But to answer the question, yes, that ratio is higher than most overdrives of any kind. The Mopar 4 speed unit uses a .73 OD while the trucks used a .71 OD, so that's a little better. Also, for those who use some of the GM auto OD offerings, they get OD ratios down in the high 60s. I remember threads here where people were disappointed in the OD ratio and basically said the gear splitting thing was the only "advantage" they could think of. That said, that's the only "experience" I've had is reading about other peoples experience. From what I've seen some like them and some don't.
