ZL1 1LE M6 Hot trans temp at track

Junkyardspecial · 09-25-2019, 07:41 AM

Ive been tracking my ZLE for a few months now and done all the fluid exchanges except the transmission so far. Yesterday at the track as I was scrolling thru my temps and pressure gauges to check the status of the car, i noticed the Trans temp was pinned at 300 degrees. This was after a 30 min session. There was no odd feelings or hard shifts, everything felt great. Ambient temp was about 84 degrees and my engine oil temp was actually about 10 degrees lower than usual.

Im thinking a fluid change can help remedy this, as Im sure the thermal capacity of the old fluid is pretty much toast. Has anyone else run into this before? Also the oem fluid is GM part 88861800?

Aliveguy5 · 09-25-2019, 07:55 AM

My temps stay around 230-240 in an A10 with those temps and I run it hard. I'd say something is off.

Vtor_ZL1 · 09-25-2019, 08:43 AM

You may want to look int 2019 under belly scoops that dump air into rack / trans area.

Stingray_2014 · 09-25-2019, 09:54 AM

Sensor perhaps? Something tells me you would feel it if the fluid was really over 300 degrees in there or something would break.

Junkyardspecial · 09-25-2019, 09:59 AM

Quote:

Originally Posted by Stingray_2014

Sensor perhaps? Something tells me you would feel it if the fluid was really over 300 degrees in there or something would break.

That was another thought. Fluid has at the most 10k miles on it and only 4 or 5 hours of track use. I dont see how it has failed so quickly, Car drives fine at "300" as it does on a cold start. Ill be getting under it today to check it out.

Mark R · 09-25-2019, 10:57 AM

I would be looking at the temp sensor also, but given 10K miles and some track use, a fluid change is called for anyway, IMHO.

tstodii · 09-25-2019, 11:13 AM

Squatch · 09-26-2019, 09:20 AM

^^ LoL !

Junkyardspecial · 09-30-2019, 10:13 AM

Changed the fluid with fresh AC Delco and temps have dropped a good amount but still runs very hot. 260-275 range.

SWZL11LE · 09-30-2019, 11:08 AM

This might be a long shot, but do exhausts usually have heat shielding around the area of the transmission?

I know you got an aftermarket exhaust, perhaps maybe heat shielding is missing which might be contributing to the higher temps the transmission is being subjected to?

Russell James · 09-30-2019, 01:19 PM

Quote:

Originally Posted by Junkyardspecial

Changed the fluid with fresh AC Delco and temps have dropped a good amount but still runs very hot. 260-275 range.

Is that after a long track session? Or everyday driving?

Junkyardspecial · 09-30-2019, 01:58 PM

Quote:

Originally Posted by SWZL11LE

This might be a long shot, but do exhausts usually have heat shielding around the area of the transmission?

I know you got an aftermarket exhaust, perhaps maybe heat shielding is missing which might be contributing to the higher temps the transmission is being subjected to?

Thats my next guess, I might wrap the headers in wrap, or put heat tape on the trans to take some heat away from the pipes.

Junkyardspecial · 09-30-2019, 02:00 PM

Quote:

Originally Posted by Russell James

Is that after a long track session? Or everyday driving?

hard track day 20-30min session 90 degree ambient temps.

Everyday driving brings around 150 degrees

09-25-2019, 07:41 AM	#1
Junkyardspecial Drives: 2018 ZL1 1LE Join Date: May 2019 Location: South Florida Posts: 438	ZL1 1LE M6 Hot trans temp at track Ive been tracking my ZLE for a few months now and done all the fluid exchanges except the transmission so far. Yesterday at the track as I was scrolling thru my temps and pressure gauges to check the status of the car, i noticed the Trans temp was pinned at 300 degrees. This was after a 30 min session. There was no odd feelings or hard shifts, everything felt great. Ambient temp was about 84 degrees and my engine oil temp was actually about 10 degrees lower than usual. Im thinking a fluid change can help remedy this, as Im sure the thermal capacity of the old fluid is pretty much toast. Has anyone else run into this before? Also the oem fluid is GM part 88861800? __________________ Subscribe to my Youtube channel! https://www.youtube.com/c/Junkyardspecial Will buy your GoodYear Supercar 3R Take offs! Last edited by Junkyardspecial; 09-25-2019 at 08:25 AM.

09-25-2019, 08:43 AM	#3
Vtor_ZL1 Who Needs to KNOW? Drives: 18 ZLE Join Date: May 2018 Location: Left Side of the Moon Posts: 1,771	You may want to look int 2019 under belly scoops that dump air into rack / trans area. __________________ ing for grip. Are you in the NY/NJ/PA/CT region? Join us for autox fun at MetLife Stadium. HUGE lots, tons of runs. http://www.motorsportsne.com/

09-25-2019, 09:54 AM	#4
Stingray_2014 Drives: 2019 Camaro ZL1 Join Date: May 2019 Location: FL Posts: 50	Sensor perhaps? Something tells me you would feel it if the fluid was really over 300 degrees in there or something would break. __________________ 2019 Riverside Blue ZL1 M6, PDR

09-25-2019, 11:13 AM	#7
tstodii Drives: White 2015 Z/28 Join Date: Jul 2017 Location: Charleston SC Posts: 208	Attached Images

09-26-2019, 09:20 AM	#8
Squatch Camaro pilot Drives: 69 Camaro, 2014 ZL1 Join Date: Dec 2015 Location: Medford OR Posts: 299	^^ LoL ! __________________ 2014 ZL1 Camaro 1969 Camaro

09-25-2019, 07:55 AM	#2
Aliveguy5 Drives: 2017 Red Hot ZL1 Join Date: May 2015 Location: Metro Detroit Posts: 216	My temps stay around 230-240 in an A10 with those temps and I run it hard. I'd say something is off.

09-25-2019, 10:57 AM	#6
Mark R Drives: 2018 ZL-1 Join Date: Jan 2018 Location: Albuquerque Posts: 948	I would be looking at the temp sensor also, but given 10K miles and some track use, a fluid change is called for anyway, IMHO.

09-30-2019, 10:13 AM	#9
Junkyardspecial Drives: 2018 ZL1 1LE Join Date: May 2019 Location: South Florida Posts: 438	Changed the fluid with fresh AC Delco and temps have dropped a good amount but still runs very hot. 260-275 range. __________________ Subscribe to my Youtube channel! https://www.youtube.com/c/Junkyardspecial Will buy your GoodYear Supercar 3R Take offs!

09-30-2019, 11:08 AM	#10
SWZL11LE Drives: '19 ZL1 1LE Join Date: Feb 2019 Location: Miami Posts: 128	This might be a long shot, but do exhausts usually have heat shielding around the area of the transmission? I know you got an aftermarket exhaust, perhaps maybe heat shielding is missing which might be contributing to the higher temps the transmission is being subjected to?

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