Originally Posted by Toilets

If your car is at all modified please be careful using launch control. My wife was driving the car and tried launch control and we snapped an axle on the street. Because it was modified with Headers, GM denied the warranty claim on it and we had to front the bill.

Originally Posted by Dane@LGmotorsports

Did you end up replacing with stock or DSS?

Originally Posted by jagamajajaran

I assume you have more than 500 miles on the car?

Mine wasn't going to 3500 at first because I wasn't pressing the brake down hard enough. But if you're not in the correct mode for launch control, it won't rev very high either. Check the following to see if there's anything you're missing...

From the owners manual...

Launch Control (Sport and Track Mode Only) A Launch Control feature is available, within Competitive Driving Mode or PTM, on all vehicles to allow the driver to achieve high levels of vehicle acceleration in a straight line. Launch Control is a form of TCS that manages tire spin, and transmissions clutch, while launching the vehicle. This feature is intended for use during closed course race events where consistent zero to 60 and quarter mile times are desirable. Launch Control is only available when the following criteria are met: . Competitive Driving Mode or any of the PTM Modes are selected (if equipped). . The vehicle is not moving. . The wheels and steering wheel are pointing straight. Launching the Vehicle . Ensure the vehicle is in Competitive Driving Mode or any of the PTM modes. . The brake pedal must be firmly pressed to the floor, equivalent to a panic brake event. . While maintaining the brake pedal, the accelerator pedal is rapidly applied to wide open throttle. (If the vehicle rolls due to wide open throttle, release the throttle, press the brake pedal more firmly, and re-apply the accelerator to wide open throttle.) The Launch Control feature will initially limit engine speed as the driver rapidly applies the accelerator pedal to wide open throttle. Allow the engine rpm’s to stabilize. A smooth, quick release of the brake pedal, while maintaining the fully pressed accelerator pedal, will manage tire slip and transmissions clutch. After the vehicle is launched, the system continues in Competitive Driving Mode or PTM. Competitive Driving Mode, PTM, and Launch Control are systems designed for a closed course race track and not intended for use on public roads. The systems are not intended to compensate for lack of driver experience or familiarity with the race track. Caution The new vehicle break-in period should be completed before using the launch control feature, otherwise performance will be limited and damage may occur to the powertrain/engine. See New Vehicle Break-In 0 162.

Originally Posted by Toilets

stock as the the GM reps brought the part down and the car was already a part when they called me into the dealership to meet with me. We tested it at Rd Atlanta with Hoosiers on and it was fine after. However I nor my wife will probably never use launch control again until we replace them from DSS.

in case anyone wants to know, parts and labor was 790. Plus fluids, shop materials and all came to like 908.

as an FYI- they were going to Warranty block the entire car if it was tuned. It isn’t of course so the warranty is thankfully still in tacked. They just won’t cover that part. Just a public service announcement as they are taking these claims seriously. You will definitely pay to play with this car. Lol

Originally Posted by StickerDick

So... If I'm understanding what I've read, and what I saw you doing on the video, you don't have to pull in the two paddle shifters on the steering wheel? I thought you used the paddle shifters and after you pressed the brake pedal, got it to 3500 rpms, you could release the brake and then once you released the paddles, the car launched? Is that not the way it works? I just am over 500 miles today, and I wanted to try my launch control.

Originally Posted by jagamajajaran

Correct...you do not have to pull back the two paddles to use launch control. Just put it in Drive, hold the brake all the way to the floor, put the gas to the floor, then release the brake.

Originally Posted by StickerDick

so... If I did use the paddles, pressed the brake and gas, but not release the paddles when I release the brake, would that not in effect act like I had the clutch engaged? My reason for asking is my eye hand coordination is quicker than my foot

Originally Posted by StickerDick

OK... I tried it the normal way, got a 3.0 flat, i tried it where I pulled the paddles in and stepped off the brake and the RPM's went to the redline, let off the paddles and the tires broke loose big time, 0-60 in 3.3, but it seemed a little harsh on the tranny, so I think that was a fail for sure. I'll just learn to get faster with my foot work.

Originally Posted by jagamajajaran

Thanks for the update...a 3.0 start is really good

Originally Posted by StickerDick

OK... I tried it the normal way, got a 3.0 flat, i tried it where I pulled the paddles in and stepped off the brake and the RPM's went to the redline, let off the paddles and the tires broke loose big time, 0-60 in 3.3, but it seemed a little harsh on the tranny, so I think that was a fail for sure. I'll just learn to get faster with my foot work.

Originally Posted by StickerDick

I appreciate the advice and encouragement, but as you know... I didn't do anything but push a couple of buttons, press the brake and gas pedal and pray I did not brake an axle..... I will be investing in the DSS axles I think.

Originally Posted by LJT

question: if stronger axles are installed, are we moving the weak point to the Tremec DCT?

Originally Posted by Blade2382

Stupid question.

Just ordered a ‘21 non z1....will I still have launch control available to play with?

Originally Posted by RapidC84B

Yes... they all have it.