Question about Chevrolet Monte Carlo
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Posted on Jan 02, 2017
SOURCE: transmission shifts hard
Your car has the 125c/3T40 model trans,3 speed automatic with lockup.When you say you unplugged the "speedometer",if you are referring to a square electrical connector on the trans,facing the radiator,that connector is not the speedometer,but the lockup circuit inside the transmission.It is likely the lockup solenoid inside the side pan has gone bad and is malfunctioning.It is a common problem on those transmissions.You will lose some gas mileage by unhooking the connector,and eventually,years down the road,will hurt the trans from the fluid running too hot.Lockup clutch application in a General Motors lockup torque convertor helps to cool the fluid.
Posted on Sep 02, 2008
sounds like trans has gone bad, last service of filter and fluid? clogged screen or low/burnt fluid would effest but if clunking sounds like trans is shot
Posted on Jul 06, 2009
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