89 lebaron speedo and tach

the tachometer and speedometer in my 89 lebaron doesn't seem to be working right. when in park, if i reved the engine the speedometer
kinda seems to emulate the tachometer, jumps up and down the more i rev the engine.
but the tachometer doesn't worked at all, unless you take a sharp right corner, then it may work for a split second.
the ecu is giving out a code 37 too: an open or shorted condition in the torque convertor clutch solenoid circuit (automatic transaxle)
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