>>> I've got a 2006 model off-highway vehicle, with a 6-speed Allison transmission. <<< Really??! What kind of OHV do you have that uses an Allison?? I'd like to see a rock-crawler that needs such a HD trans. Sorry, I'm of no help on this one, just amazed that a BIG TRUCK trans made it into a toy (if that is what you consider YOUR OHV). Must be nice. Beau