Is There A Fix For Auto Trans Wont Shift Into 4th Until Warm? - Toyota Yaris Forums

bronsin · 04-14-2011, 07:18 AM

Well, is there?

TRDMarty · 04-14-2011, 08:59 AM

There is ONLY ONE fix.
Let it WARM UP.
For the light in my 08 Auto HatchBack to turn off it takes 4 minutes total.
If you raise the RPM's to 2000 and hold it, the time is only 2 minutes.
The engine does have to generate heat then transfer that heat to the sensors to tell the computer, HEY, I'm warm now. Result is, normal operating conditions, use all gears.
I did a SIMPLE time study & these are the numbers.
Do this and your tranny will shift to 4th gear.
Just let it warm up or just plan your trips 4 minutes earlier. Your Yaris will love you for it.

bronsin · 04-14-2011, 09:37 AM

Well in order to test that theory you would need a 1 quart gas tank. Warm it up and drive it a mile and see how much gas was burned. Then DONT warm it up and drive a mile and measure the gas consumed. The problem with warming it up is you are BURNING GAS AND NOT MOVING!

One of them is more fuel efficient. But which?

nemelek · 04-14-2011, 09:41 AM

I find it only takes a block or 2 to warm up. Summer it nover comes on.

Hershey · 04-14-2011, 11:25 AM

Our 2008 sedan with the automatic starts out in 2nd for about 1 minute then does to 3rd and then to overdrive in about 1 and 1/4 miles . It's supposed to start in 3rd , then go to overdrive not long after the operating temp light goes out . Anyone else have the same issue ?

Brian · 04-14-2011, 01:35 PM

At 90° it will shift into 2nd
At 112° it will shift into 3rd
At 130° the light goes out
And at 139° it will shift into Drive

Betrivent · 04-14-2011, 01:40 PM

Do NOT idle to warm up. You're getting 0MPG when you idle.

Hershey · 04-14-2011, 01:54 PM

We don't idle , start up and go .

ROCKLANDTOYOTA · 04-14-2011, 01:58 PM

doesn't ALL automatic toyota tranny's do this? my 91 celica gt does it......

markitect · 04-14-2011, 03:30 PM

I just get in and go. And you can go 80 in 3rd(which warms it up real quick). So I've never seen it as a problem.

daf62757 · 04-14-2011, 04:32 PM

Quote:

Originally Posted by ROCKLANDTOYOTA

doesn't ALL automatic toyota tranny's do this? my 91 celica gt does it......

My 06 Rav 4 and 2004 4Runner didn't.

41magmag41 · 04-14-2011, 06:45 PM

Quote:

Originally Posted by bronsin

Well, is there?

It's an emission thing for the computer. Why fight it, all yaris automatics do it. I find that it takes me about 2 miles and reaching a temp of 137 degrees and it slips right into 4th. I'm still getting 38.5 to 41.5 mpg on her and drive the interstate to work for 28 miles at speeds around 75. Not bad.

I would live with it and not push the car as it's designed that way.

bronsin · 04-15-2011, 03:54 AM

Quote:

Originally Posted by 41magmag41

It's an emission thing for the computer. Why fight it, all yaris automatics do it. I find that it takes me about 2 miles and reaching a temp of 137 degrees and it slips right into 4th. I'm still getting 38.5 to 41.5 mpg on her and drive the interstate to work for 28 miles at speeds around 75. Not bad.

I would live with it and not push the car as it's designed that way.

But you are burning MORE gas when doing that. I dont drive on the highway were I can get 40 mpg. I just drive 6.5 miles to work and back everyday. A mile or two of that is being stuck in 3rd gear.This winter with winter crap gas and temps in the teens and 20s in the morning, I got lows of 28 mpg. And I never exceeded 45 mph. With a manual you can be in 5th gear ANYTIME you want. So dont try to tell me it HAS TO be that way because it doesnt.

ROCKLAND TOYOTA · 04-15-2011, 09:33 AM

Quote:

Originally Posted by daf62757

My 06 Rav 4 and 2004 4Runner didn't.

05 RAV I HAD DID.......

Hershey · 04-15-2011, 10:53 AM

" A mile or two of that is being stuck in 3rd gear. "

Same here , usually 1 and 1/2 miles in 3rd when cold . Then a few seconds after the operating temp light goes out the 4th gear ( overdrive ) kicks in .

Hershey · 04-15-2011, 11:02 AM

" Do NOT idle to warm up. You're getting 0MPG when you idle. "

You'd be amazed how much fuel is consumed when letting the car idle to warm up . THe ECO-METER we have verifies that . Also , the fuel can get into your engine oil causing fuel dilution . Making your oil less protective . States this with the papers that came with the U.O.A. kit from BLACKSTONE labs for preparation to send in the oil sample . Best to drive the car for about 20 minutes ( start and go ) and not to let it idle to operating temperature before taking a sample so not to have excessive fuel in oil for the analysis .

bronsin · 04-15-2011, 11:42 AM

Fuel dilution happened in carbed engines that idled because the mixture was rich. With FI that is not the case. The mixture is correct.

You still have the problem of increased warmup time however if you idle. And of course if you aint moving youre losing.

Im hoping Scotts reisitor mod will prove feasable. I got 28 mpg at times this winter driving 6.5 miles to work.

