not quite...

those bolt in overdrives are always engaged, they replace the input gear that slides onto the output shaft of the gearbox if the bolt in overdrive has a catclysmic failure unless youve still got your origingal drive gear (and the OD hasnt taken out what I call the idler gearset) you aint going nowhere.

they usually whine and howl like a banshee before they let go so you do get a wrnaing.

__________________
Dave

"In a Landrover the other vehicle is your crumple zone."

Big Red '03 D110 Extreme (TD5manual chipped)
Fozzy, 2.25D SIII Ex Telecom Highside Ute (bye Kermit)
T4 Diagnostics (sorta)

For spelling call Rogets, for mechanicing call me.