On an 03 cummins 6 spd, which gear provides a 1:1 ratio?

Basically, I need to make power runs and I am not sure of the proper gear to use.

On a Ford, the 6 speed is labeled: L,1,2,3,4,5 where the gear numbered "4" (which is actually 5th) is the 1:1 ratio.

Should I use 4th or 5th on a dodge to get 1:1?

thanks for any help.

 

Run a couple in both. 5th and 6th. 5th is 1/1.

 

It will be run in all gears at numerous load settings, I just didn't know which was 1:1 for straight up inertia pulls

thanks again.

 

Vic,

be sure to post your results for all to see