I have a 3.73 in mine (was 2.73). My original AODE went belly up last year so now I have a 4R70W with a Transgo HD2 shift kit. The higher ratio 0.70:1 overdrive (0.67:1 in the AODE) means I'm turning more rpm on the highway but it's acceptable. The 2.84:1 1st gear (2.40 in the AODE) does allow me to scoot off the line faster though.