converting V6 T5 to WC V8 T5?
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converting V6 T5 to WC V8 T5?
i have a vague idea of what's different, i'm just trying to figure out how difficult it is? seems like V6 trannies are more plentiful, and won't have as much wear & tear on them.
i don't care to rebuild the entire trans, just want it to be able to hold up behind a small block.
i don't care to rebuild the entire trans, just want it to be able to hold up behind a small block.
Senior Member
Joined: Feb 2003
Posts: 572
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From: Manchester, NH
Car: 91 Firebird
Engine: 191ci 6cyl
Transmission: 700r4
I would think it's not easy at all, if it was simple then v6 guys (like me) would take v8 trannies and put them on our 6's since they're made to be stronger.
Joined: Sep 2005
Posts: 27,879
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
From an old post by someone who knows what they're doing with T-5s (RB83L69): Pretty short and sweet. I think that about covers it.
The clutch gear and countergear are different between the 2 transmissions The 6-cyl trans has a smaller clutch gear with fewer teeth and a larger countergear with more teeth, compared to the V8 ones. Since they have to match, you can't change just one, they have to be matched, as a set. The rebuild kits are teh same anyway, as they use the same bearings.
How to make a 6-cyl trans fit a V8 in 5 difficult and costly steps, assuming you already have the 6-cyl one:
1. Buy a V8 trans.
2. Buy a rebuild kit.
3. Take both transmissions apart.
4. Put all the v8 guts into the 6-cyl case (which incidentally is the same as the V8 case)
5. Put the V8 trans built in the former 6-cyl case in the car. Throw away a bunch of useless 6-cyl parts.
How to accomplish the same thing in 2 easy steps:
1. Buy a V8 trans.
2. Put the V8 trans in the car. Sell / throw away / give away 6-cyl transmission, whole.
How to make a 6-cyl trans fit a V8 in 5 difficult and costly steps, assuming you already have the 6-cyl one:
1. Buy a V8 trans.
2. Buy a rebuild kit.
3. Take both transmissions apart.
4. Put all the v8 guts into the 6-cyl case (which incidentally is the same as the V8 case)
5. Put the V8 trans built in the former 6-cyl case in the car. Throw away a bunch of useless 6-cyl parts.
How to accomplish the same thing in 2 easy steps:
1. Buy a V8 trans.
2. Put the V8 trans in the car. Sell / throw away / give away 6-cyl transmission, whole.
Joined: Sep 2005
Posts: 27,879
Likes: 2,431
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Brain surgery is "easy", for a brain surgeon. But I don't think you'd want me surging on your brain.
equals a complete rebuild. Easy for some, probably not so easy for someone who knows so little about these things that he has to ask if it can be done. 
just the input shaft and gears
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Joined: Dec 2005
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From: Boise,ID
Car: '85 Trans Am
Engine: 350 Crate Motor
Transmission: T-5
Axle/Gears: 3.27 posi
I heard that you could buy special clutch and that would be it. I even thought about doing such a thing and e-mailed a shop
_____
quote
The T-5 transmission from the v6 F-body uses a 14 spline x 1" input and came in a maximum O.D. of 9-5/8". The V8 never used the 14 spline and uses either a 10.4" or 11" O.D. The swap that you are inquiring about is a very common one. It requires a custom disc with the 14 spline x1" hub.
We stock the disc new for $67.80 plus tax. It requires no other changes.
Let us know if we can be of further assistance.
Jim Farina
Tampa Clutch Supply, Inc.
5005 40th Street
Tampa, FL 33610
813-623-1416
_____
quote
sounded kind of easy to me.
_____
quote
The T-5 transmission from the v6 F-body uses a 14 spline x 1" input and came in a maximum O.D. of 9-5/8". The V8 never used the 14 spline and uses either a 10.4" or 11" O.D. The swap that you are inquiring about is a very common one. It requires a custom disc with the 14 spline x1" hub.
We stock the disc new for $67.80 plus tax. It requires no other changes.
Let us know if we can be of further assistance.
Jim Farina
Tampa Clutch Supply, Inc.
5005 40th Street
Tampa, FL 33610
813-623-1416
_____
quote
sounded kind of easy to me.
Joined: Sep 2005
Posts: 27,879
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
That clutch disc doesn't turn a 6-cyl transmission into a V8 one. It also won't make it "hold up behind a small block".
The transmission will still have the same crappy SUPER-WIDE-RATIO gears, and the consequently even weaker clutch gear; since it's smaller as a result of the ratio change, and has fewer teeth.
So, while it "fits", and "works" as far as that goes, it doesn't address the real issues that a swapper faces; namely, a transmission that's just inferior in every way, for a performance application.
The transmission will still have the same crappy SUPER-WIDE-RATIO gears, and the consequently even weaker clutch gear; since it's smaller as a result of the ratio change, and has fewer teeth.
So, while it "fits", and "works" as far as that goes, it doesn't address the real issues that a swapper faces; namely, a transmission that's just inferior in every way, for a performance application.
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Joined: Sep 2005
Posts: 27,879
Likes: 2,431
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
An even better reason why, even though it's technically possible to do it, it's not a particularly "good" idea to spend extra money on a custom clutch in order to downgrade one of these cars to an even more fragile transmission than the already too-weak one that belongs there.
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