generally speaking on all modern 6 speed trucks what gear is the last 1 to 1 ratio?? just 6th? or?

 

direct drive (1:1) is 5th, with 6th being your overdrive (0.76, 0.78, even 0.80:1)

 

was wondering if they had 2 o/d gears.

 

that would be nice.

 

With the amount of the bottom end torque in the CTD, a second O/D wouldn't even slow it down an ounce.
Even in R/C planes, they have diesels.
They've diesel kits to convert from 2-stroke nitro.
R/C = Remote Control
Check out www.rccanada.ca

 

2 Overdrive gears, diesel corvette?