transmission fluid temperature by scangaugeII?

[Jas2171617]

Hi!
I just flushed transmission fluid on my T4R on 70k miles, I put on hayden 679 Amazon.com: Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler: Automotive I used Maxlife ATF and I use inferet temperature gun to check trans fluid temp, some how it isn't accurate. Does anyone have the sangaugeII ScanGaugeII : Linear Logic - Home of the ScanGauge on the 4th gen T4R have the trans oil temps range?
I am still learning, thank you very much.

 

[Jeremy556]

Why don't you use the temperature check mode by shorting the pins on the OBD2 connector?

Is that fluid WS compatible?

 

[Jas2171617]

the fluid is compatible.
I did the flush few days ago, I am driving on it now, because the gun temp somehow unsure trans oil temp, that why I ask for the range of it.

 

[Oneluv13T4R]

Sure its compatible for a vehicle you dont care about, or has an old worn out tranny thats on its last leg and your just wanting to keep alive.
Its just full of additives, sealants for that reason. Why its called "MAXLIFE"...

Normal Transmission Temps Range 140*F - 200*F
Is why temp gun is fluctuating from variables of load.

Just my 2 cents
If want your tranny to continue performing and lhave a healthy long life, no maxlife

Do yourself a favor
Stick with Toyota fluids, Amsoil, Mobile 1, etc.


2003
253,000 miles
never a engine or tranny issue
just regular TLC

 

[Jas2171617]

you guy have no actual scangaugeII temp reading?

 

[having fun]

I can't remember exactly what the temp range was.... I do have one mounted on my ride, and personally, I WOULDN'T USE IT FOR THAT PURPOSE. I tried it once and it dump too much out on check mode temp range it was showing, refilled and did the OB2 temp check mode.

Others here gave you very sound advice and warnings, I would take heed of there advice and mine.

 

[07V8]

Your transmission is not designed for ANYTHING but Toyota World Standard fluid.

I have pan and torque converter temperatures on my Scangauge. There are codes floating around these forums.

 

[sonerick]

I use my scangauge to monitor trans temps. Temp range varies drastically depending on outside temps and load. On a normal 70*F day driving on a flat road, it's usually somewhere around the 140*F mark. On a hot day driving through the mountains, I have seen it get as high as 220*F.

This is on a 2005 V6 with *no* external trans. cooler.

 

[sonerick]

Your transmission is not designed for ANYTHING but Toyota World Standard fluid.

I have pan and torque converter temperatures on my Scangauge. There are codes floating around these forums.

I use one code for trans. temp. I wasn't aware you could get both pan and TC temps. Do you have any more info on this?

 

[Jas2171617]

I use my scangauge to monitor trans temps. Temp range varies drastically depending on outside temps and load. On a normal 70*F day driving on a flat road, it's usually somewhere around the 140*F mark. On a hot day driving through the mountains, I have seen it get as high as 220*F.

This is on a 2005 V6 with *no* external trans. cooler.

thank you for this, it is all what I need. because the purpose it to make sure the Hayden 679 tranny cooler work as amount location.

 

[progress4m]

Agreed with other replies to use Toyota WS fluid only!

On my “scan gauge II” temp will vary a lot: from any ambient all the way to 200 ranges (highest I have seeing was 204 F when puling the boat on 100 degrees day-of Texas summer);
Note: the highest temp is there when you move very slow (with a load like a boat) in traffic, ramp etc. if I am starting to move (even 20-30 miles an hour) temp drops to 180-190;

On the average daily drive it is about 120-140 F;

Another thing to know (and that explains such a big range in temp swing) the temp you see on the “scan gauge II” is temperature of the torque converter, not the trany pan; obviously that is another reason not to use that temperature reading for trany fluid level check: “check mode” by shorting the pins on the OBD2 connector is the way to go;

 

[Martinjmpr]

I've been running an SGII since I got my 4runner. I do have an external cooler and frequently pull a ~2000lb travel trailer.

On relatively flat ground temps run 150 - 190 or so when not pulling the trailer. 170-200 on flat ground with the trailer.

Once I start heading into the mountains the temps raise considerably. I'm pretty good about shifting the transmission down to 3 or even 2 in some cases when climbing a steep hill (we have a lot of those in Colorado.)

