Ngoja nchangie kidogo transmission system (gearbox system) kuna manual (yenye clutch peddle ambapo kila unapofanya shifting between gears unapaswa kukanyaga clutch peddle na isiyo na clutch peddle) na kuna automatic transmission system..
Hapa kwenye automatic transmission system kuna tofauti pia kuna
1 Traditional automatic transmission yaan ATF inayotumia planetary gear system ambazo ndo nyingi (ambazo utakuta kwenye gear lever yake kuna PRND2L au PRND32L au PRND321, gari zinazokuja na gear box hii ndo huja na button ya OD-yaan over drive-kazi ya OD ni kuifanya gari iweze kufika kwenye top gear so OD ikiwa off maana yake una i-limit gari isi engage top gear so hapa gari itakua ili speed iwe kubwa basi engine has to rev at higher RPM kwakua top gear inashindwa ku compensate engine rotation.
2 kuna automatic transmission ya CVT (continuous variable transmission system-kwanza hii transmission wabongo wengi wameziharibu kwa kuziwekea fluid ambazo si zake na kuziua prematurely.. mfano nissan nyingi, some Toyota-kama Rumion,new ist, vitz zinavokuja na engine 2sz,kr, vanguard,rav4 mis Tanzania, crown these are some zinakuja na CVT transmission, sasa cvt transmission ina operate very different na traditional automatic gear box.. gear box hii inatumia belt ambayo upita kwenye conical pulleys mbili za upande wa input na output.. so kwakua inatumia belt kama pikipiki ya scooter, so haina steps za gear shifting, na shifting kwenye gari zenye gear box hii ni seamless... Na gari huwq inawahi kuchanganya sana.. utaijuaje gari ina gearbox hii? Ukiangalia gear lever yake utakuta ina PRND or PRNDB or PRNDS, or PRNDBS.. s ina stand for sport.. ambapo uki engage "S" gari inakua na nguvu na very fast but inakua inafanya engine ina rev at higher RPM... "B" ni low gear, ni sawq na "L" kwenye traditional automatic transmission ambapo kwenye Cvt transmission "B'' hu stand for engine braking... So hapa unakua inafanya gari itumie compression ya injini kupunguza mwendo wa gari lakini pia kupandia mlima mkubwa but Uki engage D the car will take care its self. Angalizo gearbox hii haitaki kuchanganyiwa transmission fluid.. ukiweka fluid tofauti na the one recommend by manufacturer basi you will cause premature failure of your transmission system immediately.
3 kuna automatic transmission inaitwa DSG/DCT (yaan direct shift gearbox/dual clutch transmission) hii operations zake ni tofauti kabisa na gearbox nyingine za automatic...kwakua gearbox hii haina toque converter, hii gear box ni manual gearbox iliyoka automated kwakutumia dual clutches system. So gear box hii iko very fast kwakua haina any power loss kwakua gearbox ina direct contact na engine tofauti na automatic transmission zinazotumia hydraulic na toque converter...gearbox hii unakuja kwenye gari za ulaya nyingi kama Audi, Volkswagen, Porsche, benz...na ina kua na gear lever yenye PRND basi. So hutakuta switch ya OD kwenye hii gari.. na ina fluid yake ya transmission.. inaitwa DSG transmission fluid ambayo huwa ni lita moja tu.. tofaut na automatic transmission system za magar mengine ambayo hutumia hydraulic kuanzia lita 3 mpaka 5.
4. Kuna automatic gear box kwa gari za hybrid..kama Prius,harrier,filder, crown, acqua,(hybrid zote,hizi zinakuja na gearbox inaitwa e-CVT...hii transmission ambayo ipo kwenye hybrid cars ambapo hii transmission inapokea input power from two power sources (MG2 motor, na power from engine..hii transmission ipo designed hivi kwakua gari inatembea kwa kutumia umeme, or engine power or both of them when needed...so gearbox ina function zake tena tofauti na conventional automatic transmission system.
Sasa ukisha kua na gari automatic ni vema sana kujua gari yako ipo na gearbox gani ili uje ni nina waweza fanya na gari yako.. uje namna ya ku itunza, na kujua specific fluid kwa ajili ya gear box yako.