1972 Pontiac LeMans PLEASE HELP!

[Albertx22]

Hey everyone, I'm new to this forum, but I'd like to start by saying my name is Albert, I own a 1972 Pontiac LeMans, Luxury Edition. It has a 400 with a turbo 400 trans on it. I've just recently rebuilt the engine, and put a mild cam, and upgraded rocker arms in it, new oil pump, and totally cleaned everything else. I also have the MSD Atomic EFI setup on it, which for the most part is nice, but I'm having issues with it, which I was hoping to get answered or directed somewhere that I could find the answer to my problems.

What I would really like to know is.. I want to swap out the trans for a newer one with overdrive, I don't know what trans of what cars would match up to my engine, and whether I'd have to alter the driveshaft or not also...

PLEASE HELP!!

- Albert

 

[melsg5]

Look into the 200R4 or 700R4. You will need an adaptor to mate to a Pontiac block. Depending on what cam you put in you may have to consider stall speeds. This site has lots of information.

http://www.tciauto.com/

 

[Zimgxp]

The crossmember will need to be moved back a little and probably a new driveshaft. The 200 and 700 are pretty much the same. But the 700 has a lower first gear. It is considered the large car tranny.

 

[Icefan71]

The 2004r will bolt right up to your motor. What rear end gear do you have now and why do you want to swap your transmission?

______________________________

 

[92 Sunbird LE]

I also have the MSD Atomic EFI setup on it, which for the most part is nice, but I'm having issues with it, which I was hoping to get answered or directed somewhere that I could find the answer to my problems.

PLEASE HELP!!

- Albert

Others are having problems with the MSD Atomic EFI, a quick search pulled up quite a few different ones........

http://search.aol.com/aol/search?q=Atomic EFI problems&s_it=keyword_rollover&ie=UTF-8&VR=3430

Doug in P.R.

 

[Jzenzen]

I got a 700r4 from Bowtie Overdrives in CA. They have a bell housing option where they with cut off the existing chevy pattern and bolt a universal bell housing (which is stronger and SFI approved) that will fit BOP with no spacers, shims, etc. It is an additional $500 bucks, but worth it for piece of mind, plus a lower 1st gear. I have a 455 with 3.55 gears in my LeMans and in my opinion the 700r4 has longer gears which better suit a torquier engine. Please post more about the MSD Atomic EFI. I am curious as to switching over for the easy of driving.