Transmission on 1991 Acura Legend

D4 light flashs and speedometer falls to zero miles per hour than back up to speed.

by in Tempe, AZ on December 11, 2009
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2 answers 1 comment
ANSWER by , December 11, 2009
The D$ light flashing indicates an automatic transmission fault but yo are lucky in that the Vehicle Speed Sensor (VSS) is a key sensor input for transmission controls. It operates the speedometer and is necessary fro cruise control as well. Common failure relatively easy to change and relatively inexpensive part (compared to a transmission failure).
COMMENT by , July 18, 2010
my car is doing the samething the D4 light is flashing and speedo problems and from reading all the information I think its the VSS, my question is can I do it myself and what else should be done at the same time. Thank you.
ANSWER by , November 04, 2010
my legend unless up to high speed will not switch gears ....also will not go into gear unless in neutral first