ZF Option
Team Owner
Joined: Aug 1999
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St. Jude Donor '10
CFI was 100% right and "the rest of you" weren't, and no matter how much you hate that fact, or the technicalities of it, he was right.
I have the luxury of saying this because while I thought I knew the answer, I wasn't sure, and didn't try to shove it down anyone's throat.
I have the luxury of saying this because while I thought I knew the answer, I wasn't sure, and didn't try to shove it down anyone's throat.
Originally Posted by CentralCoaster
For the ZF6 it just happens those rpos are redundant since there was only one transmission choice, ML9 to put in the MN6 cars. The fact that MN6 was carried over to the C5 makes this clear.
Last edited by SurfnSun; Apr 3, 2007 at 09:12 AM.
Team Owner
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
I really don't care on the subject. My 6-speed corvette doesn't have any of those option codes.
No hard feelings.
But, next time someone asks what the option code for the ZF is, we all know the answer very clearly thanks to CFI's stubbornness.
Team Owner
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Posts: 24,017
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St. Jude Donor '10
Race Director
Joined: Dec 2002
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Let's see if we understand this correctly:
ML9 is the option for the ZF6 gearbox.
MN6 is the option to build the car to accept the ZF6 gearbox, i.e. clutch pedal, MC, slave, lines, console particulars, CAGS harness, etc.
Who'd like a glass of warm milk?
(..and thanks, CFI-EFI.)
Larry
code5coupe
__________
I ain't easily impressed....
ML9 is the option for the ZF6 gearbox.
MN6 is the option to build the car to accept the ZF6 gearbox, i.e. clutch pedal, MC, slave, lines, console particulars, CAGS harness, etc.
Who'd like a glass of warm milk?
(..and thanks, CFI-EFI.)
Larry
code5coupe
__________
I ain't easily impressed....
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by Mr Mojo
Originally Posted by CFI-EFI
If that is what it says, then it is self contradicting. I believe, correct me if I'm wrong, that 1997 and up Corvettes don't use the ZF trans. Therefore, based on the definition above, the MN6 can't be the 1997-2004 six speed trans.
Originally Posted by Mr Mojo
Well going by the Black Book, which many here go by, it lists MN6 as the RPO for the ZF six speed from 1989-2004.
RACE ON!!!
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Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
For the record, I believe that ML9 is the option code for the ZF6. I think that MN6 is the option code that indicates the rest of the BS for the 6 speed. The pedals, hydraulics, etc... I don't know that though.
I can't remember if I posted my source in my original post that began with, "I found it" but I do remember saying a few posts later that my source was suspect because it wasn't GM.
I would still like to see something from GM that explains the MN6 option code.
Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
It's not dead, or even terminally ill at this point. People are/were saying that RPO code MN6, unequivocally meant ZF6. Then that was disproved. Then it went to MN6 meaning 6 speed. That also looks to be technically incorrect in that MN6 looks to indicate the provisions for a 6 speed transmission, not the transmission itself. However, no one has been able to come up with a confirmed source for what MN6 means.
If you can show us definitive proof of what MN6 means, then, and only then, may you shoot the horse. If, after you've shot the horse, people continue to debate, then you may beat the dead horse. Until then, the horse is very much alive.
If you can show us definitive proof of what MN6 means, then, and only then, may you shoot the horse. If, after you've shot the horse, people continue to debate, then you may beat the dead horse. Until then, the horse is very much alive.
Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
I'm not sure if its happened yet, but anyone here who criticizes anyone else for being too **** retentive or argumentative is a hypocrite, because if you yourself weren't **** retentive and argumentative you wouldn't be involved in this thread in the first place.
Race Director
Joined: Sep 2000
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From: The Top of Utah
I resemble that!
Originally Posted by neat
If you can show us definitive proof of what MN6 means, then, and only then, may you shoot the horse.
RACE ON!!!
Team Owner
Joined: Aug 2000
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From: San Pedro CA
I have heard back from Mike and this is the exchange:
Sent:
His Reply
Next:
Final Reply:
I honestly hope this puts an end to the discussion... gotta love the difference between Merchandising and Build codes!
Sent:
Mike,
How are things? Hope all is well.
I have a question... 1989-1996 Corvette. ZF 6spd option codes. It has caused quite a stir over at the Corvette Forum and I hope you can set the record straight!
The code you reference is the MN6 code. However, there is also an ML9 code.
This is what we have figured out:
ML9 reflects the ZF6 transmission.
MN6 reflects the fact that a manual transmission is being installed. It triggers the pedals, hydraulics, etc.
