A gearbox combination refers to different speeds or gear ratios that are available in a gearbox. It means that the gearbox has multiple options for controlling and adjusting the speed or power of a mechanical device. Full definition
Speaking of models, while the Lancer only comes with a 2.0 litre engine mated to a CVT here in Malaysia with two trim levels — EX and GT, for Proton there are 3 variants, all with different engine and gearbox combinations as well as equipment levels. (paultan.org)
At slower speeds, the engine and DSG gearbox combination work smoothly and when pressing on changes are quick and accurate when using the paddles. (carbuyer.co.uk)
It's generally not befitting of an executive car — especially if you've plumped for that engine / gearbox combination in a more expensive R - Sport or Portfolio specification. (autoexpress.co.uk)