Speedo & difflock conversion for later trans install

[Ben Swann]

Along with updated engine install I'm in process of installing a transmission
from an '87 turbo quattro wagon into my '83 UrQ.  I'm wondering if anyone
knows how to utilize/interface the 5kt electronic speedo - has this been done
successfully, or is it simple best to retrofit the trans with the speedo gear
from the earlier cable unit?  That seems like it should be straight-forware
although having the speedo from the avant would be nice - I don't even know if
it goes in to the Instrument cluster, much less what is needed to wire the
electronic speedo.

 

Also, need info. On converting to accommodate the vacuum difflocks, as the '83
trans. Diff is activated from cable in rear  - I think.  It would be nice to
eliminate the cable which  snagged when dropping the engine and trans out -
the last thing I overlooked when yanking motor and trans.

 

Any BTDT?  

 

Ben