B-body auto to 4spd conversion.

Beeaurell · Jun 17, 2012

Has anyone converted a automatic to 4 speed? What I'm really after is a few pics of a original 4 speed as reference on where and how much to cut for the hump. Of course that would be a picture from underneath the car. 1970 Superbee is the vehicle I'm working on.

Lowhound · Jun 17, 2012

I changed mine to 70 Bee over to a 4speed. What I did was I ordered a 4 speed hump 1st. I got mine from Year One but I think its actually an AMD piece.The way it lays on the main pan is almost perfect in the way all the contours fit each other. Then I traced around the outside edge of the 4 speed hump. Then I measured 3/4 inch to the inside of line I had traced & that was my actual cut line. I did this because I was afraid of cutting the whole to big. I still have a small lip you can see from underneath,but afterward I saw an original 4speed floor & its identical as I had done. HINT: measure twice cut once.

Lowhound · Jun 17, 2012

I will try & take a pic from underneath. I have the engine & trans out of the car rite now so it should show good. But my mom in ICU at the hospital at the moment so if I get the chance Il try & take a couple pics for you.

Beeaurell · Jun 17, 2012

Thank you Low Hound. That's what I was thinking of doing. I just didn't want to run into a issue of not cutting enough out the floor. I have the hump and it does fit nicely over all contours like you said. Hope all goes well with your mom. God Bless.

ws27 · Jun 17, 2012

Putting the 4 speed hump in was a very crude procedure at the factory. As you now know, the hump locates itself where it is supposed to go. I'm pretty sure they hend welded it in first, then cut the floor out from the bottom, that way you can use the hump as a guide when cutting.

Beeaurell · Jun 18, 2012

Thanks for all the helpful info guys. Very much appreciated.

adamst56 · Jun 26, 2012

I see you already have the hump and maybe everything else. If not you should check out the entire kit available from Brewers Performance. You will get a nicely prepared tranny and absolutely eveything you need.
http://www.brewersperformance.com/products.asp?id=238

adamst56 · Jun 26, 2012

one more before paint that might help show install better

B-body auto to 4spd conversion.

Beeaurell

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Lowhound

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Lowhound

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Beeaurell

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ws27

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Beeaurell

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adamst56

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adamst56

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