ZF Option
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Le Mans Master
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ZF Option
I'm still learning about Vettes. Is a ZF the same thing as a Tremec t56? Is ZF the option code. Thanks. 
Le Mans Master
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St. Jude Donor '10
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From: The Top of Utah
Originally Posted by BADDUCK
My bad. You'll also find a lot of verbose people on this forum. But you'll get used to it.
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From: The Top of Utah
Originally Posted by SurfnSun
MN6 is generally accepted as the 6 speed option code. ML9 was the trans designation.
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St. Jude Donor '10
Well then youre wrong.
Its been MN6 since 89. Find a console sticker.http://forums.corvetteforum.com/showthread.php?t=956104
Originally Posted by CFI-EFi
You will also find a lot of erroneous information on the forum. You will get used to it.
poetic.
Last edited by SurfnSun; Mar 31, 2007 at 09:20 PM.
Team Owner
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From: San Pedro CA
yea, it's one of those dual RPO code deals... they are both correct.
The T56 is made by Tremec. It doesn't suck, it just isn't a nice as the ZF6. It also does not easily fit into a C4.
There are 2 versions of the ZF6. The early "Black Tag" version, 1989 to mid-1993, and the "Blue Tag" version is from mid-1993 to 1996.
The colour literally means the tag is black or blue.
The differences are:
Black tags are made in West Germany by ZF.
Blue tags are made in Alabama, by GM, under license.
Black tags are rated at 450 ft-lbs.
Blue tags are rated at 400 ft-lbs.
Black tags have less angle on the first (and second?) gears.
Blue tags have more angle on the first (and second?) gears. This was done to help quiet the gear noise (whine).
It is generally accepted that the Black tag is better, but for normal street use, the Blue tag is just fine. Besides, a Blue tag can be rebuilt to better than Black tag standards (it just costs a lot!).
For more specifics, check out www.zfdoc.com.
Also, www.c4guru.com - Changing ZF6 Fluid has some details on how to maintain it.
The T56 is made by Tremec. It doesn't suck, it just isn't a nice as the ZF6. It also does not easily fit into a C4.
There are 2 versions of the ZF6. The early "Black Tag" version, 1989 to mid-1993, and the "Blue Tag" version is from mid-1993 to 1996.
The colour literally means the tag is black or blue.
The differences are:
Black tags are made in West Germany by ZF.
Blue tags are made in Alabama, by GM, under license.
Black tags are rated at 450 ft-lbs.
Blue tags are rated at 400 ft-lbs.
Black tags have less angle on the first (and second?) gears.
Blue tags have more angle on the first (and second?) gears. This was done to help quiet the gear noise (whine).
It is generally accepted that the Black tag is better, but for normal street use, the Blue tag is just fine. Besides, a Blue tag can be rebuilt to better than Black tag standards (it just costs a lot!).
For more specifics, check out www.zfdoc.com.
Also, www.c4guru.com - Changing ZF6 Fluid has some details on how to maintain it.
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Originally Posted by SurfnSun
Well then youre wrong. Its been MN6 since 89. Find a console sticker.
http://forums.corvetteforum.com/showthread.php?t=956104
poetic.
Its been MN6 since 89. Find a console sticker.http://forums.corvetteforum.com/showthread.php?t=956104
poetic.
Also there is this CF page. It shows the six speed RPO listing for all the years it was offered in the C4. Regardless, we agree that it ISN'T ZF6.
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From: San Pedro CA
However, that link you so eloquently dissed, was composed by me with source data from a number of individuals, plus, confirmation from Mike Antonick.
With that said, I grabbed my 2003 copy of the Corvette Black Book, and from 1989 to 1996, the book lists the option as "MN6, 6-speed Manual Transmission."
I have nothing else to say on this topic.
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St. Jude Donor '10
The only thats is pathetic is that you can't admit to being wrong.
Whats poetic is that you shot your mouth off when you didn't know what you were talking about.Like I said....go find a console tag of a 6 speed car. You'll see MN6 on there...regardless if you like it or not. I have a pic from a 90 car, I just need to find an 89.
Last edited by SurfnSun; Mar 31, 2007 at 11:15 PM.
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St. Jude Donor '10
