In all the Corvette applications, the clutch was hydraulic.
There are two versions - an early one (identified as "Black Tag"), and a later one (ID'ed as "Blue Tag"). The color represents the background color on the label affixed to the transmission housing. The most substantial physical difference between the two are torque capacity, gear cut angle, and manufacturing location.
The Black tag units are rated for 450 ft-lbs of torque, while th Blue tags are rated for 400 ft-lbs. The Black tags have a smaller angle cut into the teeth compared to the Blue tag units - similar to the difference between the Muncie "Rock Crusher" transmissions and the standard Muncies of old. The Blue tags were manufactured in the USA, and the Black tags were manufactured in Germany.
The transition from Black to Blue occurred in 1993 sometime.
I don't know for a fact if the LT1 bellhousing bolt pattern is the same as the L98 or not, so you might need to make sure that you find a bellhousing from an '89 - '91 six speed.
I can't address any performance or reliability issues - mine is fine!
Steven
There are two versions - an early one (identified as "Black Tag"), and a later one (ID'ed as "Blue Tag"). The color represents the background color on the label affixed to the transmission housing. The most substantial physical difference between the two are torque capacity, gear cut angle, and manufacturing location.
The Black tag units are rated for 450 ft-lbs of torque, while th Blue tags are rated for 400 ft-lbs. The Black tags have a smaller angle cut into the teeth compared to the Blue tag units - similar to the difference between the Muncie "Rock Crusher" transmissions and the standard Muncies of old. The Blue tags were manufactured in the USA, and the Black tags were manufactured in Germany.
The transition from Black to Blue occurred in 1993 sometime.
I don't know for a fact if the LT1 bellhousing bolt pattern is the same as the L98 or not, so you might need to make sure that you find a bellhousing from an '89 - '91 six speed.
I can't address any performance or reliability issues - mine is fine!
Steven
