8 Speed Auto vs 6 Speed Auto
01-14-2014, 11:47 AM
#1
Racer
Thread Starter
8 Speed Auto vs 6 Speed Auto
There has been a lot of discussion about the 8 speed transmission vs the 6 speed. Much is said about the technical aspects (shift time, weight savings, etc), but so far I can't find anywhere that says what the MPG difference is. I assume it is better, but by how much?
Would GM introduce a new automatic shift transmission just for those technical reasons, or does the higher MPG and CAFE have anything to do with it? Any ideas?
Would GM introduce a new automatic shift transmission just for those technical reasons, or does the higher MPG and CAFE have anything to do with it? Any ideas?
01-14-2014, 01:33 PM
#2
Le Mans Master
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Much like the new 7 speed, I'm sure the 8A will have more overdrive ratios to take advantage of the torque to improve the fuel mileage.
01-14-2014, 02:19 PM
#3
Racer
Thread Starter
01-14-2014, 02:31 PM
#4
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5% improvement in efficiency is what I recall from one of the press releases.