Highest temp so far was about 265, that was under the worst possible circumstance: Climbing out of Death Valley over Emigrant Pass in late July. Outside temp was 115 and I was pulling a trailer (although not as big a trailer as I have now.)

Generally speaking even when climbing multiple hills in CO I can usually keep it under 220.

Best thing you can do to keep your transmission cooler is to not put it into D (Overdrive.) When I tow I always keep it in 4, even on downhills and on flat ground. Interestingly, I get better MPG in 4 than I do shifting it back and forth between 4 and D. I took it to the Western Slope last weekend (Grand Junction area) crossing 2 passes that were more than 10,000' (The Eisenhower Tunnel and Vail Pass) and my MPG was a surprisingly respectable 13 - 14 while pulling the trailer.

 

[ben550]

I've been running an SGII since I got my 4runner. I do have an external cooler and frequently pull a ~2000lb travel trailer.

On relatively flat ground temps run 150 - 190 or so when not pulling the trailer. 170-200 on flat ground with the trailer.

Once I start heading into the mountains the temps raise considerably. I'm pretty good about shifting the transmission down to 3 or even 2 in some cases when climbing a steep hill (we have a lot of those in Colorado.)

Highest temp so far was about 265, that was under the worst possible circumstance: Climbing out of Death Valley over Emigrant Pass in late July. Outside temp was 115 and I was pulling a trailer (although not as big a trailer as I have now.)

Generally speaking even when climbing multiple hills in CO I can usually keep it under 220.

Best thing you can do to keep your transmission cooler is to not put it into D (Overdrive.) When I tow I always keep it in 4, even on downhills and on flat ground. Interestingly, I get better MPG in 4 than I do shifting it back and forth between 4 and D. I took it to the Western Slope last weekend (Grand Junction area) crossing 2 passes that were more than 10,000' (The Eisenhower Tunnel and Vail Pass) and my MPG was a surprisingly respectable 13 - 14 while pulling the trailer.

Forgive my ignorance but when putting it in 4 instead of D, does that keep it using gears 1-4 only or is it locked in 4 preventing it from downshifting (Cruise control)?

 

[Gdmeadors]

Why would the temp be different in the pan than it is in the torque converter? I used the scan gauge to measure temp for checking fluid level and have had no problems. Fluid temps should be uniform throughout transmission if it is properly warmed up. Right?

 

[07V8]

Why would the temp be different in the pan than it is in the torque converter? I used the scan gauge to measure temp for checking fluid level and have had no problems. Fluid temps should be uniform throughout transmission if it is properly warmed up. Right?

No. The TC will always be warmer when unlocked because that is where the shearing occurs.

 

[Martinjmpr]

Forgive my ignorance but when putting it in 4 instead of D, does that keep it using gears 1-4 only or is it locked in 4 preventing it from downshifting (Cruise control)?

No, the transmission can still shift it just can't shift into OD.

D = 1-5
4 = 1-4
3 = 1-3
2 = 1-2
L = 1st gear only.

What I've noticed by rigorously watching the TFT display (Trans Fluid Temperature) is that the more the transmission shifts itself, the hotter it gets. If I'm climbing a steep hill I try to shift it down to 3 before the trans automatically shifts down. This keeps the temp from rising as much as if I just let it shift.

 

[having fun]

/\/\/\ Spot on post there. The same I have been doing and experienced.

 

[wnelax04sr5]

does anyone have the x codes for tranny pan temps for the v6? I've got mine set on the torque converter.

FWIW, i see usually between 150 and 170 normal driving, towing I'm around 180, and on hot days when its shifting a lot I've seen as high as 215, but once the torque converter locks up it drops straight down

 

[Martinjmpr]

does anyone have the x codes for tranny pan temps for the v6? I've got mine set on the torque converter.

FWIW, i see usually between 150 and 170 normal driving, towing I'm around 180, and on hot days when its shifting a lot I've seen as high as 215, but once the torque converter locks up it drops straight down

Is there more than one transmission temp display on the SGII? If there is I'm not aware of it.

 

[sonerick]

Theoretically, you should be able to use the scangauge for the trans fluid level check if you start with a cold truck and let it idle until you reach operating temp. There should be no major variability in temperature as you are not shifting gears, which is what causes TC and pan temps to vary. Am I wrong here?