DroppinLs1Vette

I just installed 4:10 gears in my c6 and I was going through my diablo to change the gear ratio to correct the speedo and odometer...BUT I CAN'T FIND THE GEAR/RATIO SECTION ANY WHERE!? I looked under "Modify Parameters" under the predator tune and factory tune...Am I retarded or am I missing something??...I can find the section to adjust the fuel,timing, fans ect, but I cant find the section to adjust the gear ratios...The manual says it's under the modifying parameters" section, but it's not there..I searched through this whole dang thing..

Can some one help me...Or do some diablos not have this option....Or is my diablo bad???????

Your help would be much appreciated

Thanks,
Sonny

DroppinLs1Vette

I may just have answered my own question....

Is it true that with a 6spd z51 you dont have to re-colaborate the speedo when installing 4:10's????.. was just told it corrects it self and the computer reads the speed from the output of the tranny?...

So I dont need to get it tuned or recolaborated???
Is this correct?

shopdog

Manual transmission C6s use a reluctor wheel in the differential to measure speed. Since that counts axle revolutions and not transmission output shaft revolutions, it doesn't need to be recalibrated when you change the final drive ratio.

OTOH, auto tranny C6s measure the transmission output shaft revolutions and do need to be recalibrated when you change the final drive ratio.

DroppinLs1Vette

Thanks man

not08crmanymore

Wow,I learned something in this thread!!Cool!

DroppinLs1Vette

I know right

I just called DTE Engineering, who built my 4:10 rear end...They confirmed this and said you DON'T have to retune the car for changing the rear end gears on a 6sp C6...The speedo and odometer will read correctly....