Go Back   Tacoma World Forums > Tacoma Garage > Towing

Notices

What is the upper limit of transmission fluid temperature?

Reply
 
Thread Tools Search this Thread
Old 10-21-2012, 03:34 PM   #1
J Gibson [OP] J Gibson is offline
Senior Member
J Gibson is on a distinguished road
 
J Gibson's Avatar
Navy: Hospital Corpsman, 4th MarDiv
Name: J
Joined: May 2012, #78108
Location: Knoxville, TN
Gender: Male
Posts: 230
J Gibson's Tacoma Gallery
Question What is the upper limit of transmission fluid temperature?

Does anyone know at what temperature the transmission fluid becomes dangerously hot? How long can it remain at that temperture before damage occurs?
  Reply With Quote
Old 10-21-2012, 03:36 PM   #2
Senior Member
S.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shed
 
S.B.'s Avatar
Name: Sean
Joined: Jun 2009, #18838
Location: SD, CA Now in Colorado Springs, CO
Age: 22
Gender: Male
Posts: 3,549
S.B.'s Tacoma Gallery
If I saw 250F I would pull over and let it cool.
  Reply With Quote
Old 10-21-2012, 03:36 PM   #3
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
chris4x4's Avatar
Name: FlimFlubberJAM
Joined: May 2008, #6497
Location: Tenoe, AZ
Gender: Male
Posts: 96,874
chris4x4's Tacoma Gallery
Normal can run between 180* and 200*. Over 300* can be bad, with parts beginning to break at 350*
  Reply With Quote
Old 10-21-2012, 03:46 PM   #4
Senior Member
Robertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shed
 
Robertgeejr1's Avatar
Name: Robert
Joined: Dec 2011, #69167
Location: Aorora, Ill, yeah!
Gender: Male
Posts: 776
Robertgeejr1's Tacoma Gallery
and if your checking it and its not bright red, that could indicate that its gotten too hot, and maybe you should look into changing it.
I am not a expert with auto trans, but this is what I have always been told.
a good synthetic brand of fluid has a higher heat point but, but its best to never test any fluid on their heat range, for your trans sake.
  Reply With Quote
Old 10-21-2012, 03:56 PM   #5
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
chris4x4's Avatar
Name: FlimFlubberJAM
Joined: May 2008, #6497
Location: Tenoe, AZ
Gender: Male
Posts: 96,874
chris4x4's Tacoma Gallery
Quote:
Originally Posted by Robertgeejr1 View Post
and if your checking it and its not bright red, that could indicate that its gotten too hot, and maybe you should look into changing it.
I am not a expert with auto trans, but this is what I have always been told.
a good synthetic brand of fluid has a higher heat point but, but its best to never test any fluid on their heat range, for your trans sake.
The fluid breaking down due to heat is not as much the problem, as the parts breaking due to heat. Most all fluids wont break down until over 500*. many parts in the valve body can break at a much lower temps.
  Reply With Quote
Old 10-21-2012, 07:00 PM   #6
Senior Member
Robertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shed
 
Robertgeejr1's Avatar
Name: Robert
Joined: Dec 2011, #69167
Location: Aorora, Ill, yeah!
Gender: Male
Posts: 776
Robertgeejr1's Tacoma Gallery
Quote:
Originally Posted by chris4x4 View Post
The fluid breaking down due to heat is not as much the problem, as the parts breaking due to heat. Most all fluids wont break down until over 500*. many parts in the valve body can break at a much lower temps.

actually that is the problem, when it gets too hot it looses its viscosity, and the damage can happen very fast.
  Reply With Quote
Old 10-21-2012, 07:05 PM   #7
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
chris4x4's Avatar
Name: FlimFlubberJAM
Joined: May 2008, #6497
Location: Tenoe, AZ
Gender: Male
Posts: 96,874
chris4x4's Tacoma Gallery
Quote:
Originally Posted by Robertgeejr1 View Post
wow, I would just never have thought about that. wow.
and nothing about it becoming discolored?
if it changes from Red to brown, it could mean it was over heated, but in most cases, in a propperly operating vehicle, it means its getting time to change it. just like engine oil, part of the tranny fluids job is to keep suspended particles that could cause damage/wear.
  Reply With Quote
Old 10-21-2012, 07:16 PM   #9
Senior Member
Robertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shed
 
Robertgeejr1's Avatar
Name: Robert
Joined: Dec 2011, #69167
Location: Aorora, Ill, yeah!
Gender: Male
Posts: 776
Robertgeejr1's Tacoma Gallery
that's right, but with towing, (and the fact the op seems to have a 2012 truck) you would check the fluids before towing on a trip, and if you stop and there is now discoloring that would be a cause for alarm.

