So, considering this truck is in 6th gear at 40mph I thought locking out gears would be practical. But, really, it just eliminates the last 2 gears that you lock out doesn't it? It's not like it transforms the truck into a 4 gear truck ie: longer gears and less shifts does it?

 

117 views and replys. Either a stupid Q or no one knows what I'm talking about or no one knows???

 

just like an OD off button. but you can do it for any gear

 

Id say its probably a combination of all three of your guesses as to why no one has responded