I-Transmission Input Shaft iyingxenye ebaluleke kakhulu yesinciphisi. Ingekashaft enesivinini esikhulu. Ezimweni eziningi, i-shaft yayo yokufaka izothinta ngokuqondile umsebenzi wayo yonke imishini. Ngokuvamile, i-shaft yokufaka idlulisela amandla enjini noma idivayisi yamandla kusinciphisi, ngakho-ke i-shaft yokufaka idinga izakhiwo ezinhle zomzimba nokunemba, ukugwema umsindo, ukudlidliza nokunye ukukhubazeka phakathi nenqubo yokudlulisela.