which OD trans would be best behind a 500" RB in a E-body, street driven only car. the current combo is 600 HP.
gearvendors is out, so please don't go there.

Passon gearset in an 833 case, until he is in production of his 5 speed its the next best thing because you dont have to cut/chop anything. Tim

I'm in the same boat... already revamping the cam selection and distributor curving to match my 505 with an overdrive 5 speed. Renovation started last week... next is the wait for the trans... It will be worth it! Patiently waiting Jamie...

Auto or manual

4L80E with an Ultrabell. It's a very stout transmission and well-known in the HP aftermarket. Standalone controllers have been on the market for years.

R.

I covered all the known options in my B-body book. Bottom line is that it depends if you're willing to cut the floor or not. If you're willing to cut the floor and the tranny crossmember then the options go way up.

this needs to be an auto trans. i'm not willing to cut the floor up on a 70 E body convertible. changing the crossmember is no big deal though.
does the 4L80 fit without cutting the floor?

I don't think so. I've seen pictures of a handful of swaps and in every case the person needed to cut the floor to remove the tranny crossmember. That crossmember is a big deal in a Mopar since that is where the torsion bar anchors are. Some guys go with a coil over suspension to get rid of the torsion bars, other guys build a new crossmember.

I did see some posts by a guy who said that he did it without cutting the floor, but I think what he did was lower the engine and/or put the tranny in at a weird angle.

Eberg just did this swap in Mopar Action. Check out the pictures in the back issues. They cut the floor and did a fair amount of fab work.

The Keisler OD auto is supposed to fit without any cutting. I'm sure there are some guys on the board with that kit installed. Maybe someone will weigh in with some feedback.

Then really your only option is a GM 700R4. The Keisler auto is based on the GM 4l60-e, which is the electronic version of the 700R4. It will take a well built 700R4/4l60-e to take 600hp but it can be done.

Dan,
This is something less popular on Mopars, but maybe try talking to these two 200R4 specialists:

Lonnie Diers at Extreme Automatics

Or

Dave Husek at TURBO BUICK PERFORMANCE

The 200R4 has a lot of following in Turbo Buick circles, and can be built to take a lot. Built right it can be much stronger than any 700R4 and its derivatives (4L60E).

It's a very compact transmission. If there's an adapter plate for BBM to GM transmissions, then I am pretty sure it can be done with no floor hacking.

It would probably be much cheaper than Keisler.

Good luck,
Ran

The 700R4 guys say theirs is better than the 200-4R. The 200-4R guys say theirs is better than the 700R4. What I've read makes it sound like they both start crapping out at around the same hp levels.

1wildRT put a 5/18 in an ebody vert without cutting the floor , there are pictures somewhere. the only real issue is controlling od and possibly lockup , can be done with pressure and vac switch with the mechanical gov version , but the electronic gov trans is a little better to deal with.

i don't think there is a stand alone controller for one yet , if there is it would be cheaper to buy a Z06 corvette ..

before you get into an ultra bell to put a chev tranny in----consider the 618---it is quite strong and lives behind a cummins or V10 motor and they can be built up for those 1000+ hp trucks--before anyone starts whining about the build cost--the chev units will have to be built too-the early ones are hydraulic valve body and simple to work with---bob

You can usa a 518, no floor cutting. Check here at cuda-challnger: http://www.cuda-challenger.com/cc/index.php?topic=23678.0

In the Moparts archive is a member you put it behind a big block with the ultra bell, don't have a link off hand.

For the trans mount, US Car Tool told me they make it so you can get it from them.

Member Whoosewhatzit, (something like that) was thinking of making a electronic controller for the 96 and up 518s, otherwise you need a 94-95 (best for lock up convertor), or real earlier non lockup (handles more HP, but will need a few mods). You then need a few more items like someone else said for the OD and such.

Yep. I take a built 200-4R over a built 727 with a GV unit any day of the week. I think some here would be shocked at the amount of HP the 200 can take when built properly. At a much reduced weight to boot. Win, win.

Not many automatic options unless you cut the torsen bar crossmember out of the trans tunnel?
Keisler claims no cutting required for their kit, so it might work? Their stage 3 kit is "rated" at 650 lb-ft.