Toyota 120 Platforms Forum
Google only search Toyota120

Go Back   Toyota 120 Platforms Forum > General Tech > 4th Gen 4Runner & Hilux Surf

Reply
Thread Tools Display Modes
Unread 09-05-2016, 03:34 PM   #1
dagen
Rookie
 
Join Date: Sep 2015
Location: Oakland, CA
Posts: 13
Default Is there an ideal transmission fluid operating temp?

I just got a Scangauge II and installed a transmission cooler a few days after. I noticed an average 25* drop in the operating temperature.

I searched and read all sorts of things about not letting the transmission fluid get too hot when driving, but is there a risk of it running too cool at all? (ie. the fluid is not as lubricating when cool, or something like that)

Might be covered somewhere that I didn't find and maybe it's common knowledge that I just don't have yet. Thanks for any insight!
__________________
'06 Sport 4x4. Icon Stage II, Gobi Stealth Roof Rack, Shrockworks Sliders, Shrockworks Front Bumper, Comeup 9.5rs
dagen is offline   Reply With Quote
Unread 09-05-2016, 09:08 PM   #2
Chrisx
Driver
 
Chrisx's Avatar
 
Join Date: Oct 2010
Location: Denver
Posts: 254
Default

No way a 25 degree drop is anything but good.
Chrisx is offline   Reply With Quote
Unread 09-06-2016, 11:41 AM   #3
Mikestang
Don't follow this guy
 
Mikestang's Avatar
 
Join Date: Jun 2006
Location: The wild wild west
Posts: 4,463
Default

It won't run too cool, nothing to worry about there.

175 Degrees: 100,000+ miles (Normal is typically 179 to 195 degrees)
200 Degrees: 90,000 miles
225 Degrees: 55,000 miles (Pressure Drops)
250 Degrees: 25,000 miles (Valves Stick)
275 Degrees: 17,000 miles (Varnish Forms)
300 Degrees: 4,000 miles (Seals & Clutches Burn)
325 Degrees: TRANSMISSION FAILURE
__________________
'07 Ltd 4Runner v8 4x4 - Midland 75-822 + Wilson 5000, Garmin 276c, Magnaflow catback, Kurtfab front diff brace, 265/70/17 Goodyear ATA on Robby Gordon Signatures, Spidertrax, 3/4" BL, BajaRack, 2wd sway, Icon front, Overland Warehouse rear, Kurtfab v2.1 LCAs, MedicLinks, Slee SS lines, BB skids, Demello sliders & LCA ramps, All-Pro diff guard, TC full gusseted front, SW bumper
www.mikestang.com
Mikestang is offline   Reply With Quote
Unread 09-06-2016, 12:18 PM   #4
Chrisx
Driver
 
Chrisx's Avatar
 
Join Date: Oct 2010
Location: Denver
Posts: 254
Default

Quote:
Originally Posted by Mikestang View Post
It won't run too cool, nothing to worry about there.

175 Degrees: 100,000+ miles (Normal is typically 179 to 195 degrees)
200 Degrees: 90,000 miles
225 Degrees: 55,000 miles (Pressure Drops)
250 Degrees: 25,000 miles (Valves Stick)
275 Degrees: 17,000 miles (Varnish Forms)
300 Degrees: 4,000 miles (Seals & Clutches Burn)
325 Degrees: TRANSMISSION FAILURE
Nice summary Mike. Any idea how long at the higher temps cause issues? Pulling my trailer over the Rockies on hot days I've exceeded 250* for short periods of time. I do a drain & fill with oil changes during trailer season.
Chrisx is offline   Reply With Quote
Unread 09-06-2016, 02:11 PM   #5
Mikestang
Don't follow this guy
 
