06-24-2015, 09:28 AM | #15 |
Track > 1/4 Mile
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Good point, the track I was on was small and technical with only two (small) straights and I was basically keeping the car in one gear the entire time and would run it to red line on the straights. I suspect if I short shifted instead of going to red line that would help the heating issue some.
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07-02-2015, 05:21 AM | #16 |
Drives: 2015 2LT Z51 Black C7 Join Date: Jun 2015
Location: El Paso, TX
Posts: 13
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Why would paddle shifting not overheat the car when auto mode will? Its all the same components. Is it something in the tune with the paddle shifting? Also would a lower 160 temp thermostat help? I know this has always been argued but I put one on my C6 and it really did lower the avg temp, and this was in Texas heat.
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07-02-2015, 11:28 AM | #17 |
Drives: 1974 & 2014 Corvette Stingrays Join Date: Mar 2013
Location: Troy, Mo
Posts: 623
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A couple things I've recently found for you auto trans guys with overheat issues. The Z06 trans cooler will fit behind the Stingray fascia with no mods to the bodywork, according to GM statements about possible Z06 Performance Parts upgrades for Stingrays (theze upgrades also include brakes, suspension and more). Also, the Z06 fender-top ducts flow 35% more air than the Stingray pieces all by themselves. These upgrades might help some of you out.
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'74 Stingray coupe, heavily modified, as seen in August 2011 VETTE magazine, 2014 Stingray Z51 #196, ordered 02/11/13, built 08/29/13, Museum Delivery 10/04/13, driven daily!
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07-02-2015, 11:21 PM | #18 | |
Drives: 3LT Z51 Join Date: Dec 2013
Location: Dallas
Posts: 52
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Quote:
I'm taking the car to the dealer so we'll see what he says. I'm hoping that it's just a faulty sensor or that the fluid is burnt/ineffective and changing the fluids will make everything better. I've tracked the car several times without incident, but now literally 18 minutes is all I have in a session and then like clock work it'll go into limp mode. As far as paddle shifting, all I can tell you is that at the Ron Fellows Driving School they made all the autos paddle shift because they said that if you didn't it would overheat the engine. I don't have any proof of that. I do know that, at least the way I drive, the auto shifts way more than I do. |
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07-03-2015, 06:04 PM | #19 |
Drives: 1974 & 2014 Corvette Stingrays Join Date: Mar 2013
Location: Troy, Mo
Posts: 623
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Its true the Z06 cooler is physically larger, but it sits at an angle behind the fascia, and will fit behind a Stingray fascia with no body mods - at least according to some info posted by GM. I haven't seen anyone make the switch, so don't know for 100% sure. I hope the dealer finds the issue - I'd be really annoyed if I had that kind of headache. Thankfully, my M7 doesn't overheat.
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'74 Stingray coupe, heavily modified, as seen in August 2011 VETTE magazine, 2014 Stingray Z51 #196, ordered 02/11/13, built 08/29/13, Museum Delivery 10/04/13, driven daily!
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08-29-2015, 09:34 PM | #20 |
Drives: 3LT Z51 Join Date: Dec 2013
Location: Dallas
Posts: 52
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Ok, so I could only go about 15-18 minutes of hard driving on the track before going into transmission limp mode.
I took it to the dealer who said that there were no codes saying that something was wrong, so he had nothing to fix. I told him to flush the transmission, hoping new fluids would improve the durability. It worked a little. I could go about 20 minutes before overheating. Still not enough to make a full session despite avoiding the redline like the plaque. Finally, I break down and figure that since GM could care less about this obvious, well-documented problem, I might as well fix it myself. I got an aftermarket cooler (larger than the Z06), installed that, and moved the OEM cooler to over the leafspring, running 2 coolers. I swapped out the pan for a larger capacity pan increasing the transmission fluid capacity by about a gallon. I went ahead and upgraded the radiator too, so that absolutely nothing would overheat. Today, I ran a couple of full sessions in ambient temperature of 97 degrees (103 per the stingray ambient thermometer) and the max transmission temperature was only about 225. One caveat: it was a track I had never ran before, so I was definitely going much slower, and shifting a lot less. I definitely wasn't pushing the car and never redlined it. Usually my mpg is about 7 or 8, but today it was 10.5, so clearly I wasn't driving her very hard. But, no limp mode at all. |
08-31-2015, 05:36 PM | #21 | |
Speed Freak
Drives: 2013 ZL1 Camaro, 2016 Camaro SS Join Date: Jun 2013
Location: Ardmore, OK
Posts: 2,637
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Quote:
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq
2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date. |
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08-31-2015, 08:05 PM | #22 |
Drives: 3LT Z51 Join Date: Dec 2013
Location: Dallas
Posts: 52
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It should sound like LG, because that's exactly who did the work. I opted for their Stage III Transmission Cooling Kit https://www.lgmotorsports.com/corvet...d-cooling.html
and changed the radiator as well. So far, so good. 30k on stock pads sounds pretty good. I had to change mine at about 6k. Let me know what you pads you choose next. |
05-14-2016, 09:14 PM | #23 |
Drives: 2016 Arctic White Z51 Join Date: Apr 2016
Location: Oregon
Posts: 3
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Soooo ... I've had my 2016 Z51 with A8 for a while now so I thought I'd go ahead and post up. I've had zero overheating problems so far. Shifts are the smoothest I've ever had in any auto trans car and are super fast at WOT. Crossing my fingers that things continue this way.
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05-15-2016, 01:43 PM | #24 | |
Speed Freak
Drives: 2013 ZL1 Camaro, 2016 Camaro SS Join Date: Jun 2013
Location: Ardmore, OK
Posts: 2,637
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Quote:
__________________
2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq
2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date. |
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05-20-2016, 10:56 PM | #25 | |
Drives: 2016 Arctic White Z51 Join Date: Apr 2016
Location: Oregon
Posts: 3
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Quote:
I've had no problems on track. |
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06-27-2016, 01:55 AM | #26 |
Drives: 2016 Arctic White Stingray Join Date: Jun 2016
Location: Portland, OR
Posts: 18
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Didn't they implement a 'fix' for the overheating A8 transmissions with the 2016 model year?
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06-28-2016, 08:23 AM | #27 |
Drives: '16 Z06 7 Spd, 2024 High Country HD Join Date: May 2015
Location: Kansas City area
Posts: 442
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I'm pretty sure it was resolved. Here's a portion of an e-mail from Tadge dated May 2015.
Although there are very few complaints from Z51 customers on cooling issues, we are looking at taking some of the learnings and hardware from the Z06 and making them available on the Stingray. For example, the front-mounted supplemental trans cooler developed for the Z06 automatic will be included in the Z51 package for automatic coupes starting in the 2016 model year. |
07-21-2016, 09:40 AM | #28 |
Drives: '16 Z06 7 Spd, 2024 High Country HD Join Date: May 2015
Location: Kansas City area
Posts: 442
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I just returned from a High Performance Driving Class in Nevada. They had Z51 & Z06 vehicles in both auto and manual, all '15's & 16's. Cars were stock except for radios and heavier oil and air temps were 106-107. Training was a rotation between classroom and track, approx. 40-50 min sessions each. During the 2 day class none of the autos overheated. The reason given by the instructors is that they recommend the cars be shifted at the peak HP curve, approx. 5500RPM, since you really do not gain anything over that shift point. We also ran a cool down lap at the end of each session at 40-50mph in 4th gear.
We also ran air conditioning at max. Last edited by h422694; 07-21-2016 at 02:28 PM. |
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