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Re: Finally a BB automatic overdrive tranny!
[Re: mopar346]
#1702065
11/24/14 02:54 AM
11/24/14 02:54 AM
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Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
Frankenduster,
And yea, 10 might be a little hopeful on an increase from a lock up. I wonder what improvement you would have seen if you stayed with the 3.23s?
That takes the discussion in another direction. I see that some engines may not get better mileage simply because they are revving less. This can be the case with aggressive camshafts where the engine is less efficient at lower RPMs. A stock engine with mild camshaft timing ? Sure.
If I decide to go with an overdrive in the future, I may choose to build a 518. My car is a keeper so any changes I make would not be skewed by thoughts of resale value.
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Re: Finally a BB automatic overdrive tranny!
[Re: BDW]
#1702067
11/24/14 02:30 PM
11/24/14 02:30 PM
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Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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Quote:
No cutting for E or B bodies, just finished my install, amazing difference.
Good read here, get the LU
http://www.cuda-challenger.com/cc/index.php?topic=84774.msg847873#msg847873
In 71-74 b-bodies, early ones the crossmember is located a few inches forward and it's makes a nite and day difference... the center of the torsion bar crossmember needs cut out basically to the floor pan.
When I went to do the swap, I missed that part, thinking it'd be easy like going in an e-body from readings links on cc.com 
68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: Finally a BB automatic overdrive tranny!
[Re: Silver70]
#1702068
11/26/14 01:38 AM
11/26/14 01:38 AM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Quote:
Quote:
No cutting for E or B bodies, just finished my install, amazing difference.
Good read here, get the LU
http://www.cuda-challenger.com/cc/index.php?topic=84774.msg847873#msg847873
In 71-74 b-bodies, early ones the crossmember is located a few inches forward and it's makes a nite and day difference... the center of the torsion bar crossmember needs cut out basically to the floor pan.
When I went to do the swap, I missed that part, thinking it'd be easy like going in an e-body from readings links on cc.com
This is good information, my thoughts are for my 71 BB Charger 500. I'll read the CC thread but if I understand ya'll correctly it will work without cutting.
The cores they request are actually 2 cores, a 518 and a BB7 27, they graft the 727 bell onto the 518. Everything else is 518, some wiring required for the electronics.
Careful, your character's showing!
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Re: Finally a BB automatic overdrive tranny!
[Re: Kern Dog]
#1702070
11/26/14 12:19 PM
11/26/14 12:19 PM
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Joined: Jan 2003
Posts: 12,078
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,078
Benton, IL.
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I talked to PTC about converters for this swap. They indicated that there were fewer converter possibilities with the lock up. May not matter to your particular application, but it might be a good idea to check BEFORE pulling the trigger on a lock up tranny if you were going that way.
Master, again and still
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Re: Finally a BB automatic overdrive tranny!
[Re: Kern Dog]
#1702073
11/26/14 11:10 PM
11/26/14 11:10 PM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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I like the idea of keeping it all Chrysler but the 200 would be cheaper to build that's for sure, maybe not depending on the power it will hold. I have considered swapping it to a 833 O/D but not really wanting a standard in this one.
Careful, your character's showing!
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Re: Finally a BB automatic overdrive tranny!
[Re: GY3]
#1702077
11/28/14 01:16 AM
11/28/14 01:16 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Guys with modded 6 cylinder turbo Buicks have problems getting the 200 to live so the torque of a BB Mopar is only going to make it worse! Once a friend made enough power in his T-type to run 10.80, he couldn't get the trans. to stay together.
Guys have been saying that for years about the 518's too. How many of us are running 10 second street cars?
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Re: Finally a BB automatic overdrive tranny!
[Re: gdonovan]
#1702079
11/28/14 04:44 PM
11/28/14 04:44 PM
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Joined: Jan 2010
Posts: 667
Los Osos, Ca
CKessel
mopar
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mopar
Joined: Jan 2010
Posts: 667
Los Osos, Ca
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The 518/618 units get run behind heavily modified truck that weigh upwards of 8k lbs putting out over 600hp and 1500ftlbs tq. The trans does need to be upgraded of course to take it. There are specialty converters running up to 4 disc lock up clutches in them to put up with this abuse. Of course they are expensive too. Another way to go would be to get a donor trans from a 93 back diesel or early production v8 from like 89. They did not run a lock up converter.
Carl Kessel
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Re: Finally a BB automatic overdrive tranny!
[Re: gdonovan]
#1702080
11/28/14 07:55 PM
11/28/14 07:55 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Quote:
Guys have been saying that for years about the 518's too. How many of us are running 10 second street cars?
Which I never understood considering its just a 727 with an overdrive slapped on. One which will take the torque of a Cummings diesel.
And anyone who's owned one knows the ones even on stock unmodified Cummins are not known for their longevity. Not saying the 518s are bad, but they're not the holy grail either.
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Re: Finally a BB automatic overdrive tranny!
[Re: DaytonaTurbo]
#1702081
11/28/14 10:51 PM
11/28/14 10:51 PM
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Joined: Jan 2003
Posts: 12,078
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,078
Benton, IL.
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I don't know of a more durable tranny than a well built 727 for most of what we all do. So, as far as the first 3 gears, a 518 would be as tough as any comparably built 727.
Now I don't know the limits of a lock-up converter or the OD section, but do those really need to hold all of our power in normal driving?
I plan to use a non lock-up 518 in the Cuda next year. The main body will be built just like the 727 in there now which has proven to be nearly indestructible. The OD will be beefed up, but I do not plan to ask it to hold all of power the engine is capable of making.
Master, again and still
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