Are we correct?
Thanks!
Andy
How are things? Hope all is well.
I have a question... 1989-1996 Corvette. ZF 6spd option codes. It has caused quite a stir over at the Corvette Forum and I hope you can set the record straight!
The code you reference is the MN6 code. However, there is also an ML9 code.
This is what we have figured out:
ML9 reflects the ZF6 transmission.
MN6 reflects the fact that a manual transmission is being installed. It triggers the pedals, hydraulics, etc.
Are we correct?
Thanks!
Andy
From: Mike Antonick
To: Andy Bogus
Subject: Re: RPO Clarification
Hi Andy:
You're partially correct. The ML9 code is indeed the correct designation for the C4 Corvette ZF 6-speed manual. It is the code the Corvette factory uses and it is the code that would appear on the label affixed to the vehicle. As you've pointed out with your 1992, both codes may appear on the label. Not sure if that's always the case.
MN6 is GM's merchandising code for a 6-speed manual. It's what a dealer uses to order the vehicle. In the days when RPOs appeared on the window sticker, the merchandising code is what you'd see. Another way of saying it that when Camaro used a Borg-Warner 6-speed and Corvette used the ZF, the ordering code was MN6 for both so far as the dealer was concerned, even though the transmissions were different and had different codes at their factories.
Fortunately, most merchandising codes match what I'll call "build" codes. Most glaring exceptions include transmissions and axles. You'll note that the 2007 Corvette Black Book still lists an MX0 code for the automatic, even though 2006-7's paddle-shift six-speed is a different unit with a different build code than that of 2005's 4-speed auto.
These inconsistencies presented themselves nearly thirty years ago when I assembled the first Corvette Black Book. Back then it seemed logical to use what the dealer and customer saw, and what was on most of the car's paperwork, especially the window sticker. Over the years, I've tried to be consistent. Unfortunately, Chevrolet no longer includes RPOs on the window sticker, adding to the confusion.
I'm going to take a fresh look at how this is presented in the 2008 edition. At the very least, I should include some language that sorts this out better.
Thanks to you and your cohorts for bringing this to my attention.
Mike
To: Andy Bogus
Subject: Re: RPO Clarification
Hi Andy:
You're partially correct. The ML9 code is indeed the correct designation for the C4 Corvette ZF 6-speed manual. It is the code the Corvette factory uses and it is the code that would appear on the label affixed to the vehicle. As you've pointed out with your 1992, both codes may appear on the label. Not sure if that's always the case.
MN6 is GM's merchandising code for a 6-speed manual. It's what a dealer uses to order the vehicle. In the days when RPOs appeared on the window sticker, the merchandising code is what you'd see. Another way of saying it that when Camaro used a Borg-Warner 6-speed and Corvette used the ZF, the ordering code was MN6 for both so far as the dealer was concerned, even though the transmissions were different and had different codes at their factories.
Fortunately, most merchandising codes match what I'll call "build" codes. Most glaring exceptions include transmissions and axles. You'll note that the 2007 Corvette Black Book still lists an MX0 code for the automatic, even though 2006-7's paddle-shift six-speed is a different unit with a different build code than that of 2005's 4-speed auto.
These inconsistencies presented themselves nearly thirty years ago when I assembled the first Corvette Black Book. Back then it seemed logical to use what the dealer and customer saw, and what was on most of the car's paperwork, especially the window sticker. Over the years, I've tried to be consistent. Unfortunately, Chevrolet no longer includes RPOs on the window sticker, adding to the confusion.
I'm going to take a fresh look at how this is presented in the 2008 edition. At the very least, I should include some language that sorts this out better.
Thanks to you and your cohorts for bringing this to my attention.
Mike
Hey Mike,
Thanks!
Another question... My 1992 is a 6spd car and guess what, it has both ML9 and MN6 on the RPO label!
Andy
Thanks!
Another question... My 1992 is a 6spd car and guess what, it has both ML9 and MN6 on the RPO label!
Andy
Andy:
Never too late to learn something new. Logic told me the plant would only include the build code, but you've proved that wrong. What I don't know is if the merchandising code is always on the label. I've have to start looking at these cars at the next show I attend. I bought two C4s new, and I always drive manuals, but at the moment I'm C4-less.
Mike
Never too late to learn something new. Logic told me the plant would only include the build code, but you've proved that wrong. What I don't know is if the merchandising code is always on the label. I've have to start looking at these cars at the next show I attend. I bought two C4s new, and I always drive manuals, but at the moment I'm C4-less.
Mike
