Speedometer Adjustment for 5KTQ?

[Swann, Benjamin R. (BSWANN)]

Is there anyway to adjust the speed reading of the speedometer.  Mine seems
to be reading a little fast after I replaced a gear(from spare unit) that
had caused the Odometer to stop working.  

I did not see anything in the Bently.

I will be doing some long cruises and comparing with mile markers and watch,
and would like to know if there is a way to adjust the speedometer so it is
dead on.  I have the feeling it isn't even close right now.

Or maybe I really have been cruising at 85-95 even though it feels like much
less.

Ben
'87 5000cstqw - probably not going as fast as as speedo says.
'85 4000csq - Sounds and feels like it is going faster than the speedo says.