What's involved switching from a manual to auto - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ScottH** · 07-22-2008, 02:22 PM

My son is getting a 66 lwb w/283 soon and he wants to convert it to an auto from the three on the tree. We already have a turbo 350 so he plans to go with that trans. Can anyone shed some light on what's needed for trans mount, drive shaft mods, e-brake changes, or anything else we need to be aware of?

Any help or suggestions would be appreciated.

Thanks.

Scott

Fastrucken · 07-22-2008, 02:56 PM

You'll have to cut the 3 speed crossmember out. It will not be needed and will be in the way.

you'll need a transmission crossmember. One from 73-87 will work just fine.

Your drive shaft modified to fit the new transmission. in my old LWB I got rid of the 2 piece and went with a single drive shaft.

I don't think that you'll have to mess with the parking brake as the 66 didnt use the trans crossmember like the earlier years did.

Although you already have the th350 if its going to be a daily driver consider using a 700r4. It will be more enjoyable to drive and will save quite a bit in gas money

Graham

**ScottH** · 07-22-2008, 03:16 PM

Thanks Graham. Can u tell me if a auto xmember from a 72 C10 would work as well?

Fastrucken · 07-22-2008, 03:30 PM

Quote:

Originally Posted by ScottH

Thanks Graham. Can u tell me if a auto xmember from a 72 C10 would work as well?

It should.....

Graham

LostMy65 · 11-02-2010, 09:54 PM

This is an older thread, but I like how it goes into what's involved.

Thanks

07-22-2008, 02:22 PM	#1
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	What's involved switching from a manual to auto My son is getting a 66 lwb w/283 soon and he wants to convert it to an auto from the three on the tree. We already have a turbo 350 so he plans to go with that trans. Can anyone shed some light on what's needed for trans mount, drive shaft mods, e-brake changes, or anything else we need to be aware of? Any help or suggestions would be appreciated. Thanks. Scott __________________ 1963 C10 swb fleetside 1966 GMC G1000 Handi-bus (future project) 1955 Chevy 2 dr. wagon

07-22-2008, 02:56 PM	#2
Fastrucken Junior Member Join Date: May 2006 Location: Peninsula, Oh Posts: 197	Re: What's involved switching from a manual to auto You'll have to cut the 3 speed crossmember out. It will not be needed and will be in the way. you'll need a transmission crossmember. One from 73-87 will work just fine. Your drive shaft modified to fit the new transmission. in my old LWB I got rid of the 2 piece and went with a single drive shaft. I don't think that you'll have to mess with the parking brake as the 66 didnt use the trans crossmember like the earlier years did. Although you already have the th350 if its going to be a daily driver consider using a 700r4. It will be more enjoyable to drive and will save quite a bit in gas money Graham __________________ A good friend will come bail you out of jail, but a true friend will be sitting next to you saying, "That was ****ing awesome."

07-22-2008, 03:16 PM	#3
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Re: What's involved switching from a manual to auto Thanks Graham. Can u tell me if a auto xmember from a 72 C10 would work as well? __________________ 1963 C10 swb fleetside 1966 GMC G1000 Handi-bus (future project) 1955 Chevy 2 dr. wagon

11-02-2010, 09:54 PM	#5
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,527	Re: What's involved switching from a manual to auto This is an older thread, but I like how it goes into what's involved. Thanks __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

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