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-   -   Fabricating a tranny cross member.... (http://www.hotrodders.com/forum/fabricating-tranny-cross-member-228798.html)

31ROC 01-24-2013 06:41 PM

Fabricating a tranny cross member....
 
So, as I approach getting this clutch set, bell, and new Muncie ready to install, I'm going to have to make a crossmember to fit...(31 Model A frame), the existing crossmember which held the 700R4 in place wont work...so I'm looking for pictures/ideas for a new one. Would like to bolt it to the frame for easy access of tranny removal if needed....can I bolt a square tube member to the BOTTOM of the frame rails? Or would that not be strong? (old cross member was bolted, but to the inside sides of the rails....
Thanks in advance....

NEW INTERIORS 01-24-2013 07:02 PM

4 Attachment(s)
This isn't on a Model a..But a few I have made that might give you some ideas..If your going to bolt through a tubing you will need to weld in some little pipes spacer's for the bolts to go through,, If you just bolt through the tubing,, They will just crush the tubing and will keep getting loose over time..

killeratrod 01-25-2013 02:24 AM

not to hijack the thread. But NEW INTERIORS You do some killer work, Those beads look as if a robot did them Perfect.

31ROC 01-25-2013 03:24 AM

Quote:

Originally Posted by NEW INTERIORS (Post 1638461)
This isn't on a Model a..But a few I have made that might give you some ideas..If your going to bolt through a tubing you will need to weld in some little pipes spacer's for the bolts to go through,, If you just bolt through the tubing,, They will just crush the tubing and will keep getting loose over time..

those look great, but they all bolt to inside of frame rails, is it a "no-no" to bolt to the bottom of the rails?

killeratrod 01-25-2013 03:40 AM

not one is bolted to the bottom rail.

killeratrod 01-25-2013 03:50 AM

here you are ready to install a new clutch & Trans & make your own cross member, But in one of your other posts you need to know how to install a simple oil pan & gasket. What gives?

31ROC 01-25-2013 04:10 AM

Quote:

Originally Posted by killeratrod (Post 1638547)
here you are ready to install a new clutch & Trans & make your own cross member, But in one of your other posts you need to know how to install a simple oil pan & gasket. What gives?

thats incorrect....I asked about installing a chrome pan, and wanted to know best gasket & sealant to use....its been about 25 years since I've worked on my cars, just need to get the dust out....the cross memeber will b no sweat to make, as I work for a metal fab shop, but wnated to see if anyone attached them to bottom of rails, as I am cramped for space on insides.....

NEW INTERIORS 01-25-2013 07:06 AM

Quote:

Originally Posted by killeratrod (Post 1638537)
not to hijack the thread. But NEW INTERIORS You do some killer work, Those beads look as if a robot did them Perfect.

Thanks... Killer ... I was that Robot for many years...:thumbup:

NEW INTERIORS 01-25-2013 07:11 AM

Quote:

Originally Posted by 31ROC (Post 1638539)
those look great, but they all bolt to inside of frame rails, is it a "no-no" to bolt to the bottom of the rails?

Many was bolted to that bottom lip before.. Just make sure you bottom lip is not rusted out any where's.. You can even weld in a thicker plate on the top side of the bottom lip if that will make you feel better... You can also drill and tap that plate before you weld it in,,, Then you won't need any nut's behind it..

NEW INTERIORS 01-25-2013 07:16 AM

Look at the first picture,, Think of that angle iron being the bottom lip in your car.. You can do something like that one...That car had a big block in it with a lot of HP.. didn't break anything but the tires..:D

If you do it this way,, Try to make it sit on the top of the bottom lip.. Then your bolt's are just holding it in place..

http://www.hotrodders.com/forum/atta...p;d=1359079333

31ROC 01-25-2013 10:33 AM

Quote:

Originally Posted by NEW INTERIORS (Post 1638586)
Many was bolted to that bottom lip before.. Just make sure you bottom lip is not rusted out any where's.. You can even weld in a thicker plate on the top side of the bottom lip if that will make you feel better... You can also drill and tap that plate before you weld it in,,, Then you won't need any nut's behind it..

LOL...frame is new, better not be any rust!
Thanks for the input!

NEW INTERIORS 01-25-2013 10:43 AM

Quote:

Originally Posted by 31ROC (Post 1638653)
LOL...frame is new, better not be any rust!
Thanks for the input!

LOL... That's what's bad about the web,, You have no idea what someone is working with....LOL.. You should be OK then..:thumbup:

Trophyman 02-06-2013 11:15 AM

Quote:

Originally Posted by NEW INTERIORS (Post 1638657)
LOL... That's what's bad about the web,, You have no idea what someone is working with....LOL.. You should be OK then..:thumbup:

Timely thread since I'm looking at building a trans mount right now. Again, don't want to hijack this thread but what size tubbing would be sufficient giving the car is a driver and won't be thrashed. SBC/4L80.

31ROC 02-06-2013 06:06 PM

I have no idea, (I think you are refering to "tubing"?) I have not started mine yet....but the crossmember I took off was about 1 1/4 tubing....if you look for crossmembers at the big website suppliers, ie: Speedwaymotors.com, I believe they'll indicate what size they are. Should give you a good idea. I personaly am planning to make this new one out of square tubing....


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