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Author
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Topic: can I use the V6 -RAD4-tranny on the V8?
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Roar
Journeyman Posts: 6
From: Arroyo Grande,Ca. usa
Registered: Mar 2003
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posted 03-14-2003 12:34 AM
   
I have a V6 4 speed and want to install a V8. Can I use a different bellhousing and the same tranny?
The Rad 4 is an all alloy 4 speed.
Thanks
Roar------------------
Ignorance can be fixed, stupidity is FOREVER!
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IIGood
Moderator Posts: 3510
From: Arnold, MD, USA
Registered: Jun 99
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posted 03-14-2003 03:37 PM
I don't think so. A fella on the II list I'm on had that problem, I believe. Has a Cobra with a V8, and when his original tranny went, the shop put a tranny from a V6 in and it wouldn't quite work. I'll get in touch with him to verify this though.------------------
Frank S.----MCA Member 40390
'99 Mustang coupe
'77 Ghia--"II Good"
'76 Cobra--project
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Percy Hazel
Journeyman Posts: 58
From: Bellingham, WA, USA
Registered: Jul 2000
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posted 03-15-2003 01:26 AM
The Mustang II 4spd, [V8 model] wasn't terribly strong to begin with but the V8 gears are stronger than the V6 or 4cyl.
I think the cases were the same but even if it fits I don't think that I'd use it.
Jump on it a couple of times and I believe you will have a puddle of oil and parts all over.
My 2 cents.
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NoBS
Journeyman Posts: 34
From:
Registered: Oct 2002
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posted 03-15-2003 04:42 PM
What Percy said. Also, the ratios are different, first runs out quite quickly, and there is a large jump between 3rd and 4th.
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Maxwell_fax
Gearhead Posts: 221
From: Port Royal, PA, USA
Registered: Nov 2000
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posted 03-17-2003 07:13 AM
I grenaded 2 with a fairly stock 2.8
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Roar
Journeyman Posts: 6
From: Arroyo Grande,Ca. usa
Registered: Mar 2003
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posted 03-18-2003 01:06 AM
There are seemingly several trannys that came with the Ford V6! I have an alloy 5 speed with a bottom cover and wide ratios, a 5 speed type 9 with an alloy case (wern't most iron?)_ the RAD-4 4 speed all alloy top cover type and the cast iron case, alloy tail shaft and top cover type! It's wierd that good ol mass production FORD would make all these different boxes when they could have tailored any one of them to do the job of any! But this is the company that simultaniously made the EnFo Zephyr and the Falcon with similar specs.------------------
Ignorance can be fixed, stupidity is FOREVER!
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Pepse
Journeyman Posts: 12
From: Chetek, WI, US
Registered: Dec 2002
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posted 03-24-2003 05:02 AM
Seriously if you're OK with external shift rods try using one from a Ford Capri MK1 or MK2 with the V-6 ('73-'78). Also, if you chance upon a Ford Capri get the rearend and have it balanced to your leafs. It is said to withstand the torque of the 351W 4bbl, etc., etc. I had 12 years of slamming around 6 diff Capris and never had major probs with the drivetrain. 5 of the 6 were V-6 4spds. Rear ratio is 3.22:1, V-6 and 3.44:1 4cyl. 4cyl rear just as strong as V-6.Later. Pepse.
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MooseII78
Journeyman Posts: 47
From: LA
Registered: Nov 2001
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posted 04-02-2003 12:47 PM
It will work but tis weaker than the already weak v8 rad. i got a v8 rad i'll sell ya ;-)
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Dano78
Journeyman Posts: 15
From: Vancouver, WA
Registered: Jul 2000
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posted 04-14-2003 07:02 AM
The pilot bearing area on the input shafts are waayyy different anyways. The V8 trans is larger dia and stubby wheras the v6's is longer and smaller in dia. than a V8.
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lil78stang
Journeyman Posts: 1
From: owensboro, ky, USA
Registered: Nov 2002
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posted 12-02-2003 05:12 PM
I have a 78 II that has the factory v8 RAD trannie in it. I've been drag racing it for about 5 years now, and the trannie has never let me down. Even running 10" Mickey T's, it holds together.The 8" rear on the other hand is another story. I've gone through several of those.
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MooseII78
Journeyman Posts: 47
From: LA
Registered: Nov 2001
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posted 12-11-2003 04:13 PM
Lil78 congrats cause your the only one ever to have one hold. They are weak. If you have poor traction it may hold for awhile. What kinda times you turning?
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thunderchicken
Journeyman Posts: 24
From: shepherd tx usa
Registered: Dec 2003
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posted 12-12-2003 10:34 AM
i want to put a manual in my 91 tbird 5.0 but all i have is a v8 rad. if it holds up to drag slicks and racing like that it should hold up on the street. but i don't wanna chance it i hate getting under low cars and messing with the trannies.ithe yards around here have plenty of cougars and t birds but i think they are auto.
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MooseII78
Journeyman Posts: 47
From: LA
Registered: Nov 2001
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posted 12-12-2003 10:45 AM
The RAD is weak it will not hold up if you put slicks on it.
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thunderchicken
Journeyman Posts: 24
From: shepherd tx usa
Registered: Dec 2003
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posted 12-12-2003 01:19 PM
lil78 said he had micky t's
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MooseII78
Journeyman Posts: 47
From: LA
Registered: Nov 2001
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posted 12-12-2003 01:37 PM
Im not arbitrarily throwing this out. Ive been there done that several times. If you choose to learn the hard way by all means go for it. BTW i never had a problem roasting mickey Ts
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thunderchicken
Journeyman Posts: 24
From: shepherd tx usa
Registered: Dec 2003
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posted 12-12-2003 09:24 PM
i am not going to use it
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