- #4582 of 4944
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Re: 07 Camry Problem [650spx]
by dmathews3
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Sep 17, 2008 (7:11 am)
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Replying to: 650spx (Sep 16, 2008 6:11 pm)
Isn't the Camry a 6 speed tranny? How can it be turned into an 8 sp. tranny? A true 8 sp. would have the gears in it to make it an 8 sp or is this just one of those varial ratio trannies they talk about, and not a true 8 sp?
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- #4583 of 4944
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Re: 07 Camry Problem [dmathews3]
by 210delray
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Sep 17, 2008 (7:21 am)
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Replying to: dmathews3 (Sep 17, 2008 7:11 am)
It can't; I think 650spx was joking.
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- #4584 of 4944
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Re: 07 Camry Problem [dmathews3]
by kiawah
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Sep 17, 2008 (8:37 am)
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Replying to: dmathews3 (Sep 17, 2008 7:11 am)
He may have been referring to a pseudo 2 extra gears.
I know with the I4-5 speed we have, once it is in 5th gear, the computer will 'lock up' the torque converter, which has an effect of dropping a couple hundred rpms off the tach at highway speeds. If you were watching the tach when shifting, you would think that the 5 speed was actually a 6 speed.
It may be that the V6-6speed model he referenced can lock up in both of the real 5th and 6th gears, making it seem like an 8 speed. Don't know, only guessing.
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- #4585 of 4944
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Re: 07 Camry Problem [dmathews3]
by wwest
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Sep 17, 2008 (9:05 am)
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Replying to: dmathews3 (Sep 17, 2008 7:11 am)
In actuality a modern automatic with "only" six "hard" gear ratios might have as many as 9 (10??)forward speeds. The lockup torque converter clutch might now be engaged in as many as half, or more, of the upper gear ratios given the road speed and provided the torque requirement is low enough, no acceleration.
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- #4586 of 4944
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Re: 07 Camry Problem [wwest]
by dmathews3
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Sep 17, 2008 (10:17 am)
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Replying to: wwest (Sep 17, 2008 9:05 am)
In other words advertising hipe since cars have had lockup torque converters for years.
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- #4587 of 4944
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Re: 07 Camry Problem [210delray]
by 650spx
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Sep 17, 2008 (4:46 pm)
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Replying to: 210delray (Sep 17, 2008 7:21 am)
I was half joking you can't put the lexus program in to the camry. But the lexus uses the exact same trans. I has a ravigneaux planetary gear unit and seprate planetry gear sets on the same axis I bleave it is capable of 9 or 10 true gears plus the lock up feature. It also uses linear solenoids instead of the on/off type.
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- #4588 of 4944
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Re: 07 Camry Problem [dmathews3]
by wwest
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Sep 17, 2008 (6:26 pm)
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Replying to: dmathews3 (Sep 17, 2008 10:17 am)
No, historically the OD lockup clutch was only used in top, OD, gear.
Apparently someone came to the realization, FINALLY, that the OD clutch could be used to increase FE even in the lower, non-OD, gear ratios.
Oh, and for the V6's with 6 speeds oftentimes two of the top gears are OD.
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- #4589 of 4944
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Re: 07 Camry Problem [wwest]
by 650spx
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Sep 18, 2008 (4:55 pm)
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Replying to: wwest (Sep 17, 2008 6:26 pm)
You are correct that now lock up get's used more than it did in the past, but this toyota trans has 6 solid gears in camry and 8 in the lexus It can have 9 total gears with out using the converter lockup. It is pretty neat how it works. I wish I could give you the spec sheet and more paper information.
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- #4590 of 4944
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Re: 07 Camry Problem [650spx]
by wwest
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Sep 19, 2008 (8:48 am)
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Replying to: 650spx (Sep 18, 2008 4:55 pm)
Don't need specs/paper as I have access to techinfo.toyota.com....
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- #4591 of 4944
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Re: 07 Camry Problem [wwest]
by 650spx
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Sep 19, 2008 (3:48 pm)
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Replying to: wwest (Sep 19, 2008 8:48 am)
Thats expensive unless you work for a shop or know someone.
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