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#4702148 - 03/21/18 03:59 PM My ATF never gets Hot?
Gebo Offline


Registered: 09/18/02
Posts: 1986
Loc: VA
Without mentioning any names, I have noticed my ATF NEVER gets hot. I pulled a lawnmower on a trailer for 2 hours on the interstate and my ATF was barely warm. I know that's good. BUT...

How do I determine proper fluid level? This vehicle has a dipstick so I can check it. Do I keep it between the "COLD" hashmarks or do I add up to the "HOT" hashmarks? I ain't making this up. As soon as I got back home from the haul, I kept 4Runner running, shifted through all the gears, pulled the dipstick out, wiped it off, reinserted and the reading is slightly above the upper "COLD" marks but no where near the "HOT" range.
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#4702153 - 03/21/18 04:01 PM Re: My ATF never gets Hot? [Re: Gebo]
old1 Offline


Registered: 01/04/11
Posts: 963
Loc: Columbus Nebraska
But is the OIL hot?
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#4702157 - 03/21/18 04:03 PM Re: My ATF never gets Hot? [Re: Gebo]
Leo99 Online   content


Registered: 03/30/14
Posts: 2866
Loc: NJ
Do you think it's not at the correct fill level? I'd fill it to the cold line when it's cold (around 65įF).
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#4702159 - 03/21/18 04:04 PM Re: My ATF never gets Hot? [Re: Gebo]
zorobabel Offline


Registered: 01/27/11
Posts: 437
Loc: Anaheim, CA
Are you determining the "hotness" of the ATF by the fluid level on the dipstick?
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#4702171 - 03/21/18 04:13 PM Re: My ATF never gets Hot? [Re: Gebo]
pbm Offline


Registered: 04/19/04
Posts: 7480
Loc: New York
It sounds like you need to add a little ATF...unless I'm reading your post wrong?
You need to check your ATF temp.

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#4702174 - 03/21/18 04:14 PM Re: My ATF never gets Hot? [Re: Gebo]
Trav Offline


Registered: 11/20/06
Posts: 18226
Loc: MA, Mittelfranken.de
What is the temp of the fluid?
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#4702257 - 03/21/18 05:29 PM Re: My ATF never gets Hot? [Re: Gebo]
silveravant Offline


Registered: 01/03/15
Posts: 247
Loc: Cleveland, OH
What does your owner's manual say? The answer to many questions.

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#4702298 - 03/21/18 06:09 PM Re: My ATF never gets Hot? [Re: Trav]
demarpaint Offline


Registered: 07/03/05
Posts: 29380
Loc: NY
Originally Posted By: Trav
What is the temp of the fluid?


Good question. OP-How did you determine the transmission fluid temperature? The fluid level changes with the temperature. I have a chart with temperatures and a special dipstick for both my Jeeps to determine the correct level based on temperature. As the fluid gets hotter the level moves higher. As long as the level corresponds with the temperature on the chart the level is correct. Without knowing the correct temperature of the ATF the level cannot be accurately set.
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#4702362 - 03/21/18 07:06 PM Re: My ATF never gets Hot? [Re: demarpaint]
Linctex Online   content


Registered: 12/31/16
Posts: 5626
Loc: Waco, TX
Originally Posted By: demarpaint
Without knowing the correct temperature of the ATF - the level cannot be accurately set.


Yes, you cannot put the cart before the horse.

Oh, BTW... as long as you are "somewhere around there" on your fluid level, you are fine.

Don't get obsessed about your oil level being ~4mm off (up or down) or something silly like that.
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#4702398 - 03/21/18 07:40 PM Re: My ATF never gets Hot? [Re: zorobabel]
Gebo Offline


Registered: 09/18/02
Posts: 1986
Loc: VA
Originally Posted By: zorobabel
Are you determining the "hotness" of the ATF by the fluid level on the dipstick?


By how the fluid feels on my fingers while touching the dip stick
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#4702402 - 03/21/18 07:42 PM Re: My ATF never gets Hot? [Re: Trav]
Gebo Offline


Registered: 09/18/02
Posts: 1986
Loc: VA
Originally Posted By: Trav
What is the temp of the fluid?


I was just going by feel and comparing it to how my water feels at 130 degrees coming out of my spigot at home. Maybe I should infrared it?
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'98 LEX LS400 280K
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'02 4Runner 225K
'05 Lex LS430 80K
'06 Toyota Highlander 140K
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#4702406 - 03/21/18 07:42 PM Re: My ATF never gets Hot? [Re: silveravant]
Gebo Offline


Registered: 09/18/02
Posts: 1986
Loc: VA
Originally Posted By: silveravant
What does your owner's manual say? The answer to many questions.


You aren't understanding my question. Owner's manual can't answer this question.
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'98 LEX LS400 280K
'00 LEX GS300 190K
'02 4Runner 225K
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'06 Toyota Highlander 140K
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#4702410 - 03/21/18 07:44 PM Re: My ATF never gets Hot? [Re: demarpaint]
Gebo Offline


Registered: 09/18/02
Posts: 1986
Loc: VA
Originally Posted By: demarpaint
Originally Posted By: Trav
What is the temp of the fluid?


Good question. OP-How did you determine the transmission fluid temperature? The fluid level changes with the temperature. I have a chart with temperatures and a special dipstick for both my Jeeps to determine the correct level based on temperature. As the fluid gets hotter the level moves higher. As long as the level corresponds with the temperature on the chart the level is correct. Without knowing the correct temperature of the ATF the level cannot be accurately set.


I was just going by feel as compared to my house hot water at 130. The fluid feels barely warm. I have touched other hot dipsticks (be nice grin) and the fluid was so hot it would burn my fingers. Maybe time for the infrared.
_________________________
'98 LEX LS400 280K
'00 LEX GS300 190K
'02 4Runner 225K
'05 Lex LS430 80K
'06 Toyota Highlander 140K
'09 Lex IS350 80K


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#4702555 - 03/21/18 09:55 PM Re: My ATF never gets Hot? [Re: Gebo]
VeryNoisyPoet Offline


Registered: 12/16/17
Posts: 88
Loc: Massachusetts
I installed a temp gauge out of curiosity on my car. If I'm on the highway with torque converter locked, my ATF will barely get up to 130F in the winter even when hauling a full load for nearly an hour, and that's with a coolant to ATF heat exchanger in the radiator end tank.

If you want to get it really warm, drive around town such that the torque converter is working harder, since that is where most of the heat is generated in an automatic.
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#4702579 - 03/21/18 10:24 PM Re: My ATF never gets Hot? [Re: Gebo]
eyeofthetiger Offline


Registered: 11/18/17
Posts: 652
Loc: South Carolina
Your transmission will last forever. I don't see the problem.
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