Yep, you'd notice the scrubbing on the pavement. Have you tried
jacking up the rear end and climbing under there and watching the
actuator while someone engages it and you slowly turn the back wheels?
My diff lock was stuck too because of a slightly bent actuator cage.
The bent cage would allow movement of the pin but not enough to go all
the way into the tranny. I pulled out the knob and got under there
with a big-arse screwdriver and tweaked the cage a little while
spinning the tire and it popped in. I lubed the heck out of the whole
assembly and just kept trying to find that sweet spot and finally did.

Jeff
On Oct 12, 2009, at 1:41 PM, Bruce Todd wrote:

>
>
> On Mon, Oct 12, 2009 at 11:34 AM, Jeffrey Vickers <jeff@vickersdesign.com
> > wrote:
> Are you sure its not engaging when driven? Sometimes it takes a while
> to engage. You've got to get the front and rear to turn at a different
> rate - like going into a corner.
>
> I've slowly turned corners and have zig zagged up and down my street
> - to no avail.  If engaged I think I would notice the different
> handling especially attempting to turn the steering wheel...the back
> wheels would skip across the pavement.  My mechanic suggested I keep
> trying as well.