Is this a manual with 3 pedals, one of which is the clutch? If so get someone who knows to show you how. It's not as easy as it might sound by reading and takes a good bit of practice.
Use carb cleaner and a wire brush.
Go to a game that allows the gear type that matches the gear that you have. At the bottom of the screen in the game it will have a box with a picture of your gear in it. Click the box or click the number in the box to use that gear item!
A F13 Gear Box , it can use the long or short ratio gear box from the F13
vauhall gear oil gl4 NOT gl5
what is tiptronic gear box? Automatic gearbox,able to use variable gears by choice
I would reccommend that you use 10w40 Semi Synthetic It's a good quality and well priced oil suitable for your car.
Other than a fault inside the gear-box, it's common for the linkage on top of the gear-box to wear, causing poor/difficult selection of 1st, 2nd, and sometimes reverse gear, off the top of my head the repair kit is 93181355, about £60. The repair kit is only of use as long as you can still get reverse. It's also been redesigned to reduce wear.
Depending on the vehicle, many standard transmissions use ATF, not gear oil.
75W90 synthetic
Manual gear box oil: Total Transmission (B.V 75W-80W) part no. 9730. A2 or Citroen gear oil 2L part no. 9736.41 Automatic gear box are sealed unit: Citroen gear oil 2L part no. 9736.22 The oil can only be changed Automatic gearbox repair garages
It is Electronic gear control. A semi automatic gear box which although takes getting use to, can return better mpg and the same performance as a manual box. The gears are changed by either paddles in the wheel or a sequential gear stick. It does not have a clutch pedal.
clutch is used to transfer the power from engine flywheel to gear box