(1) Fault phenomenon: Xiali sedan, wiih a mileage of 172000km. Thedriver said that there is a slight "buzzing, buzzing" sound (coming fromthe bottom) when the sedan is driving straight, but there is a "clickingclicking" abnormal sound when the sedan is turning, and the sound isvery clear'he iack at gesr ol camed tha differentiak to maffunctio!(3) Fnult dlagnasis ana troublechooting Basnd on the symotams of the faut, it is prelminsriy datermincdChecking the luibricating oil levef of the transmission, it is much lower than the oll filling plug, suthat ihare k8 a mihineton n the differontila lack of. oil is one of the reasons for this fault, After adding anough ail, the front axo walifted and auscullated The buzzing sound af the bottom decreased a lot, but thare was sfilubricating oil seeping out from the loint between the differential and the tranDuring the road tost, the abnormal noise of "alicking" stilt occurred when turning it was decidecto dismantle and inspoct the differential, and check the technical condition of the planetary anchalf wheel gears, if not disassembled for, inspection, the fault will worsen and tho gear teethwill hreak, causing even groator losse5