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Old 01-23-2020, 05:33 AM   #15
Tim M

 
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The ZLE trans (6th gear) is why it has a higher topspeed than a regular ZL1 (190+ vs 175 mph).

Interesting my stock SS 1LE matches topspeed on a regular ZL1 - completely gearing related.
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Old 01-23-2020, 06:16 AM   #16
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Originally Posted by mlee View Post
You have the ratios backwards. The A1Z / ZL1 1LE gets the MH3 which has the 0.68 6th. Funny how the EPA rules for fuel economy as both the regular M6 ZL1 and a M6 ZL1 1LE show the same fuel economy rating. Which is no where true for a M6 ZL1 1LE with wider stickier tires, aero, and 36% steeper gear ratio in 6th than a regular ZL1.

At 85mph, you're turning 2,720 with a MH3 M6 in 6th vs. 2,000.
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Old 01-23-2020, 07:30 AM   #17
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Originally Posted by RUQWIKR View Post
You have the ratios backwards. The A1Z / ZL1 1LE gets the MH3 which has the 0.68 6th. Funny how the EPA rules for fuel economy as both the regular M6 ZL1 and a M6 ZL1 1LE show the same fuel economy rating. Which is no where true for a M6 ZL1 1LE with wider stickier tires, aero, and 36% steeper gear ratio in 6th than a regular ZL1.

At 85mph, you're turning 2,720 with a MH3 M6 in 6th vs. 2,000.
Ok, now I understand. I was confused as hell looking at MLee's post and reading everyone else's comments. I agree, the ZLE ratio's are much better tailored for the drag strip or high speed road courses.
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Old 01-23-2020, 12:12 PM   #18
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Originally Posted by L78toLT1 View Post
Ok, now I understand. I was confused as hell looking at MLee's post and reading everyone else's comments. I agree, the ZLE ratio's are much better tailored for the drag strip or high speed road courses.
I like the 1-5 ratios on MJK / MH3 but would prefer the 0.50 6th-gear of the MM6 or 0.54 of the MJK. The 0.82 5th still tops out around 170mph on a ZL1 1LE. Unless you need more than that on a road course, that hybrid combo would be the best of both worlds.

Last edited by RUQWIKR; 01-23-2020 at 01:18 PM.
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Old 01-23-2020, 12:24 PM   #19
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Uhhhhhh... not sure where you got this, but the numbers on the chart below indicate both transmissions are identical with the exception of 6th gear...

MJK and MH3:
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Old 01-23-2020, 04:27 PM   #20
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The ZL1 1LE was not produced in 2017. It started in 2018. The chart you posted says 2017 Passenger car transaxle/transmission - Manual. I am guessing they changed ratios in 2018.
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Old 02-10-2020, 10:33 AM   #21
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The ZL1 1LE was not produced in 2017. It started in 2018. The chart you posted says 2017 Passenger car transaxle/transmission - Manual. I am guessing they changed ratios in 2018.
Maybe....however, it has been my experience that cars normally start production within the year prior.

For example, the C8 is designated as a 2020 car, but the true production year technically started in 2019. The first completed C8 rolled off the assembly line Feb 2020.

But it is possible changes were made.
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Old 02-10-2020, 12:24 PM   #22
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Quote:
Originally Posted by RUQWIKR View Post
You have the ratios backwards. The A1Z / ZL1 1LE gets the MH3 which has the 0.68 6th. Funny how the EPA rules for fuel economy as both the regular M6 ZL1 and a M6 ZL1 1LE show the same fuel economy rating. Which is no where true for a M6 ZL1 1LE with wider stickier tires, aero, and 36% steeper gear ratio in 6th than a regular ZL1.

At 85mph, you're turning 2,720 with a MH3 M6 in 6th vs. 2,000.
Whoops... I simply miss labeled the columns and just now checking back in. Thanks for the catch.

