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Old 08-30-2019, 01:34 PM #16
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Quote:
Originally Posted by Thrasher_S View Post
My understanding is shifting to "S" lets you pick the HIGHEST gear available, so the default is 4th. If you slow down the transmission will still shift to 3, 2, 1, unless you pick a lower gear.

So, putting it manually in "1" only lets you use first gear, "2" is first and second, and so on.

I feel like it also changes shift points. The lower the number, the higher the revs before it shifts. Anybody else feel this?
Your understanding is correct and the way a shift limiter works.
I hadn’t noticed any change in shift points, but when wheeling on dirt I really prefer to be in control of the gearing more by using the “S” mode. Going up a steep hill in 4lo I may not want it to be able to shift out of first until I’m ready.
Now in city traffic I think hitting 5th gear when going 30mph is counter productive and the main reason I leave 4th as my top gear. I notice much better acceleration. After backing out of my garage the first thing I do is put it in “S” mode.
I wonder if there has ever been a forum poll done on driving in “S” mode as a preference when applicable and if the driver notices improved performance.
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Old 08-30-2019, 04:22 PM #17
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this isnt a sports car
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Old 08-30-2019, 04:30 PM #18
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Originally Posted by 1jzgte View Post
this isnt a sports car
True. But if there is a additional gear and there's an option to manually shift I should be able to choose it. LOL

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Old 08-30-2019, 04:34 PM #19
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Quote:
Originally Posted by Ripper238 View Post
True. But if there is a additional gear and there's an option to manually shift I should be able to choose it. LOL

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The car isn’t going to let you do something that won’t work. You’re driving a 4.5k lb brick at 80mph up a hill. It’s physically not possible to maintain that in 5th gear. Have you ever tried riding a bike in the highest gear up an incline? It’s like that.

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Old 08-30-2019, 08:44 PM #20
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Using S mode and staying mostly in 5th on the hwy makes no noticeable difference in fuel economy from my extensive experience. I soon realized using 4th for long hwy hillclimbs will keep the transmission from hunting between 4th and 5th and it works well with CC. Obviously a long hillclimb will kill your Mpgs but you’re not doing any favors trying to get it in 5th sooner.
S mode is also damn useful in keeping the dreaded unwanted downhill downshift in check.
After renting a Chevy equinox and driving a few Hondas lately, I’ll take the 4R tranny quirks any day. CC still sucks though.
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Old 08-31-2019, 10:34 AM #21
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Quote:
Originally Posted by euser View Post
The car isnít going to let you do something that wonít work. Youíre driving a 4.5k lb brick at 80mph up a hill. Itís physically not possible to maintain that in 5th gear. Have you ever tried riding a bike in the highest gear up an incline? Itís like that.
Absolutely. But let me give a more specific example.

I'm in cruse control at 78mp and 3/4 up the hill it drops to 4th, i crest the hill and start going down and its still in 4th, i disengage cruse control and its still in 4th as it decelerates. I manually go into S mode and try shifting to 5th and nothing (im now at ~70mph). So i put it back in D and pump the gas and it goes into 5th.

This seems to only happen with this exact scenario.
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Old 08-31-2019, 11:19 AM #22
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Quote:
Originally Posted by Ripper238 View Post
Absolutely. But let me give a more specific example.

I'm in cruse control at 78mp and 3/4 up the hill it drops to 4th, i crest the hill and start going down and its still in 4th, i disengage cruse control and its still in 4th as it decelerates. I manually go into S mode and try shifting to 5th and nothing (im now at ~70mph). So i put it back in D and pump the gas and it goes into 5th.

This seems to only happen with this exact scenario.
Totally normal. All part of Toyota's "grade logic" programming for the trans. In this particular case (cresting a hill), the trans will hang onto 4th for way longer than necessary because it "thinks" the uphill grade might resume, requiring another downshift into 4th. The programming would rather stay in 4th too long and be absolutely sure you're done climbing hills than shift into 5th too early and start having to "hunt" between 4th and 5th. And yes, trying to "tell" it to shift into 5th using S mode will have no effect in this scenario.
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Old 08-31-2019, 12:00 PM #23
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Quote:
Originally Posted by TEujunga View Post
Totally normal. All part of Toyota's "grade logic" programming for the trans. In this particular case (cresting a hill), the trans will hang onto 4th for way longer than necessary because it "thinks" the uphill grade might resume, requiring another downshift into 4th. The programming would rather stay in 4th too long and be absolutely sure you're done climbing hills than shift into 5th too early and start having to "hunt" between 4th and 5th. And yes, trying to "tell" it to shift into 5th using S mode will have no effect in this scenario.
I run into this annoying uphill scenario when driving *without* cruise control. As I crest the hill in 4th and the road levels out, or even starts to decline, the transmission stays in 4th for quite a while, even if I back off on the pedal to lighten the load. After what seems like a long time, maybe 5-10 seconds, it finally shifts. My 3rd gen did not behave this way. After the transmission downshifted during a hill climb or accelerating to pass a car, when Iíd lighten up on the pedal the transmission would rather quickly up shift.

Damn ďgrade logicĒ.
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Old 08-31-2019, 12:14 PM #24
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Quote:
Originally Posted by Thrasher_S View Post
I feel like it also changes shift points. The lower the number, the higher the revs before it shifts. Anybody else feel this?
In my 2013 I always put it in S5 upon startup, this reduces the lag when wanting a downshift on a freeway ramp and does appear to slightly help the shift points.

When off-road I always use S mode to limit it to S2 or S3. Sometimes S4 when in 4L and on sand.
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Old 08-31-2019, 12:22 PM #25
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The manual does talk about this issue, but not in great detail. It has sections on S mode and AI-Shift mode.

"The engine speed may remain high after releasing the accelerator pedal. This does not indicate a malfunction".
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Old 08-31-2019, 12:57 PM #26
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Really only use the S mode for when I want to rev out higher. Whether that be when going up a steep incline on the trail, mud/snow, or when there's a short onramp.
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Old 08-31-2019, 08:22 PM #27
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Quote:
Originally Posted by TEujunga View Post
Totally normal. All part of Toyota's "grade logic" programming for the trans. In this particular case (cresting a hill), the trans will hang onto 4th for way longer than necessary because it "thinks" the uphill grade might resume, requiring another downshift into 4th. The programming would rather stay in 4th too long and be absolutely sure you're done climbing hills than shift into 5th too early and start having to "hunt" between 4th and 5th. And yes, trying to "tell" it to shift into 5th using S mode will have no effect in this scenario.
Really great info. Thanks for confirming this is normal. I'm so paranoid about my transmissions in my vehicles because I've blown so many over the years.

I guess the next question is when is the best mileage to change the transmission fluid? Lol

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Last edited by Ripper238; 08-31-2019 at 08:32 PM.
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Old 08-31-2019, 11:23 PM #28
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I guess the next question is when is the best mileage to change the transmission fluid? Lol
Changed mine at 55. Supposedly it's a "lifetime fluid" unless you do a lot of towing, but mine was already dirty. Then again I do have some added weight with the bumper, winch, rock sliders, as well as have bigger tires. All of which will cause more work for the transmission.

I just did a fluid exchange though, not the full hardcore dropping the pan and what not.
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