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I think my 2007 Chevy cobalt might be low on transmission fluid. My car sometimes slightly slips out of gear. Also,the temperature stays hot all the time at 207 degrees. I was told I need to add some antifreeze to my water and that will help with the transmission. Is that true? I did not see any signs of fluid leaking or water under the hood or car. Do a lot of these Chevy Cobalts have similar trouble? how much transmission fluid do I need to change it? I am also having trouble with the fuel pump.

Answers from the Automotive Experts

Maryann Croce, Owner at Croce’s Transmission Specialists Hi, Quinton, Some transmissions are sealed (no dipstick) others have a dipstick. I would recommend getting the fluid level checked. I'm not sure what temperature you are referring to. 207 is operating temperature for an engine but on the hot side for a transmission. Low fluid can cause a transmission to run hot and slip. I would get the transmission concern addressed 1st. Many postponed minor repairs can lead to major ones. Good luck.

Helaine Kurot, Owner/Technician at 360 Automotive If there is a transmission dipstick present, check the fluid level with the car running (tranny in park/neutral) after you drove it for a little while. If it is low, take it to a shop to fix the leak. The logic on this vehicle does take into account the cooling temp sensor, although i have not seen it cause a slipping issue. Coolant does not just disappear. If it is low on coolant, then that issue needs to be addressed first. Also, make sure the fans are coming on when they are supposed to. There is a programming update for the transmission control module. This may help with the shifting, if it is computer related. Either way, you may want to take it to a transmission shop to have it evaluated.

Barb Petrey, President - DBK Enterprises Inc at Jiffy Lube First things first check the level of the transmission fluid. With the engine running check the dipstick and the fluid should be in the hash mark level. If the car has more than 50,000 miles and you have never serviced it, you provably should. Normal operating temperature is 210 degrees To add antifreeze you need to have a 50/50 mix of water and antifreeze and again if you have never serviced the radiator you should have that done. Why do you think you need a fuel pimp? If the engine is running and getting fuel you doesn't need a fuel pump. Keep in mind there is no substitute for proper maintenance and the list is in the owners manual for when to change the fluids.

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