difference between 4.3 700r4 and v8 700r4?

Transmission, drivershaft, and rearend.

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difference between 4.3 700r4 and v8 700r4?

Postby Bigiron » Tue Jul 19, 2005 1:26 pm

I am starting to hear that you shouldn't use a 4.3 700r4 behind a v8 why is that? I used the stock v6 trans behind mine and it worked fine considering it has 200k on it when I bought it and I have beat on it pretty good. I have another 4.3 trans that I am thinking about getting rebuilt with a rebuild and shift kit from northern and was wondering should I look for another tranny. The truck is mainly street driiven and probaly will never have over 350 hp with a 700r4
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Postby chevy350 » Tue Jul 19, 2005 5:08 pm

Tear both of them apart and let me know also, I don't think there is a difference.
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Postby va4cqd » Tue Jul 19, 2005 8:08 pm

the V8 version has more clutch packs
2011 GMC Canyon 4x4 I5
gone : 1992 S10 4x4 4.3L TBI, 5 speed
Project 1952 Chevy 3600 truck tbi 350/5 speed, gm 8.5" 3.90:1 IFS from 83 C10
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Postby gootch » Tue Jul 19, 2005 10:31 pm

va4cqd wrote:the V8 version has more clutch packs

yep
94 S10 4 bangin' 5 speed gettin all the goods from the 82.
82 GMC S15 , 350 w/cam, ported 1.94/1.50's, K&N with extreme flow lid,accel ignition, true duals with flowmaster 40's,corvette radiator...New th350 trans w/shift kit, energy suspensions mount, and V-matic shifter 8) Wrote off thanks to a ricer :cry:
http://www.cardomain.com/memberpage/793648/1
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Postby Kramer » Tue Jul 19, 2005 10:35 pm

mine had as many as a v8 trans
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Postby Bigiron » Wed Jul 20, 2005 5:55 am

I can see where that would make a difference in high horsepower applications but in a mild 350 shouldn't matter to much
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Postby chevy350 » Wed Jul 20, 2005 5:03 pm

Kramer says his had just as many clutches as a V8 so I would listen to that :wink: the input and output shafts are identical I can tell ya that much. The valve body seems to be the same but maybe there is a difference, I still doubt it.
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Postby Bigiron » Wed Jul 20, 2005 8:01 pm

I talked to a guy that is going to build mine and he builds race transmission and he said it wasn't a difference juat a matter of who builds it and if you put the right stuff in it
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Postby chevy350 » Sun Aug 14, 2005 4:46 pm

I had to ask a tech at TCI a question today, so in the email I added the question if there was a difference in the 4.3 and V8 700r so we will have a positive answer on this hopefully.
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Postby 91slammins15 » Sun Aug 14, 2005 6:44 pm

Mine had as many as a V8 tranny according to the guy that rebuilt mine there is no difference.He said " the case is only one size and you can only fit as many clutch paks as what came out of it" Now with that said the 200R4 does have less clutch paks.
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Postby chevy350 » Tue Aug 16, 2005 12:47 pm

He didn't get very technical but this is what he said...

my question
> I swapped a 350 into my 89 S10 that had a 4.3 and I am
> using the transmission that was behind the 4.3, it's a
> 700r.
>
> I want to know if there is any difference between the
> V8 and V6 700r, and if so, what is the difference?
>
> Also does the lockup converter have to be operational?
> I have heard that it will overheat the transmission if
> it doesn't lockup is this true?

his answer
The later model 700R's as yours is are the same from a V6 to V8 and yes
you
need the lock up working as this aids in the lubrication to the rear
planetaries and will burn them up with out it.. We offer a kit # 376600
that
allows the lock up to work in any year vehicle. Thanks
Will
TCI Automotive
151 Industrial Dr
Ashland MS 38603
662-224-8972
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