Per, i have a couple of good posts on troubleshooting
the diff. lock under the tech section on my syncro
page.  Tim smith is your best beyt on info for the
front.
steve
http://www.concentric.net/~Sxs/SyncroPage.shtml

Per Lindgren wrote:
>
> Yep, I've found that it is soon time to fix that stuck front diff lock,
> so it will be ready and working by the time winter sets upon us (luckily
> at least 3 more months). The prob is, I don't know how to do it, and I
> don't have the Bentley manual. I assume that the lock is stuck from lack
> of use, not a vacuum leak. The lamp blinks as it is supposed to. The
> rear lock works perfectly. I have the instructions found at Steve
> Schwenks site, but those are for the rear lock, and without pics. So,
> these are my questions:
> 1) Can anybody tell me how to do the front diff lock?
> 2) Does the Bentley cover the front diff lock?
> 3) The rear lock?
> 4) Is anybody willing to scan all relevant pages from the Bentley and
> send them to me?
>
> That's a lot of questions, but I need info on this, so I wont screw up.
> I have two manuals that cover the most of the bus, but none of them
> includes the Syncro stuff well (the Haynes not at all)
>
> Greetings,
>
> PerL
> 87 Syncro 112i