebaker M5 project to match the camping trailer. 1950 Chev 4x4 Pickup 1958 Shasta Airflyte Travel trailer (fresh restoration) 1971 C/10 Pickup(Frame off Restoration) 1972 K5 Blazer CST (Daily Driver & My Company Truck) 1976 Honda CB750 Bobber 1988 Jaguar XJ12

11-23-2006, 08:34 PM	#3
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: Converting a 72 Blazer to Automatic. You can convert it but will require a short tail shaft th350 if you choose it.You can take the tranny out of a 2 wheel drive but a different tailshaft will have to be used.You can use the tranny out of a 73-87 truck or blazer but the transfer case will be different depending on if it has a manual locking hubs(np205) or automatic hubs(np203 or 1980+ which would be a np208).You can use the transfer case in it now but you will need a different adapter plate. I am in the same place and I am using the original transfer case and putting a short tail shaft on the automatic out of a 2 wheel drive.That is the easiest way IMO.BTW,that blazer should have a new process 205 transfer case in it. I hope this helps. Last edited by 1969k10stepside; 11-23-2006 at 09:20 PM.

11-23-2006, 09:45 PM	#4
Deuce Registered User Join Date: Apr 2004 Location: Calgary, Alberta,Canada Posts: 1,595	Re: Converting a 72 Blazer to Automatic. What adapter do I need?? Where can I get one?? The seller is also throwing in a auto flex-plate. __________________ I know what your thinking.......I have ESPN. Sometimes it's easier to do things the hard way. Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!!

11-23-2006, 09:49 PM	#6
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: Converting a 72 Blazer to Automatic. Adapter plates can be bought at a junkyard,ebay,and here sometimes.A Np205 adapter plate for a TH350 is what you need.I dont know what part number it is or a more proper name for it.I think they may also be able to be bought new,I cant confirm this though.

11-23-2006, 09:51 PM	#7
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: Converting a 72 Blazer to Automatic. If you plan to wait awhile my 2 wheel drive to 4x4 transmission conversion will be done and I will have the adapter plate so I can get you more info.

11-23-2006, 11:31 PM	#8
Deuce Registered User Join Date: Apr 2004 Location: Calgary, Alberta,Canada Posts: 1,595	Re: Converting a 72 Blazer to Automatic. I'm not in a huge hurry........................keep me in mind. The 2WD thing has crossed my mind too.......................... __________________ I know what your thinking.......I have ESPN. Sometimes it's easier to do things the hard way. Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!!

11-23-2006, 11:34 PM	#9
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: Converting a 72 Blazer to Automatic. Well,give me a month at the most,it sitting in the garage waiting.I will be sure to keep you in mind.I will probably post a thread about it when I am done. Last edited by 1969k10stepside; 11-23-2006 at 11:35 PM.

11-24-2006, 02:52 PM	#11
VinceY Just need a couple more parts. Join Date: Jan 2005 Location: Calgary, Alberta, Canada Posts: 470	Re: Converting a 72 Blazer to Automatic. Corie, Left a message for you with numbers to reach me. Dave (can not remember his board name) gave me a 350 short that was working when he took it out. It's yours if you want it. I have it stored in Edmonton at my parents and can grab it on Dec15 th. Free is always the best price. Actually I think you saw it sitting in the back on my blazer that day at Darrens. Vince __________________ --------------------------------------------------- 1947 Studebaker M5 project to match the camping trailer. 1950 Chev 4x4 Pickup 1958 Shasta Airflyte Travel trailer (fresh restoration) 1971 C/10 Pickup(Frame off Restoration) 1972 K5 Blazer CST (Daily Driver & My Company Truck) 1976 Honda CB750 Bobber 1988 Jaguar XJ12

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