Quote:
Originally Posted by VADER SS L99
I keep reading that people are disappointed that the 6th gen is not getting the TR-6070 7 speed in favor of the TR-6060 6 speed. Why is this? Did you think it had better gearing for performance? Did you just want 3 overdrive gears? Did you think it was a stronger trans? Does it shift better? Did you want it for better mpg?
I bet most of you thought that the 7 speed had more forward gears and better ratios for performance. I'm here to tell you that the 7 speed has 4 forward gears just like the 6 speed. The 7 speed just has a extra overdrive.
Look at the 7 speed ratios
1st-2.97
2nd-2.07
3rd-1.43
4th-1.00
5th-.71
6th-.57
7th-.48
Now look at the 6 speed ratios
1st-3.01
2nd-2.07
3rd-1.43
4th-1.00
5th-.84
6th-.57
As you can see the gearing is almost identical other than the fact that the 6th speed has a little stronger 1st gear and no 7th gear. Torque capacity of the 7speed is only 20ftlbs better. Considering the TR-6060 has gone in such cars as the ZL1 and GT-500 I think it will be plenty strong for a 6th gen SS. As far as shifting, well I wouldn't know. I guess you would have to drive a C7 and then a ATS-V back to back. The only real thing I see it helping is mpg and that's a maybe.
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You have to also factor in the final drive ratio. The 6th Gen will have 3.73:1 vs the 5th Gen 3.45:1. That will give the new setup lower overall gearing 1-6 and allow one to keep it in the power band more easily. I was very surprised the aren't offering the 6070 the first year, but I think they will in 2017.