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> Hydra-matic 6-speed RWD Planetary MANUAL transmission from GM
Ynnek888
post May 10 2006, 03:34 PM
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http://media.gm.com/division/2004_prodinfo...tary_manual.pdf

Weird?

I hope they arrage the gates so that its hard to shift to reverse or "park" by accident...
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JKnight
post May 10 2006, 03:38 PM
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Interesting. I wonder what the purpose of a dedicated "Park" position on a manual transmission is. I've been using first for the last 20 years without issue.

Jason
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bubba353z
post May 10 2006, 04:28 PM
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Forgive the stupid question, but what's the benefit over a T-56 or similar unit?
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prockbp
post May 10 2006, 04:41 PM
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finally! i've been wanting a parking gear on my manual tranny for SOOOO LONg!! i'm glad somebody finally enginerd'it

This post has been edited by prockbp: May 10 2006, 04:42 PM
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BigEnos
post May 10 2006, 04:47 PM
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I think lenco drag racing transmissions are planetary. Maybe it's stronger than the typical 2 or 3 row setup? (IMG:http://www.frrax.com/rrforum/style_emoticons/default/unsure.gif)
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pknowles
post May 10 2006, 04:48 PM
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QUOTE
Forgive the stupid question, but what's the benefit over a T-56 or similar unit?


It should be stronger, cheaper, and heavier. I'm geussing that GM is tired of giving profits away to suppliers, when they can make tranmissions too. Designing a transmission case that will not flex and is not too heavy is hard. They are probably using the auto case becuase they have already done the R&D on it and it will fit in everything that the auto fits into.
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CMC#5
post May 11 2006, 03:47 PM
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Why do you think it'd be heavier necessarily? If planetary gearsets are stronger, then shouldnt it be lighter for the same torque rating?
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pknowles
post May 11 2006, 03:57 PM
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I think it will be heaver because if they have a park position then they I "geuss" they are keeping everything for the parking claw, so that is all extra weight. Plus automatic cases usually thicker then manual ones, so the auto case will probably be heavier then true manual case. Of course wait til it comes out and weight it to be sure.
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BigEnos
post May 11 2006, 04:04 PM
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Someone on a different list postulated that the "P" position would be to facilitate remote engine start on manual transmission vehicles. Poopoo if you wish but I think it makes a lot of sense.
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Ynnek888
post May 11 2006, 04:39 PM
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QUOTE (BigEnos @ May 11 2006, 11:04 AM) *
Someone on a different list postulated that the "P" position would be to facilitate remote engine start on manual transmission vehicles. Poopoo if you wish but I think it makes a lot of sense.


I remember reading the C6 Corvette's won't let you open the push button doors unless the manual trans is in reverse, and I think even the car off.. Never sat in one yet to confirm this though.. Put a "p" position in this case, kinda makes sense.

Although IMO, I just wish the C6 would just have normal door handles.
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pknowles
post May 11 2006, 05:50 PM
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It will be interesting how this turns out. If the manuals and automatics share the same case then GM should be able to offer a manual trans in anything that can take the automatic. I still think this is a great move from a cost cutting stand point if GM can pull it off. I like it from a trans swap stand point for older cars too.
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