Mikestang's Avatar
 
Join Date: Jun 2006
Location: The wild wild west
Posts: 4,463
Default

I think it's just "prolonged" periods operating at those temps. I'll get over 230* at times when I'm hauling ass on the 40 through AZ uphill in the summer heat, but only for a few minutes.
__________________
'07 Ltd 4Runner v8 4x4 - Midland 75-822 + Wilson 5000, Garmin 276c, Magnaflow catback, Kurtfab front diff brace, 265/70/17 Goodyear ATA on Robby Gordon Signatures, Spidertrax, 3/4" BL, BajaRack, 2wd sway, Icon front, Overland Warehouse rear, Kurtfab v2.1 LCAs, MedicLinks, Slee SS lines, BB skids, Demello sliders & LCA ramps, All-Pro diff guard, TC full gusseted front, SW bumper
www.mikestang.com
Mikestang is offline   Reply With Quote
Unread 09-06-2016, 03:10 PM   #6
Jeffy
JetBoil Master
 
Jeffy's Avatar
 
Join Date: Dec 2014
Location: Bay Area, CA
Posts: 820
Default

Thanks for the info. I was a bit worried because I hit 230 hauling ass in shaver lake with a loaded car. Most of the time I'm around 170 on the freeway
__________________
'03 v8 LTD Totaled
'11 SR5 Pelfreybilt :: Radflo :: Total Chaos :: Stubbs Sliders :: RB BL :: 34x10.5 BFG T/A KO2 :: Rockford Fosgate, JL Audio
Jeffy is offline   Reply With Quote
Unread 09-06-2016, 06:24 PM   #7
BlackWorksInc
Senior Driver
 
BlackWorksInc's Avatar
 
Join Date: Mar 2011
Location: Bend, OR
Posts: 700
Default

Quote:
Originally Posted by Mikestang View Post
It won't run too cool, nothing to worry about there.

175 Degrees: 100,000+ miles (Normal is typically 179 to 195 degrees)
200 Degrees: 90,000 miles
225 Degrees: 55,000 miles (Pressure Drops)
250 Degrees: 25,000 miles (Valves Stick)
275 Degrees: 17,000 miles (Varnish Forms)
300 Degrees: 4,000 miles (Seals & Clutches Burn)
325 Degrees: TRANSMISSION FAILURE
I like this... where did you get the information?
__________________
BlackWorksInc is offline   Reply With Quote
Unread 09-06-2016, 08:31 PM   #8
dagen
Rookie
 
Join Date: Sep 2015
Location: Oakland, CA
Posts: 13
Default

Quote:
Originally Posted by Mikestang View Post
It won't run too cool, nothing to worry about there.

175 Degrees: 100,000+ miles (Normal is typically 179 to 195 degrees)
200 Degrees: 90,000 miles
225 Degrees: 55,000 miles (Pressure Drops)
250 Degrees: 25,000 miles (Valves Stick)
275 Degrees: 17,000 miles (Varnish Forms)
300 Degrees: 4,000 miles (Seals & Clutches Burn)
325 Degrees: TRANSMISSION FAILURE
This is awesome. Thanks for Sharing!!
__________________
'06 Sport 4x4. Icon Stage II, Gobi Stealth Roof Rack, Shrockworks Sliders, Shrockworks Front Bumper, Comeup 9.5rs
dagen is offline   Reply With Quote
Unread 09-06-2016, 08:54 PM   #9
Robinhood4x4
Driver
 
Join Date: Sep 2007
Posts: 253
Default

Quote:
Originally Posted by BlackWorksInc View Post
I like this... where did you get the information?
Ditto
__________________
1993 4Runner, V6, Auto Tranny, SAS.
2007 4Runner, 4wd, SR5, V6, Toytech bilstein lift.
Robinhood4x4 is offline   Reply With Quote
Unread 09-07-2016, 09:08 AM   #10
tigerwong58
Rock Ninja
 
tigerwong58's Avatar
 
Join Date: May 2009
Location: Kansas City, MO
Posts: 365
Default

good info
tigerwong58 is offline   Reply With Quote
Unread 09-07-2016, 10:26 AM   #11
Mikestang
Don't follow this guy
 
