IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

How Many Gears

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Old 03-09-09, 11:02 PM
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Sodeti
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Default How Many Gears

Hey Guys, how many gears are there in the Auto Transmission?

I noticed that the car shifts gears some times but the gear number doesnt change, so does that mean there are 'half gears'...I know it sounds stupid, but my curiosity is driving me nuts...lol
Old 03-09-09, 11:06 PM
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XhyDra
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6 Gears, just change your info display on the odo.
Old 03-09-09, 11:58 PM
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kickin8
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6 speed.....
Old 03-10-09, 05:47 AM
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AtlantaGuy
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Originally Posted by XhyDra
6 Gears, just change your info display on the odo.

OP said display doesn't change so he/she has already turned on the info display.


I've noticed this as well. I think the automatic is a 6 speed with overdrive. When this happens, the car is just dropping out of overdrive.
Old 03-10-09, 06:32 AM
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tex2670
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Originally Posted by AtlantaGuy
OP said display doesn't change so he/she has already turned on the info display.


I've noticed this as well. I think the automatic is a 6 speed with overdrive. When this happens, the car is just dropping out of overdrive.
It's got 6 speeds. There are no hidden or additional gears.
Old 03-10-09, 06:56 AM
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Kurtz
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Overdrive is a term that means any gear less than 1:1, it's not a special mode.

The car has 6 forward gears, all of which should display on the correct screen of the multi-display as the car shifts through them. (which is NOT the same thing as the gear # that shows up in S mode)
Old 03-10-09, 10:30 AM
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AtlantaGuy
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Originally Posted by tex2670
It's got 6 speeds. There are no hidden or additional gears.

Then it may be the torq converter unlocking. It most definitely feels and appears to change gears though even though the gear display does not go down a notch, but the RPM's go UP about 500.
Old 03-10-09, 10:37 AM
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Sodeti
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AtlantaGuy your explanation sounds like what is happening...
Old 03-10-09, 11:32 AM
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blk250
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yah, 6 gears..sometimes I see it's skipping gear when going downhill or to a stop
Old 03-10-09, 02:39 PM
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The torque converter locks and unlocks in the top gears. So it may seem as though the car actually shifts, because you notice a drop in RPM, but its just the lock-up converter doing its job, eliminating slippage in the transmission to improve gas mileage.
Old 03-10-09, 03:03 PM
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IS-SV
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Originally Posted by RTIS250
The torque converter locks and unlocks in the top gears. So it may seem as though the car actually shifts, because you notice a drop in RPM, but its just the lock-up converter doing its job, eliminating slippage in the transmission to improve gas mileage.
Which gears does it lockup in, just 5 and 6?
Old 03-10-09, 03:11 PM
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ChrISF
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lol why don't you just put it in S mode and find out for yourself? haha
Old 03-10-09, 03:14 PM
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lobuxracer
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Originally Posted by IS-SV
Which gears does it lockup in, just 5 and 6?
Depends. If standard lock is working, 5 & 6 only.
The ECM operates the lock-up timing control in order to improve the fuel consumption performance while in top gear with the shift lever in the S4 or S5 range, and in 5th or 6th gear with the shift lever in the S6 range or D position.
If flex lock is working, 3 - 6.
In the low-to-mid-speed range... ...The flex lock-up clutch control operates in the 3rd, 4th, 5th and 6th gears in both D position and S6 range, 3rd, 4th and 5th gears in the S5 range and 3rd and 4th gears in the S4 range.
Old 03-10-09, 03:56 PM
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fredw1
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And now for the dumb question: how does one know which of these locking types is happening?

I don't have any problems with my display or shifting, but was fascinated by the explanation from lobuxracer.
Old 03-10-09, 04:36 PM
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AtlantaGuy
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Originally Posted by lobuxracer
Depends. If standard lock is working, 5 & 6 only.


If flex lock is working, 3 - 6.


Ditto what Fredw1 asked about this.

There appears to be some overlap with 5 & 6 as they are on both lists.


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