Speedometer Needle

I have a 1992 Acura Legend and lately my speedometer has gone haywire
once in awhile for no apparent reason. The indicator speed just spins
around back and forth and the D for Drive light flashes. Can anybody
who owns Legend have any such problem and what is the cause? Any help
will be greatly appreciated.

Joni Mitchellson

 

The flashing "D" is the transmission malfunction indicator, and it is
probably flashing because the transmission control module does not get a
good speed signal. You can get trouble codes from the TCM to confirm
this, Other posters have said that Autozone will read out those codes
for free. I bet it will say VSS (vehicle speed sensor). Newer Honda's
have the VSS on the tranny, some older ones used a conventional
speedometer cable from the tranny to the instrument cluster and had an
electronic VSS right at the speedometer (don't know if the speedometer
was electronic or mechanical on those). Yours may be old enough to have
the latter system.

Check that the speedometer cable is connected properly at both the
tranny and the instrument cluster side. Check that the speedometer gear
drive at the tranny end is good.