Stepped Transmissions
Stepped transmissions yog hom siv dav tshaj plaws. Lawv ntiav cov tsheb ciav hlau los muab cov lej tshwj xeeb ntawm cov iav ruaj khov. Raws li hom iav tsheb ciav hlau siv, lawv tau muab faib ua ob pawg: tsau -axis kis tau tus mob (paub kis tau tus mob) thiab rotating-axis transmissions (planetary gear kis). Kev sib kis hauv cov tsheb thauj neeg caij tsheb thiab lub teeb- rau- nruab nrab- cov tsheb thauj khoom feem ntau muaj 3 mus rau 5 lub zog rau pem hauv ntej thiab ib qho rov qab iav; Txawm li cas los xij, kev sib txuas sib txuas siv hauv hnyav- cov tsheb thauj khoom muaj ntau dua ntawm cov iav piv. Cov "tus naj npawb ntawm lub zog" hauv kev sib kis feem ntau yog hais txog tus naj npawb ntawm nws lub zog rau pem hauv ntej.

Kev sib hloov tsis tu ncua (CVT)
Tsis tu ncua Variable Transmission yog hais txog ib qho kev sib kis uas muaj peev xwm muab tau ib qho kev sib piv ntawm cov iav hauv ib qho tshwj xeeb hauv ib qho txuas mus ntxiv, tsis muaj kauj ruam. Los ntawm kev ua kom muaj kev hloov pauv tas mus li, qhov system no ua rau muaj kev sib tw zoo ntawm lub zog hluav taws xob thiab lub cav ua haujlwm. Cov hom kev sib txuas tsis tu ncua muaj xws li hydro-mechanical CVTs thiab hlau- siv CVTs (VDT-CVT).

Integrated Transmissions
Kev sib xyaw ua ke sib kis yog ib hom hydro- kis tau tus mob tshuab uas muaj lub zog hloov pauv ua ke nrog kev sib kis ntawm cov kauj ruam. Hauv cov kab ke no, cov iav piv tuaj yeem sib txawv tsis tu ncua (steplessly) nyob rau hauv ntau qhov sib txawv nyob ntawm qhov siab tshaj plaws thiab yam tsawg kawg nkaus txwv; hom kev sib kis no yog tam sim no pom dav daim ntawv thov.