Proof is in the pudding. Either it gets better with the mod or it doesnt.

But Im wondering if the 3rd gear thing is to warm up the TRANSMISSION not the engine?

41magmag41 · 04-15-2011, 06:02 PM

Quote:

Originally Posted by bronsin

But you are burning MORE gas when doing that. I dont drive on the highway were I can get 40 mpg. I just drive 6.5 miles to work and back everyday. A mile or two of that is being stuck in 3rd gear.This winter with winter crap gas and temps in the teens and 20s in the morning, I got lows of 28 mpg. And I never exceeded 45 mph. With a manual you can be in 5th gear ANYTIME you want. So dont try to tell me it HAS TO be that way because it doesnt.

According to toyota designers yes it does. you should have bought a manual if you want to be in high gear in a hurry. Live with it or trade it for a manual.

Better yet take public transportation and you save a load of gas and we save a load of gas.

04-14-2011, 07:18 AM	#1
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,790	Is There A Fix For Auto Trans Wont Shift Into 4th Until Warm? Well, is there?

04-14-2011, 09:41 AM	#4
nemelek DWEED Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008 Location: Arizona Posts: 1,161	I find it only takes a block or 2 to warm up. Summer it nover comes on. __________________ Making a decision without following it with an action is still a fantasy.

04-14-2011, 01:35 PM	#6
Brian Drives: '07 Yaris turbo, '11 Juke Join Date: Mar 2007 Location: Riverside, CA Posts: 849	At 90° it will shift into 2nd At 112° it will shift into 3rd At 130° the light goes out And at 139° it will shift into Drive __________________ http://www.cardomain.com/ride/3875996

04-14-2011, 01:58 PM	#9
ROCKLANDTOYOTA JOE GIRTH Drives: YARIS 3DOOR Join Date: Feb 2007 Location: ROCKLAND TOYOTA/SCION Posts: 369	doesn't ALL automatic toyota tranny's do this? my 91 celica gt does it...... __________________ http://www.carid.com/toyota-accessories/ site has a FEW interesting yaris items.....

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04-14-2011, 08:59 AM	#2
TRDMarty Drives: Polar White 2008, 3Dr HB TRD ' Join Date: Mar 2009 Location: Corona CA Posts: 403	There is ONLY ONE fix. Let it WARM UP. For the light in my 08 Auto HatchBack to turn off it takes 4 minutes total. If you raise the RPM's to 2000 and hold it, the time is only 2 minutes. The engine does have to generate heat then transfer that heat to the sensors to tell the computer, HEY, I'm warm now. Result is, normal operating conditions, use all gears. I did a SIMPLE time study & these are the numbers. Do this and your tranny will shift to 4th gear. Just let it warm up or just plan your trips 4 minutes earlier. Your Yaris will love you for it.

04-14-2011, 09:37 AM	#3
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,790	Well in order to test that theory you would need a 1 quart gas tank. Warm it up and drive it a mile and see how much gas was burned. Then DONT warm it up and drive a mile and measure the gas consumed. The problem with warming it up is you are BURNING GAS AND NOT MOVING! One of them is more fuel efficient. But which?

04-14-2011, 11:25 AM	#5
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	Our 2008 sedan with the automatic starts out in 2nd for about 1 minute then does to 3rd and then to overdrive in about 1 and 1/4 miles . It's supposed to start in 3rd , then go to overdrive not long after the operating temp light goes out . Anyone else have the same issue ?

04-14-2011, 01:40 PM	#7
Betrivent Not quite a noob Drives: e46 325 Join Date: Jul 2009 Location: edmonton Posts: 1,408	Do NOT idle to warm up. You're getting 0MPG when you idle.

04-14-2011, 01:54 PM	#8
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	We don't idle , start up and go .

04-14-2011, 03:30 PM	#10
markitect Drives: Yaris Join Date: Oct 2008 Location: Michigan Posts: 199	I just get in and go. And you can go 80 in 3rd(which warms it up real quick). So I've never seen it as a problem.

04-15-2011, 10:53 AM	#15
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	" A mile or two of that is being stuck in 3rd gear. " Same here , usually 1 and 1/2 miles in 3rd when cold . Then a few seconds after the operating temp light goes out the 4th gear ( overdrive ) kicks in .

04-15-2011, 11:02 AM	#16
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	" Do NOT idle to warm up. You're getting 0MPG when you idle. " You'd be amazed how much fuel is consumed when letting the car idle to warm up . THe ECO-METER we have verifies that . Also , the fuel can get into your engine oil causing fuel dilution . Making your oil less protective . States this with the papers that came with the U.O.A. kit from BLACKSTONE labs for preparation to send in the oil sample . Best to drive the car for about 20 minutes ( start and go ) and not to let it idle to operating temperature before taking a sample so not to have excessive fuel in oil for the analysis .

04-15-2011, 11:42 AM	#17
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,790	Fuel dilution happened in carbed engines that idled because the mixture was rich. With FI that is not the case. The mixture is correct. You still have the problem of increased warmup time however if you idle. And of course if you aint moving youre losing. Im hoping Scotts reisitor mod will prove feasable. I got 28 mpg at times this winter driving 6.5 miles to work. Proof is in the pudding. Either it gets better with the mod or it doesnt. But Im wondering if the 3rd gear thing is to warm up the TRANSMISSION not the engine?