Hi all. I am new to RC cars and recently bought WL A979. Yesterday I noticed that the left side of the car is not steering properly. Also the steering of the right side is not so smooth. I cleaned the car thoroughly. Used WD-40 sparay too. I am not sure if this is the servo problem or some other part is not functioning properly.
Please help. I will also try to make a video and post it soon. 

Try trimming the steering servo through your transmitter and try to change the position.

Thanks . Have tried that . Many a times. I ll post a video today. Just need to know if the servo is a problem or something else.

Thanks for your kind response. The car is working now. I thoroughly clean each and every part of the car. Greased it again. Disassembled it completely and then reassembled. Even changed the bearings of the front with the rear ones. Dunno if bearings had to do something with steering but its working fine now. Earlier the steering was completely jammed! Thanks again!