Now that is a nice program.

I did notice that the ratio that is entered for 5th is different than the Z51 model C6 has though. It should be .71:1


Below are the specs for 2005 Tremec T56 6-speed manual, w/ optional Z51 Sport Package

6-speed manual
Gear ratios (:1)
First: 2.97
Second: 2.07
Third: 1.43
Fourth: 1.00
Fifth: 0.71
Sixth: 0.57
Final drive ratio: 3.42