Quote:
Originally Posted by L78toLT1 View Post
Ok, now I understand. I was confused as hell looking at MLee's post and reading everyone else's comments. I agree, the ZLE ratio's are much better tailored for the drag strip or high speed road courses.


It's fixed now...

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Old 02-10-2020, 01:09 PM   #23
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Originally Posted by Tim M View Post
The ZLE trans (6th gear) is why it has a higher topspeed than a regular ZL1 (190+ vs 175 mph).

Interesting my stock SS 1LE matches topspeed on a regular ZL1 - completely gearing related.
You'll never reach those speeds in a 1/4 mile race or race course track in a ZL1 or SS 1LE.

Hell...even in a freeway pull, the 5th gear in the M6 SS 1LE is too tall to hang after 90+ mph (I used to own a 2016 SS).

One of my future projects is to change my M6 ZL1 trans with a ZL1 1 LE M6 trans...don't need it but just love having it!!
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Old 02-10-2020, 01:35 PM   #24
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Originally Posted by Krowser View Post
You'll never reach those speeds in a 1/4 mile race or race course track in a ZL1 or SS 1LE.

Hell...even in a freeway pull, the 5th gear in the M6 SS 1LE is too tall to hang after 90+ mph (I used to own a 2016 SS).

One of my future projects is to change my M6 ZL1 trans with a ZL1 1 LE M6 trans...don't need it but just love having it!!
Why don’t you see if there is a shop that could open up the transmission and order the necessary parts for the gear ratio difference. May be less expensive than replacing the entire unit. Unless maybe you find a good used unit.
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Old 02-10-2020, 02:25 PM   #25
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Originally Posted by Scottyz View Post
Why don’t you see if there is a shop that could open up the transmission and order the necessary parts for the gear ratio difference. May be less expensive than replacing the entire unit. Unless maybe you find a good used unit.
I would, but I must research if the gear ratios are exactly the same.

My previous research for a 2017 camaro showed the gears were identical except for the 6th gear: 0.536 for the ZL1 vs 0.675 for the ZL1 1LE.

However, what the previous posts are showing is all 6 gears have different ratios, so I gotta look into it a little more...
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Old 02-10-2020, 03:27 PM   #26
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Quote:
Originally Posted by Krowser View Post
I would, but I must research if the gear ratios are exactly the same.

My previous research for a 2017 camaro showed the gears were identical except for the 6th gear: 0.536 for the ZL1 vs 0.675 for the ZL1 1LE.

However, what the previous posts are showing is all 6 gears have different ratios, so I gotta look into it a little more...
I'm sure it could be done, but would probably be prohibitively expensive. Given that every gear ratio is different, you would have to replace every cog on the main and cluster gear shafts, along with syncros, and probably forks. I agree the ZLE ratios are much better for the way most of us use these cars. I'd love to have one, anyone want to swap lol!
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Old 02-10-2020, 06:14 PM   #27
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Quote:
Originally Posted by Krowser View Post
I would, but I must research if the gear ratios are exactly the same.

My previous research for a 2017 camaro showed the gears were identical except for the 6th gear: 0.536 for the ZL1 vs 0.675 for the ZL1 1LE.

However, what the previous posts are showing is all 6 gears have different ratios, so I gotta look into it a little more...
There is no such thing as a 2017 ZL1 1LE... gears changed in 2018
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Old 02-11-2020, 07:44 AM   #28
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Originally Posted by mlee View Post
There is no such thing as a 2017 ZL1 1LE... gears changed in 2018
You are correct, the 2018 ZL1 1LE did not debut in 2017....however, as I previously stated, cars can be manufactured 1 year in advance of their actual designated build year.

Look at the 2017 Tremec manufactured GM TR 6060 transmission designated as "TR6060 MH3" which happens to be the same designation for the 2018 Camaro ZL1 1LE.

Now, is it possible GM changed the gear ratios? Sure is! So, that's why I wrote I have to do more research...
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Last edited by Krowser; 02-11-2020 at 09:09 AM. Reason: spelling
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