and if she does run warm, try to pull over, and let it rest, if possible let her idle, and keep the coolant flowing.
  Reply With Quote
Old 10-21-2012, 07:20 PM   #10
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
chris4x4's Avatar
Name: FlimFlubberJAM
Joined: May 2008, #6497
Location: Tenoe, AZ
Gender: Male
Posts: 96,874
chris4x4's Tacoma Gallery
Quote:
Originally Posted by Robertgeejr1 View Post
that's right, but with towing, (and the fact the op seems to have a 2012 truck) you would check the fluids before towing on a trip, and if you stop and there is now discoloring that would be a cause for alarm.

and if she does run warm, try to pull over, and let it rest, if possible let her idle, and keep the coolant flowing.
The second gens dont have a dip stick to check the tranny fluid with. However, the fluid also runs thru the lower part of the radiator, so if the Engine temp is in the good range, all should be fine with the tranny. There is an tranny over heat light (Ive heard) on the newer trucks, but I have also heard that if it iluminates, the damage has already been done.
  Reply With Quote
Old 10-21-2012, 07:28 PM   #11
Senior Member
Robertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shedRobertgeejr1 is one of the sharper tools in the shed
 
Robertgeejr1's Avatar
Name: Robert
Joined: Dec 2011, #69167
Location: Aorora, Ill, yeah!
Gender: Male
Posts: 776
Robertgeejr1's Tacoma Gallery
Quote:
Originally Posted by chris4x4 View Post
The second gens dont have a dip stick to check the tranny fluid with. However, the fluid also runs thru the lower part of the radiator, so if the Engine temp is in the good range, all should be fine with the tranny. There is an tranny over heat light (Ive heard) on the newer trucks, but I have also heard that if it iluminates, the damage has already been done.
well that's strange. how is a owner supposed to check the fluid level?
and I am aware of that also, esp since Nissan owners are finding out the hard way that this might not be a good setup.
  Reply With Quote
Old 10-21-2012, 07:34 PM   #12
Mid Traveling
12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed12TRDTacoma is one of the sharper tools in the shed
 
12TRDTacoma's Avatar
Army: MP
Name: Roberto
Joined: Aug 2012, #85133
Location: Concord, CA
Gender: Male
Posts: 2,150
12TRDTacoma's Tacoma Gallery
Yeah, truthfully as long as you are not overheating all should be good because the fastest way to cool down fluid is by water (hence the reason why it flows through the radiator) but also all TRD off road and sport packages come with an additional tranny cooler aside from the radiator cooler support to promote further cooling of the transmission especially during those extensive towing sessions.

In all reality I wouldn't even worry about it as long as you perform your routine maintenance and keep all items in good working order.

PS: No tranny dipstick is bullshit 'Yota.. That is all. Anytime I hear "lifetime fluid" from any manufacturer which is becoming increasingly common in some sort of attempt to make them look more impressive, I put my finger in the air and feel which way the bullshits blowing.
  Reply With Quote
Old 11-24-2012, 04:30 AM   #13
J Gibson [OP] J Gibson is offline
Senior Member
J Gibson is on a distinguished road
 
J Gibson's Avatar
Navy: Hospital Corpsman, 4th MarDiv
Name: J
Joined: May 2012, #78108
Location: Knoxville, TN
Gender: Male
Posts: 230
J Gibson's Tacoma Gallery
Question

Quote:
Originally Posted by Robertgeejr1 View Post
that's right, but with towing, (and the fact the op seems to have a 2012 truck) you would check the fluids before towing on a trip, and if you stop and there is now discoloring that would be a cause for alarm.

and if she does run warm, try to pull over, and let it rest, if possible let her idle, and keep the coolant flowing.
You're right, I do have a 2012, but the fact that it has a "sealed" transmission and no dipstick for it, watching fluid color is not an option. I would also be concerned that if I got the fluid so hot that it truly broke down, lost viscosity, changed colors, or whatever, it would be too late and damage to transmission will already have occurred. Thus, I have a scangauge which tells me the fluid temp, just need to know what point I need to get concerned.

I guess I will try to use the poster aboves guideline of 210-220 and ohh shit at 260, but those temps seem pretty low. I haven't towed since getting the gauge, but I got the temp up close to the 200 range going across the "mountains" in NC on I-40 with no trailer.
  Reply With Quote
Old 03-22-2013, 11:23 AM   #14
Senior Member
jdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud of
Navy: Radioman Petty Officer Second Class
Joined: Dec 2009, #27329
Location: Flagstaff, AZ
Gender: Male
Posts: 182
jdavis92's Tacoma Gallery
How is everyone keeping an eye on their tranny temps?

I am thinking of putting some gauges on the pillar to monitor it.

