Iyo 621F uye 721F inoratidzira mana anogoneka emagetsi modhi inobvumira vashandisi kuenzanisa iyo yemuchina inobuda kune iripo injini simba.Iwo anotakura anosanganisira anorema-basa maekisi ane auto-kukiya pamberi uye akavhurika kumashure akasiyana kuti anyatso dhonza mumamiriro akasiyana.Iyo axle yakagadzirirwa kubatsira kuderedza kupera kwematayi, kunyanya panzvimbo dzakaoma, maererano neOEM.Iyo 621F uye 721F inopa inosarudzika Efficiency Package iyo inosanganisira shanu-kumhanya kufambisa nekiyi-up torque converter yekukurumidza kufamba mumugwagwa, kukurumidza uye nguva pfupi yekutenderera, pamwe nemaekisi ane auto locking musiyano uye advanced system programming.Iyo inosarudzika shanu-kumhanya yekufambisa inosanganisira iyo Case Powerinch ficha inoita kuti vashandisi vasvike pazvinangwa nekukurumidza uye chaizvo zvisinei nekumhanya kweinjini.Nyaya inoti chimiro ichi chinovimbisa kuti hapana kudzoserwa kunyangwe pamateru, zvichiita kuti zvive nyore uye nekukurumidza kukanda murori.