🌡Transmission temp rise before Oil temp? C63S
Thread Starter
Super Member
Joined: Jan 2020
Posts: 546
Likes: 228
From: Sydney
C63 S Coupe
🌡Transmission temp rise before Oil temp? C63S
Trans hit about 92c/197f in Sport mode and it rose a bit higher than my engine oil temp........... which I thought was odd because I usually only see the engine oil temp rise first with the trans temp trailing behind.
It never got higher than this and after driving normal the temps settled down.
Have you ever seen your transmission temperature rise first......... with your engine oil temps trailing behind?
Trying to mentally prepare myself for another big repair bill 😒😒😒
Thanks...
George Lisciandro
Senior Member
Joined: Jan 2014
Posts: 479
Likes: 122
From: Raleigh, NC
2021 C63S Coupe
Trans hit about 92c/197f in Sport mode and it rose a bit higher than my engine oil temp........... which I thought was odd because I usually only see the engine oil temp rise first with the trans temp trailing behind.
It never got higher than this and after driving normal the temps settled down.
Have you ever seen your transmission temperature rise first......... with your engine oil temps trailing behind?
Trying to mentally prepare myself for another big repair bill 😒😒😒
Thanks...
George Lisciandro
I would agree that I am always waiting on my transmission temp to warm up after the engine oil - it has 100% of the time lagged behind from a cold start (which makes sense). Was your experience from a cold start? Additionally, I usually wait for both temps to turn white (warmed up) prior to taking it out of comfort mode most times, however If I do put it to another mode it would be sport, and I drive it respectfully until warmed.
Last edited by djprov431; May 16, 2021 at 12:38 PM.
Thread Starter
Super Member
Joined: Jan 2020
Posts: 546
Likes: 228
From: Sydney
C63 S Coupe
I would agree that I am always waiting on my transmission temp to warm up after the engine oil - it has 100% of the time lagged behind from a cold start (which makes sense). Was your experience from a cold start? Additionally, I always wait for both temps to turn white (warmed up) prior to taking it out of comfort mode most times. If I do put it to another mode it would be sport, and I drive it respectfully until warmed.
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
Trans hit about 92c/197f in Sport mode and it rose a bit higher than my engine oil temp........... which I thought was odd because I usually only see the engine oil temp rise first with the trans temp trailing behind.
It never got higher than this and after driving normal the temps settled down.
Have you ever seen your transmission temperature rise first......... with your engine oil temps trailing behind?
Trying to mentally prepare myself for another big repair bill 😒😒😒
Thanks...
George Lisciandro
Senior Member
Joined: Dec 2017
Posts: 308
Likes: 71
From: Charlotte, NC
17 C63S Coupe PTG1000
Trans always beats engine to operating temp. Even highly modified with CSF’s 3 piece coolers, PTG turbos etc etc. Modalworks split trans cooling kit and upgraded trans thermostat arrive this week, so not sure how that’s going to change the dynamic once installed - but I’ll report back.
By the way, even with the supporting cooling mods I have in North Carolina heat, I still hit upper 190’s, even 200+ F in trans temps when doing back to back WOT pulls. It’s about how fast the cooling system reduces the heat soak to optimal operating temps is why you upgrade to higher performing products. Now, with the split/divorced trans cooling system from modalworks, that may bring operating temps down and stabilize those numbers even more. We will soon.
By the way, even with the supporting cooling mods I have in North Carolina heat, I still hit upper 190’s, even 200+ F in trans temps when doing back to back WOT pulls. It’s about how fast the cooling system reduces the heat soak to optimal operating temps is why you upgrade to higher performing products. Now, with the split/divorced trans cooling system from modalworks, that may bring operating temps down and stabilize those numbers even more. We will soon.
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Thread Starter
Super Member
Joined: Jan 2020
Posts: 546
Likes: 228
From: Sydney
C63 S Coupe
Trans always beats engine to operating temp. Even highly modified with CSF’s 3 piece coolers, PTG turbos etc etc. Modalworks split trans cooling kit and upgraded trans thermostat arrive this week, so not sure how that’s going to change the dynamic once installed - but I’ll report back.
very lucky to hear from someone with a lot of experience
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Senior Member
Joined: Dec 2017
Posts: 308
Likes: 71
From: Charlotte, NC
17 C63S Coupe PTG1000
@George_1992 - following up, after having the split cooling system installed, I confidently say that this thing is the real deal. I saw my cruising trans temp lower 30*F. After doing back-to-back 60-130 hits, I saw a max temp of 185*F. And you have to remember, I am running big turbos with higher boost than stock. Before the cooler, I would get above 200*F with just a few pulls. And the car would pull power.
If you are modded, and have heat soak challenges, this upgrade is a no-brainer.
If you are modded, and have heat soak challenges, this upgrade is a no-brainer.
Thread Starter
Super Member
Joined: Jan 2020
Posts: 546
Likes: 228
From: Sydney
C63 S Coupe
@George_1992 - following up, after having the split cooling system installed, I confidently say that this thing is the real deal. I saw my cruising trans temp lower 30*F. After doing back-to-back 60-130 hits, I saw a max temp of 185*F. And you have to remember, I am running big turbos with higher boost than stock. Before the cooler, I would get above 200*F with just a few pulls. And the car would pull power.
If you are modded, and have heat soak challenges, this upgrade is a no-brainer.
If you are modded, and have heat soak challenges, this upgrade is a no-brainer.
Ps thanks norm for reporting back bud
George
Senior Member
Joined: Dec 2017
Posts: 308
Likes: 71
From: Charlotte, NC
17 C63S Coupe PTG1000
This is what I needed to hear!!! Going to order mine did you have to drain the full cooling system to install the split trans cooler? I was actually going to order the Modalworks 3-piece cooler for M177 and the split trans cooler too. Do you think thats overkill? Only running 600hp stage 1 tune with very minor mods here but heatsoak killing my car after 2 WOT pulls car is so sluggish!!!......
Ps thanks norm for reporting back bud
George
Ps thanks norm for reporting back bud
George
Last edited by noremaC; Aug 20, 2022 at 05:56 PM.
