Question about 1990 Buick Skylark
My car was running hot after finding that problem--radiator cap and heat sensor ---the transmission started immediately as soon as we put on new parts shifting hard -we unplugged the speedometer now it shifts fine what is wrong????
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
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Posted on Jan 02, 2017
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For car running hot and overheating issues, I suggest to you go
through this help links. Click this link below and go through the
troubleshooting procedure to take care of the problems: ----
temp gauge goes erratic?
Temperature gauge keeps fluctuating up and
down close to red?
Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?
Car overheats and Air blows hot at idle?
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
Temperature gauge does not move and no heat
when heater is ON?
This details will help.Thanks.
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