School me on overdrive transmissions for a RB
#1219163
04/20/12 05:54 PM
04/20/12 05:54 PM
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Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
OP
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OP
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Delray beach, Florida
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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.
machine shop owner and engine builder
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Re: School me on overdrive transmissions for a RB
[Re: AndyF]
#1219169
04/20/12 08:58 PM
04/20/12 08:58 PM
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Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
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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?
machine shop owner and engine builder
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Re: School me on overdrive transmissions for a RB
[Re: Performance Only]
#1219170
04/20/12 11:56 PM
04/20/12 11:56 PM
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Joined: Jan 2003
Posts: 31,050 Oregon
AndyF
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I Win
Joined: Jan 2003
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Oregon
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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.
Last edited by AndyF; 04/21/12 12:02 AM.
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Re: School me on overdrive transmissions for a RB
[Re: Performance Only]
#1219172
04/21/12 01:58 AM
04/21/12 01:58 AM
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Joined: May 2005
Posts: 6,446 NJ-USA
HPMike
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Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
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?
4l80E will need the floor cut.
GV is a good option here. Why is it out of the picture(just curious)? I do a lot of GV conversions and currently finishing one up on a 70 Charger R/T. Everyone who I have installed one of these units on has been VERY happy. They are trouble free, and can handle a fair amount of power. B/E cars require very little floor massaging(no cutting), but admittedly I have never done one on a convert so I cant attest to the fitment there.
Otherwise, your options are very limited if no floor cutting is mandatory. What I gave done on some that the floor needed cutting, I simply cut a clean section out and fabbed another replacement floor piece that raises the roof on the floorboards, so to speak. The piece is cut cleany out and can easily be buttwelded back in and with a bit of bodywork can be made to look 100% perfect when done.
Let me know if you want any photos of the installation in the Charger. Car is just about ready to get off the lift.
MB
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Re: School me on overdrive transmissions for a RB
[Re: Performance Only]
#1219173
04/21/12 12:33 PM
04/21/12 12:33 PM
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Joined: Sep 2003
Posts: 1,688 Marlboro, NY, USA
Rick_Ehrenberg
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As mentioned, Keisler's 4L60 will basically bolt in, but 600 ft/lbs is max-max.
6-speed version of 4L80 (TCI 6X) is awesome beyond belief, but a lot of hacking required; as Andy mentioned, I wrote it all up in macro detail.
Both of these keep propshaft / u-joint angles better than stock, and there's no unsupported cantilevered housing dangling out there as with GV. And the programability, converter lock, etc., places them in a class alone.
Rick
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Re: School me on overdrive transmissions for a RB
[Re: Rick_Ehrenberg]
#1219174
04/21/12 11:55 PM
04/21/12 11:55 PM
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Joined: Sep 2007
Posts: 576 Escondido, CA
kick_the_reverb
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Escondido, CA
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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
"Hey mister, something's wrong with your car, it idles roughly" - number one comment I got in Israel when daily driving a 70 Barracuda with a lopey cam.
Currently working on - 1966 Dodge A100 van 318/auto Finally - disc brakes on the front. In the plans - rear disc brakes, B&M 250 blower
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Re: School me on overdrive transmissions for a RB
[Re: savoy64]
#1219179
04/22/12 10:58 AM
04/22/12 10:58 AM
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Joined: Nov 2003
Posts: 2,944 GA
roadrunninMark
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You can usa a 518, no floor cutting. Check here at cuda-challnger: http://www.cuda-challenger.com/cc/index.php?topic=23678.0In 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.
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