V6/V8 trans interchangability?
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From: Hinesville, GA USA
Car: '86 IROC-Z/'94 Z28
Engine: 350 LT1/382 LT1
Transmission: 4L60-E/T-56
Axle/Gears: 3.45/3.42 (soon 4.10)
V6/V8 trans interchangability?
The question is can it happen. I never looked under a V6 thirdgen, but I've heard conflicting stories about if the trans under them fit V8 engines. I have a friend who want's my 700-R4, which is 27 spline, but built. He has a V6 with an almost-dead tranny. Will it work? Too dark outside to go out and look. Just want to double-check. Also, the car's and '89...what worries should I have regarding TCC lockup(connector)? Thanks
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From: Columbia MO
Car: 1983 Z28
Engine: 350
Transmission: WCT5
Correct me if I'm wrong someone, but isn't the bellhousing bolt pattern totally different since the V8 is a 90 degree engine and the V6 is a 60 degree engine?
HTH
Clem
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Clem
SCCA TransAm Series Race Mechanic/CrewChief
-------------
1983 Z28 with LG4, 5 speed, and (unfortunately) T-tops
1983 Z28, NO T-tops, (unfortunately) Auto Transmission---FOR SALE---
Looking for a V8, preferably 4 or 5 speed Camaro with NO T-tops (wanna trade?)
HTH
Clem
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Clem
SCCA TransAm Series Race Mechanic/CrewChief
-------------
1983 Z28 with LG4, 5 speed, and (unfortunately) T-tops

1983 Z28, NO T-tops, (unfortunately) Auto Transmission---FOR SALE---
Looking for a V8, preferably 4 or 5 speed Camaro with NO T-tops (wanna trade?)
Supreme Member
Joined: Nov 1999
Posts: 2,860
Likes: 3
From: NE
Car: 82 camaro SC
Engine: 350
Transmission: 700r4
If it's a 4.3L v6, it will work. Otherwise the bolt pattern is different.
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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro
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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro
Supreme Member
Joined: Jan 2001
Posts: 1,411
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From: Rock Hill, SC
Car: 1999 Pontiac T/A Firehawk
Engine: ***'s Engine
Transmission: T56
If the v6 in question is anything but a 4.3L, the answer is:
If it's an auto, no, it will not work. Period.
If it's a stick, you can build a bastardized hybrid with a v8 bellhousing and a v6 tranny, but I don't see why you'd want to, because the spline count on the input shaft is different necessitating a custom clutch disc, or using the puny v6 disc.
4.3L V6 shares the same bellhousing pattern with the SBC and will work fine.
If it's an auto, no, it will not work. Period.
If it's a stick, you can build a bastardized hybrid with a v8 bellhousing and a v6 tranny, but I don't see why you'd want to, because the spline count on the input shaft is different necessitating a custom clutch disc, or using the puny v6 disc.
4.3L V6 shares the same bellhousing pattern with the SBC and will work fine.
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From: Hinesville, GA USA
Car: '86 IROC-Z/'94 Z28
Engine: 350 LT1/382 LT1
Transmission: 4L60-E/T-56
Axle/Gears: 3.45/3.42 (soon 4.10)
Yep. Found out Saturday. Tranny looks the same except for the bellhousing. Thought they were all the same...damn! Oh well, maybe he'd like a motor, too
. Thanks, guys.
. Thanks, guys. Supreme Member

Joined: Jan 2001
Posts: 1,978
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From: PA
Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
Actually the 4.3 is internally weaker, so if you plan on beating it.....
It's like a case of a v6 5 speed bolting to a v8 with the v8 bellhousing.... Who would do this just to end up doing it over.
It's like a case of a v6 5 speed bolting to a v8 with the v8 bellhousing.... Who would do this just to end up doing it over.
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