zf-6 question
Thread Starter
Instructor
Joined: Oct 2006
Posts: 241
Likes: 25
From: Gettysburg PA
zf-6 question
I need to replace my zf. Could one of the experts explain the difference between the blue and black tag on the zf? Also were all zf-6s geared the same and how could I tell the difference if they weren't? I have a 94 LT1. Thanks in advance for your insight.
Darrin
Darrin
Race Director
Joined: Dec 2006
Posts: 10,383
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Blue tag TQ 400 ft/lbs
Black tag TQ 450 ft/lbs
www.zfdoc.com for repairs.
All were geared to:
1st............2.68
2nd...........1.80
3rd............1.29
4th............1.00
5th.............0.75
6th.............0.50 <--that's one tall gear!
Reverse......2.50
Black tag TQ 450 ft/lbs
www.zfdoc.com for repairs.
All were geared to:
1st............2.68
2nd...........1.80
3rd............1.29
4th............1.00
5th.............0.75
6th.............0.50 <--that's one tall gear!
Reverse......2.50
Burning Brakes
Joined: Aug 2006
Posts: 1,063
Likes: 102
From: Seattle WA
Black tags were in the earlier cars, blue in the later. Black's higher rating was because it had straighter-cut gears but were also noisier. The blues were more helical cut to quiet them down, but they lost a little strength.
In a '94, you most likely have a blue tag. I believe they both had the same ratios.
In a '94, you most likely have a blue tag. I believe they both had the same ratios.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Your 94 is a blue tag. It has the newer gear geometry and is quieter. There is one for sale now in parts section for $1400 new.
Thread Starter
Instructor
Joined: Oct 2006
Posts: 241
Likes: 25
From: Gettysburg PA
Thanks for that clarification. Now, can anyone tell me if there is a clutch that will make less noise when matched up with a SMFW? I am switching back to a DMFW, but a friend will be using a SMFW and is concerned about the noise. Thanks again, the info you guys provide is invaluable.
