M6 or M12 trans
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
http://forums.corvetteforum.com/c5-t...ed-advise.html
http://forums.corvetteforum.com/c5-t...questions.html
Search "MM6 M12" or more results.
http://forums.corvetteforum.com/c5-t...questions.html
Search "MM6 M12" or more results.
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
Here are the difference between the 2 transmissions.
MM6
The input shaft gear (also 4th gear) has 31 tooth and turns 36 tooth countershaft gear for .86 reduction.
Chevrolet Corvette C5 NON Z06
2.66:1 1.78:1 1.30:1 1.00:1 0.74:1 0.50:1
M12
The input shaft gear has 29 tooth and turns 38 tooth countershaft gear for .76 reduction.
Chevrolet Corvette C5 Z06
2.97:1 2.07:1 1.43:1 1.00:1 0.84:1 0.57:1
Both transmissions have the same 5-6 cluster gear and drive gears and the difference in overdrive is due to the different reduction from the input/cluster gear ratios.
IMHO, the best set up for drag racing is using MM6 with 3.90 gears. This is same as the M12 with 3.42 except for 4th (4th is 1 to 1 but drives 3.42 or 3.90).
MM6
The input shaft gear (also 4th gear) has 31 tooth and turns 36 tooth countershaft gear for .86 reduction.
Chevrolet Corvette C5 NON Z06
2.66:1 1.78:1 1.30:1 1.00:1 0.74:1 0.50:1
M12
The input shaft gear has 29 tooth and turns 38 tooth countershaft gear for .76 reduction.
Chevrolet Corvette C5 Z06
2.97:1 2.07:1 1.43:1 1.00:1 0.84:1 0.57:1
Both transmissions have the same 5-6 cluster gear and drive gears and the difference in overdrive is due to the different reduction from the input/cluster gear ratios.
IMHO, the best set up for drag racing is using MM6 with 3.90 gears. This is same as the M12 with 3.42 except for 4th (4th is 1 to 1 but drives 3.42 or 3.90).
