mikel , yes you need to be concerned , that is the lever that applies the forward band , the number is its ratio , the higher the number the faster the band applies . the 2. 5 is not speced in the cummins trans , so a 2,5 would cause the band to apply slower causing it to slip more before full application .
next time you have the pan down look at the lever , the 3. 8 has 2 raised bars on it .
[This message has been edited by Mopar-muscle (edited 03-13-2001). ]