Mikestang's Avatar
 
Join Date: Jun 2006
Location: The wild wild west
Posts: 4,463
Default

It's from a Google search, random site: http://myautomatictransmission.com/t...ture-chart.htm
__________________
'07 Ltd 4Runner v8 4x4 - Midland 75-822 + Wilson 5000, Garmin 276c, Magnaflow catback, Kurtfab front diff brace, 265/70/17 Goodyear ATA on Robby Gordon Signatures, Spidertrax, 3/4" BL, BajaRack, 2wd sway, Icon front, Overland Warehouse rear, Kurtfab v2.1 LCAs, MedicLinks, Slee SS lines, BB skids, Demello sliders & LCA ramps, All-Pro diff guard, TC full gusseted front, SW bumper
www.mikestang.com
Mikestang is offline   Reply With Quote
Unread 09-07-2016, 05:50 PM   #12
alpinhi
Rookie
 
Join Date: May 2015
Posts: 10
Default

Quote:
Originally Posted by dagen View Post
I just got a Scangauge II and installed a transmission cooler a few days after. I noticed an average 25* drop in the operating temperature.

I searched and read all sorts of things about not letting the transmission fluid get too hot when driving, but is there a risk of it running too cool at all? (ie. the fluid is not as lubricating when cool, or something like that)

Might be covered somewhere that I didn't find and maybe it's common knowledge that I just don't have yet. Thanks for any insight!
Which tranny cooler did you install? I pulled a 4000lb travel trailer almost 4000 mi last July and I noticed my tranny temps hit 250 every now and then. In the mountains pulling I was usually in the 200 to 215 range. FYI I got my temp readings from the torque app. I have noticed some funky shifts every now then so I think Im going to have the dealer do a flush. I'm for sure going to install a cooler before our next trip.
alpinhi is offline   Reply With Quote
Unread 09-07-2016, 07:00 PM   #13
dagen
Rookie
 
Join Date: Sep 2015
Location: Oakland, CA
Posts: 13
Default

Quote:
Originally Posted by alpinhi View Post
Which tranny cooler did you install? I pulled a 4000lb travel trailer almost 4000 mi last July and I noticed my tranny temps hit 250 every now and then. In the mountains pulling I was usually in the 200 to 215 range. FYI I got my temp readings from the torque app. I have noticed some funky shifts every now then so I think Im going to have the dealer do a flush. I'm for sure going to install a cooler before our next trip.
I ordered the Hayden 678 from Amazon. It was a super easy install.
I followed the write up from Mike P. Here: http://www.toyota120.com/forum/showthread.php?t=21501


Hayden 678 link:https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

I also ordered 3/8 line since it comes with 11/32. the link is here:
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
__________________
'06 Sport 4x4. Icon Stage II, Gobi Stealth Roof Rack, Shrockworks Sliders, Shrockworks Front Bumper, Comeup 9.5rs
dagen is offline   Reply With Quote
Unread 09-07-2016, 07:16 PM   #14
Jeffy
JetBoil Master
 
Jeffy's Avatar
 
Join Date: Dec 2014
Location: Bay Area, CA
Posts: 820
Default

Quote:
Originally Posted by dagen View Post
I ordered the Hayden 678 from Amazon. It was a super easy install.
I followed the write up from Mike P. Here: http://www.toyota120.com/forum/showthread.php?t=21501


