Do the search..there are two..one in the trans and the other is at the differential.
Speedo sig should come from tran conductor plate turbine sensor.
I will check.
INFO:
http://www.peachparts.com/shopforum/search.php?searchid=1955544
I would suspect the trans sensor b/c you have a tranny complaint and a speedo problem. The differential speed sensor would be sispect if you had just ABS problem.