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-   -   Changing to an auto from manual in 57 Chev (http://www.hotrodders.com/forum/changing-auto-manual-57-chev-8643.html)

pikalpha 12-12-2001 07:44 PM

Changing to an auto from manual in 57 Chev
 
I am changing the original 3 speed trans to an automatic in a 57 Chevy. The car has the original gear shift on the column and has about a 74 Chev 350 engine on the original 57 Chev pin motor mounts. I will be changing out the column for the auto trans and Danchuck has provided me with all the parts such as mounting brackets and crossmember that I think I will need. I also have spoken with several people on and off line about what I will need. What I don't know is where to begin. This is my first time for doing something like this and I want to get it right the first time. I need to know things such as are there any holes in the frame where the crossmember bolts on or will I have to drill? The trans is a 350 turbo. I know I will need a flexplate but what kind? What should I torque the bolts at????? How should the starter be spaced from the flexplate and when do I know its just right? I am pretty sure I have all the parts needed, I just need some direction in installing the new trans and what I should expect. I appreciate any help. Thanks!

Phat 12-13-2001 04:24 AM

First off its a little more invloved. You need to throw away the stock motor mounts.(as they are to far foward a let those turbo350 crack) The motor needs to be mounted on the side (another kit) then with the side mounts you stock ex manifolds(if your running them get the axe. Next the exh system probably will need to be changed out also(dont buy a kit they dont fit,have a custom shop in your area do it for you)Flex plate is just a stock item you could get from chevy or summit or jegs .When you buy the starter there should be a paper in there to show you how to shim the stater. You have a very big job ahead of you. Dont forget the drive shaft may not work as you may move the engine with the new mounts.Good luck and remember most so called kits need a little work(they dont just bolt in) Oh allmost forgot,the first thing you do is remove everything.Engine and trans get to come out. I dont understand about your column ???what did they sell you???

[ December 13, 2001: Message edited by: Phat ]</p>

pikalpha 12-13-2001 03:48 PM

I have a 57 chev auto column was told the shift tude and linkage would not match up to the trans. No big deal. I was told the covers or painted surfaces on the old column would pretty much slide off and could be put back on the other without much effort. Thanks for all the advice and help. It does sound involved. I know some of these cars cars came with auto trans. Were the engine mounts different on the cars with auto trans? The engine in this car is a late model engine about 1974. Would this engine have been originally set up with the side motor mounts?

Phat 12-14-2001 05:30 AM

Yes the tubes will slide over (i think the seat has to be back or the box unbolted but it can be done) The original big cast iron auto in the 57 mounted to the side of the trans by the starter.The new trans mounts by the tail shaft.If you use the stock front mount for the motor it will have NO support in the middle and the trans housings crack(many times).So what you will be looking for is a side motor mount kit(i dont know who to tell you has a good one as i make my own stuff in our shop) I do know if you want to go to a HEI dist you will want to mount the motor ahead of stock about 1 inch or so.Hope this helps a little ,sorry i cant help with kits as i make all are stuff. Oh and yes the 74 motor will have the place for side mounts ,i think that started in 58 maybe????

[ December 14, 2001: Message edited by: Phat ]</p>


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