AMG Transmission temperature?
Thread Starter
Member
Joined: Jan 2005
Posts: 178
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From: Orange County, CA
GLA250 4Matic, 911 Carrera S, R1250 GS Adv.
AMG Transmission temperature?
I've noticed that when the engine oil temperature rises, so does the transmission temperature. But the trans fluid takes much longer to reach its operating temp than the oil does (and way longer than the engine coolant). I imagine there's some kind of heat exchanger for the engine oil, maybe as part of the radiator, but what about the transmission? Is there a trans heat exhanger and/or a thermostat? What keeps the trans from overheating?
Member
Joined: Dec 2016
Posts: 136
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From: penn's woods USA
2019 AMG C43 Sedan
I've noticed that when the engine oil temperature rises, so does the transmission temperature. But the trans fluid takes much longer to reach its operating temp than the oil does (and way longer than the engine coolant). I imagine there's some kind of heat exchanger for the engine oil, maybe as part of the radiator, but what about the transmission? Is there a trans heat exhanger and/or a thermostat? What keeps the trans from overheating?
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[ 1 ] COOLING SYSTEM / COOLING / TRANS OIL COOLER / Trans cooler
Thread Starter
Member
Joined: Jan 2005
Posts: 178
Likes: 21
From: Orange County, CA
GLA250 4Matic, 911 Carrera S, R1250 GS Adv.
Thanks! I'll try to get familiar with that parts catalog. So there's a single dedicated cooler but no thermostat - it's always cooling. Haven't checked but presumably there's an overheat warning light in the inst. cluster.
The temp display that's in the cluster changes from blue (cold) to white when the fluid finally reaches its "warmed up" temp - don't know what that is, but it seems just fine.
I don't recall hearing any cautions about hard driving before the trans is warmed up but suppose any servos and valves could operate more sluggishly.
The temp display that's in the cluster changes from blue (cold) to white when the fluid finally reaches its "warmed up" temp - don't know what that is, but it seems just fine.
I don't recall hearing any cautions about hard driving before the trans is warmed up but suppose any servos and valves could operate more sluggishly.
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Joined: Feb 2008
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'20 GLC300 SUV
I actually started a thread on this a while back. I noticed the same thing. When I had my MCT-equipped W204 C63, the engine oil and transmission temperature would reach their normal operating temperatures at roughly the same time.
The transmission definitely takes a bit more time to warm up. Normal behavior. But the good thing is, heat is the enemy of the transmission.
Someone recommended to me starting out in S to help speed things along (without beating on it, of course).
The transmission definitely takes a bit more time to warm up. Normal behavior. But the good thing is, heat is the enemy of the transmission.
Someone recommended to me starting out in S to help speed things along (without beating on it, of course).
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Joined: Dec 2018
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C43 AMG
As a reference, on our Porsche GT3 theres written in the manual that the Trans. Temp shouldn't exceed 110 Degrees Celsius.
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
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Joined: Mar 2017
Posts: 1,026
Likes: 282
From: Omaha, NE
'16 AMG GTS, '21 AMG GLE53
As a reference, on our Porsche GT3 theres written in the manual that the Trans. Temp shouldn't exceed 110 Degrees Celsius.
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
MBWorld Fanatic!
Joined: Nov 2016
Posts: 1,527
Likes: 287
From: Toronto, ON
2021 Mercedes C63s AMG Coupe
As a reference, on our Porsche GT3 theres written in the manual that the Trans. Temp shouldn't exceed 110 Degrees Celsius.
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
In a Alpine A110 i testdrove the Company told me the Transmission shouldnt exceed 105 Degrees.
In our Mini JCW with Doubleclutch theres nothing written in the manual and asking around at different engineers that work at Mini they told us everything above 100 degrees should make us slowly "calm down" and that it gets dangerous above 110.
Asking the same Question at AMG for our C43 was basically the same, on the lower end every one i asked told us that if the Transmission Oil Temp is above 60 Degrees Celsius we're free to go hard on it.
Apparently its "the high temps that kill a Trans. not the lows".
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Junior Member
Joined: Feb 2019
Posts: 72
Likes: 27
From: Southern Ontario
2019 C43 Wagon
Noticed similar, the engine hits 70C and goes from blue to white fairly quickly, the transmission is a lot slower to heat up and never peaks as high (although only street driven).
I do think in Sport+ it gets a little more aggressive in the shifting and downshift crackles once the transmission has warmed up
What I have noticed, if I turn off and come back in 2 hours, the engine has given some heat to the transmission.... Engine has cooled, obviously from the 90C's, but the transmission has picked up 10C to be in the 70's. It makes sense, I've never had a car with a transmission temp gauge and seen it firsthand.
I do think in Sport+ it gets a little more aggressive in the shifting and downshift crackles once the transmission has warmed up
What I have noticed, if I turn off and come back in 2 hours, the engine has given some heat to the transmission.... Engine has cooled, obviously from the 90C's, but the transmission has picked up 10C to be in the 70's. It makes sense, I've never had a car with a transmission temp gauge and seen it firsthand.
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