02-13-2021, 10:03 AM | #1 |
Drives: 022 C8 Z51 Red Mist HTC Join Date: Feb 2021
Location: West Suburbs of Chicago
Posts: 200
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Why no eLSD on ZL1 Vert?
I purchased a lightly used (6,300 mi) 2020 ZL1 M6 Convertible yesterday, and I’m curious why doesn’t the convertible come with Electronic Limited Slip Differential like the ZL1 Coupe?
I was aware when I bought it that it didn’t have it (so no surprise) but I’m curious as to GM’s thinking behind not including it on the Vert? Do they think convertible drivers are less likely to drive aggressively, and thereby less likely to need it? Overall Cost (it’s pretty expensive)? They don’t think a convertible will be tracked? Has anyone driven both the coupe and convertible enough to notice how easily the Convertible gets squirrelly without eLSD? I’ve owned a C7 Z06 for years, so I’m comfortable with the engine power but living vicariously through you folks as I have literally not even test driven my new ZL1 yet since it is stupid cold and snowy here in the frozen tundra of Illinois. |
02-13-2021, 10:11 AM | #2 | |
Drives: 2016 2SS Convertible Join Date: May 2012
Location: St. Louis, MO
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02-13-2021, 10:18 AM | #3 |
Drives: 2018 Camaro ZL1 Join Date: Aug 2018
Location: Georgia
Posts: 1,366
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Only answer I've ever read was because the convertible aspect takes up space and couldn't accommodate the eLSD. Sounds weird but I've never seen the underside of a convertible ZL1 where the diff is to see how much space is or isn't there.
GM also made have the convertible smaller sway bars too. Honestly, I think they did it all because the ZL1 was advertised as a track beast but they didn't want the convertible to be so they toned it back a little. |
02-13-2021, 10:28 AM | #4 |
Drives: 2019 2SS Camaro Join Date: Apr 2012
Location: Al
Posts: 828
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I havs the ss and it does not have the rear dif cooler or the aux radiators. nither right or left. Those have nothing to do with braceing ect. I think they figure it will not be tracked. I guess maybe to save a little weight but probly money.
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02-13-2021, 12:33 PM | #5 | |
Drives: Wild Cherry LT1 Join Date: Dec 2016
Location: Massachusetts
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This is the reason. As well, when you look under the car, the exhaust has been flattened in the diff area. It’s been proven to have no affect on performance. This flattening carries over to all Gen 6’s, even though it was done specifically for vert clearances. The vert differential has heat exchanger, unlike the base SS’s. I can’t speak to the back end getting squirrelly. I have a lot of respect for the power on tap, so I’m pretty careful. |
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02-13-2021, 01:19 PM | #6 | ||
Drives: 022 C8 Z51 Red Mist HTC Join Date: Feb 2021
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As for respect, I learned on my C7 Z06, even with all the nannies, that this engine gives you plenty of rope to hang yourself with. If it’s raining, or slightly cold Out, I put her in weather mode. I think it’s called “snow / ice” on the ZL1. |
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02-13-2021, 01:36 PM | #7 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
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Maybe a liability issue too with the ZL1 verts. Chevy probably didn’t want anyone tracking their convertible because of possible rollovers. I know I would hate to be in a rollover crash with a convertible if you don’t have a roll bar or cage over your head.
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02-13-2021, 04:37 PM | #8 |
Drives: 022 C8 Z51 Red Mist HTC Join Date: Feb 2021
Location: West Suburbs of Chicago
Posts: 200
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I’m 90% certain that the C7 Z06 (including convertible) has eLSD standard.
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02-13-2021, 05:24 PM | #9 | |
Drives: 2018 Camaro ZL1 Join Date: Aug 2018
Location: Georgia
Posts: 1,366
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It's not really needed but GM likes to do it. |
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02-13-2021, 05:40 PM | #10 |
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
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I couldn’t get rid of it fast enough.
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02-13-2021, 05:42 PM | #11 | |
Drives: Wild Cherry LT1 Join Date: Dec 2016
Location: Massachusetts
Posts: 1,923
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https://www.camaro6.com/forums/showt...=519734&page=3 |
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02-14-2021, 02:01 AM | #12 | ||
Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 4,973
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The trunk floor steel in the vert and coupe are identical as far as I can tell, seems like a universal stamping for all 6th gens. There is probably enough room for them to have made it work if they wanted to. All the vert's hydraulics/pump hardware for the top is behind the back seat above the fuel tanks (not under the trunk). Probably more of an issue with the ELSD being larger than the regular LSD. The top pic is a crappy shot of the back (shot looking toward the back from the front), but you can see the rear X-brace goes above the exhaust crimps and bolts to a brace behind the diff. So at first glance it should be easy enough to install another diff that fits the car [edit]. The middle pic is a much better shot of the ELSD on a coupe from another forum member's car. There's a control box at the rear where the x-brace body mount would be. Also the ELSD seems a bit larger (lower) so the body mount might need to be lower and have clearance issues. [Edit: added 3rd pic with a better rear shot from my car of the Z vert LSD and bracing, showing cooling lines.] It was probably more of a "do we want to spend another month and multiple tends of thousands of dollars developing a fix to the problem with packaging the ELSD with the X-brace, or just tell them there wasn't room?" kind of engineering decision Al O. had to make. So what Mark114 said certainly seems to be the case here. Last edited by Gunkk; 02-19-2021 at 08:36 AM. Reason: Added a better pic of my car, fixed an error. |
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02-14-2021, 03:26 AM | #13 |
Drives: 2019 2SS Camaro Join Date: Apr 2012
Location: Al
Posts: 828
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The vert body is different. the brace bolts to an extra body brace that is where the cross member is on the coupe. Vert does not have a cross member, thats where lots of people jack the rear up from. Theres no reason why they could not have added the dif cooler but they did not. The esld i have no idea. Never seen one.
Exampel. If you pull the rocker panel you will see very quickly their is a major difference in the body shell. The coupe has an indention and goes back toward the car all along the botton from wheel well to wheel well, their under the rocker. The vert goes another 1inch at least stright down more square. The rocker from the coupe will not fit the rocker for the vert. This greatly complated my install of the alkey control, pump. Not as much room. I had to make another custom braket and trimerd the pump some. Not pretty but it works with about 10 thou clearence from the fender lol. |
02-14-2021, 03:48 AM | #14 | |
Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 4,973
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FWIW, the ZL1 vert has a diff cooler (heat exchanger via recirculated trans fluid). SS vert does not, as I recall. |
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