Hayden 678 link:https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

I also ordered 3/8 line since it comes with 11/32. the link is here:
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
I really need to do this.... added to my long list of mods
__________________
'03 v8 LTD Totaled
'11 SR5 Pelfreybilt :: Radflo :: Total Chaos :: Stubbs Sliders :: RB BL :: 34x10.5 BFG T/A KO2 :: Rockford Fosgate, JL Audio
Jeffy is offline   Reply With Quote
Unread 09-08-2016, 11:41 AM   #15
chayos00
Desert SW Roamer
 
chayos00's Avatar
 
Join Date: Dec 2009
Location: Desert Southwest
Posts: 436
Default

I've always wondered if I should add one since I live in Arizona, however I don't two. But I do offroad some. Of course the heavy mud 33" tires too.
__________________
2008 SR5 4x4 V6 Salsa Red Pearl w/Taupe Interior
Mods: OW 2.0", LR UCA's, 285/70R17 Cooper STT Pro's w/Spidertrax 1.25" Spacer, Magnaflow 14586 Muffler, SpeedoHealer, Stubbs HD-SKO Sliders, Odyssey PC1500
Audio: Eclipse HU CD8445, Polk Audio db6501 6.5" Components, Polk Audio db351 3.5" in factory tweeter location, 2 Sundown SA12's @ 1200W RMS
"I'm an AMERICAN by birth and a VETERAN by choice!"
chayos00 is offline   Reply With Quote
Unread 09-08-2016, 01:54 PM   #16
bulldog
Admin
 
bulldog's Avatar
 
Join Date: May 2005
Location: Walnut Creek, CA
Posts: 12,314
Default

Just FYI for those who don't know, but the V8 does come with a transmission cooler already. You can add or upgrade to a larger one if you feel the need.

Any any rate a cooler is a good idea if you tow or crawl with larger tires. Offroad using 4Lo reduces the strain on the transmission a ton when crawling along.
__________________
andries
K9BDG

2019 Low Rider
bulldog is offline   Reply With Quote
Unread 09-08-2016, 04:27 PM   #17
Chrisx
Driver
 
Chrisx's Avatar
 
Join Date: Oct 2010
Location: Denver
Posts: 254
Default

I have the V8 and rather than upgrade I added a second. Easy enough to do for extra cooling and peace of mind.
Chrisx is offline   Reply With Quote
Unread 09-08-2016, 07:53 PM   #18
BlackWorksInc
Senior Driver
 
BlackWorksInc's Avatar
 
Join Date: Mar 2011
Location: Bend, OR
Posts: 700
Default

Never really had issues with mine, but I have thought of going bigger later down the line.
__________________
BlackWorksInc is offline   Reply With Quote
Unread 09-10-2016, 03:24 PM   #19
eskimochaos
Driver
 
Join Date: Aug 2008
Location: The Moon
Posts: 193
Default

Mine consistently runs ambient + 80F when on the highway with the torque converter locked. Year round, it's 80F hotter than the outside temperature gauge when fully warmed up.

In traffic, I have seen a high of 200F downstream of the torque converter. The fluid in the pan never exceeds 185F.

My experience shows that transmission temperature did not noticeably increase from stock setup to 3" lift and 275s.
eskimochaos is offline   Reply With Quote
Unread 09-10-2016, 03:29 PM   #20
Chrisx
Driver
 
Chrisx's Avatar
 
Join Date: Oct 2010
Location: Denver
Posts: 254
Default

This brings up an old question that I've been asking - where is the Scan Gauge reading from, pan or downstream of the torque converter or ?
Chrisx is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
monitoring A340 transmission temp 2003 V6 matt16 4th Gen 4Runner & Hilux Surf 0 02-16-2016 11:50 PM
Transmission fluid purge?? zonzin 4th Gen 4Runner & Hilux Surf 7 07-01-2013 11:35 AM
2006 4.0L Transmission cooler installation, with some pics. Mike P. Mechanical 1 09-19-2011 11:25 AM
2006 4.0L Transmission cooler installation, with some pics. Mike P. 4th Gen 4Runner & Hilux Surf 4 09-19-2011 11:25 AM
WS Transmission Fluid stands for... CJ3Flyr Maintenance 3 08-03-2009 09:47 AM


All times are GMT -7. The time now is 07:28 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright 2005-2013 Toyota120.com