Hi All, I brought my 88in landy 15 years ago, not knowing back then about bolt lock diffs, I stood there scratching my head ,what the hell was this sticking out from the drivers side rear hub, it turned out to be a McNamara bolt lock diff, over the years it has got me out of trouble,they are brilliant, the only thing I found, to disconnect it some times I have to reverse a bit so you can wind the axel back out of the diff.