Jakar iskar mota muhimmiyar na'urar kariya ce a cikin kariyar aminci ta mota, kuma jakar iskar mota mai haɗin gwiwa ta zama mizanin motar. Lokacin da jakar iskar mota mai haɗin gwiwa ke aiki, ana hura jakar iskar ta cikin na'urar hura iskar gas, kuma ana tura jakar iskar bayan hauhawar farashi don cimma manufar kare mai shiga. Sabon matsayin direban motar mai haɗin gwiwa na yau zai tsara babban allo wanda ke gudana ta cikin dukkan matsayin direban kuma ya fi saman allon kayan aiki girma, wanda ke shafar faɗaɗa jakar iskar.
Siffa da hanyar naɗewa ta jakar iska suna da tasiri sosai kan tasirin faɗaɗawa, kuma jakar iska ya kamata ta kasance kusa da allon kayan aiki da allon nuni don samun ingantaccen tasirin kariya. A lokaci guda, hanyar naɗewa ta jakar iska ma tana da mahimmanci musamman. A halin yanzu, jakar iska mai haɗin gwiwa tana da hanyoyi biyu na naɗewa: ɗaya ita ce naɗewa ta injiniya, wato matse jakar iska a cikin harsashi ta hanyar sarrafa hannun injin; ɗayan kuma ita ce naɗewa ta hannu, wadda ake naɗewa da hannu tare da mai rabawa.
Naɗin naɗewa na injina yana da ɗan gyara, yana da wuya a sami manyan canje-canje, kuma jakar iska tana haɓaka da sauri kuma ƙarfin tasirin yana da girma, wanda ba zai iya cika duk buƙatun gwaji ba. Naɗewa da hannu na kayan aiki na iya daidaita saurin faɗaɗa jakar iska kuma tasirin yana da ƙarami, babban fasalin shine cewa yanayin jakar iska za a iya daidaita shi don biyan buƙatun karo na samfura daban-daban.