Is there an overriding assumption that the tranny temps are close to the coolant/engine temps if you have the factory tow package and supplemental tranny cooler?
  Reply With Quote
Old 03-22-2013, 11:41 AM   #15
Look away, I'm hideous!
joneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shedjoneill03 is one of the sharper tools in the shed
 
joneill03's Avatar
Name: Johnny-5
Joined: Oct 2009, #24912
Location: Chantilly, VA
Age: 35
Gender: Male
Posts: 3,340
joneill03's Tacoma Gallery
Quote:
Originally Posted by jdavis92 View Post
How is everyone keeping an eye on their tranny temps?

I am thinking of putting some gauges on the pillar to monitor it.

Is there an overriding assumption that the tranny temps are close to the coolant/engine temps if you have the factory tow package and supplemental tranny cooler?
I don't believe the manual transmissions have the sensor to monitor the temps, but the autos can use a scangauge, ultragauge, etc...
  Reply With Quote
Old 03-22-2013, 11:55 AM   #16
Recklessly tired
Fightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shedFightnfire is one of the sharper tools in the shed
 
Fightnfire's Avatar
Name: Luke
Joined: Jun 2011, #58178
Location: Washington
Gender: Dude
Posts: 4,100
Fightnfire's Tacoma Gallery
Quote:
Originally Posted by 12TRDTacoma View Post
Yeah, truthfully as long as you are not overheating all should be good because the fastest way to cool down fluid is by water (hence the reason why it flows through the radiator) but also all TRD off road and sport packages come with an additional tranny cooler aside from the radiator cooler support to promote further cooling of the transmission especially during those extensive towing sessions.

In all reality I wouldn't even worry about it as long as you perform your routine maintenance and keep all items in good working order.

PS: No tranny dipstick is bullshit 'Yota.. That is all. Anytime I hear "lifetime fluid" from any manufacturer which is becoming increasingly common in some sort of attempt to make them look more impressive, I put my finger in the air and feel which way the bullshits blowing.
I thought the tow package, which is where the tranny cooler comes from, is a stand alone add not automatically included with every TRD.
  Reply With Quote
Old 03-22-2013, 12:36 PM   #17
Senior Member
jdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud of
Navy: Radioman Petty Officer Second Class
Joined: Dec 2009, #27329
Location: Flagstaff, AZ
Gender: Male
Posts: 182
jdavis92's Tacoma Gallery
Quote:
Originally Posted by joneill03 View Post
I don't believe the manual transmissions have the sensor to monitor the temps, but the autos can use a scangauge, ultragauge, etc...
Nope. At least not on a 2005 SR5 w/towing package.

I have an Ultraguage and tranny temp is not an option on my truck. So I was looking at some aftermarket gauges that folks are mounting on pillars and I was wondering where they are getting the temp feed from.
  Reply With Quote
Old 03-22-2013, 03:26 PM   #18
Senior Member
S.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shedS.B. is one of the sharper tools in the shed
 
S.B.'s Avatar
Name: Sean
Joined: Jun 2009, #18838
Location: SD, CA Now in Colorado Springs, CO
Age: 22
Gender: Male
Posts: 3,549
S.B.'s Tacoma Gallery
This is the write-up I followed: http://www.ttora.com/forum/showthrea...865#post967865


works very well. I have an auto meter sport comp 3357 gauge. I just put in a piller pod by Lotek.
  Reply With Quote
Old 03-22-2013, 03:29 PM   #19
Banned
SoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shedSoCaltaco65 is one of the sharper tools in the shed
Joined: May 2011, #56389
Gender: Male
Posts: 6,995
SoCaltaco65's Tacoma Gallery
Typical ATF has a flash point of 315-325 Degrees.
  Reply With Quote
Old 03-22-2013, 03:45 PM   #20
Senior Member
jdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud ofjdavis92 has much to be proud of
Navy: Radioman Petty Officer Second Class
Joined: Dec 2009, #27329
Location: Flagstaff, AZ
Gender: Male
Posts: 182
jdavis92's Tacoma Gallery
Quote:
Originally Posted by S.B. View Post
This is the write-up I followed: http://www.ttora.com/forum/showthrea...865#post967865


works very well. I have an auto meter sport comp 3357 gauge. I just put in a piller pod by Lotek.
How much time and money invested in that setup?

Nicely done I think. Could be a good project before the temps get up here.

I guess I just wonder why Toyota doesn't have stock sensors. Or I guess I wonder what would trip the tranny temp dummy light....why not send that to an SG or Ultragauge?
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
transmission fluid currierstaco 2nd Gen. Tacomas 13 10-22-2012 05:03 AM
Transmission Fluid ? wurthit4660 1st Gen. Tacomas 3 11-17-2011 04:46 PM
transmission fluid? tacosuprem 1st Gen. Tacomas 7 06-16-2010 03:21 PM
Transmission Fluid Flush 4.0 V6 5 spd 4x4, various fluid capacities question. Scott K 2nd Gen. Tacomas 3 01-09-2010 11:08 PM
Transmission Fluid?????????? Johnny_knox69 2nd Gen. Tacomas 10 12-19-2008 02:35 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.