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TM-78 < SYSTEM DESCRIPTION > [4AT: RE4F03C] STRUCTURE AND OPERATION • The drive force from the input shaft is transmitted by forward rotation of the engaged reverse clutch to the front sun gear. Engagement of the low & reverse brake fastens the front carrier in place, causing the front internal gear to turn in reverse and transmitting force by reverse rotation to the output gear. • The status of each planetary gear is as shown below. Front planetary gear Rear planetary gear TRANSAXLE : Component Description INFOID:0000000009267842 JSDIA1999GB Name Front sun gear Front carrier Front internal gear Condition Input Fixed Output Rotating direction Forward Stopped Reverse Speed Same speed as input shaft — Slower than input shaft Name Rear sun gear Rear carrier Rear internal gear Condition — Fixed Fixed Rotating direction Reverse Reverse Stopped Speed Faster than input shaft Slower than input shaft — Name (abbreviation) FUNCTION Torque converter Amplifies the drive force from the engine and transmits it to the transmission input shaft. Oil pump Driven by the engine, this component supplies oil to the torque converter, control valve assembly, 4-point gear Transmits drive force from the transmission mechanism to the output gear, idler gear, reduction Low clutch (L/C) Connects the rear sun gear and input shaft High clutch (H/C) Connects the front carrier and input shaft Reverse clutch (R/C) Connects the front sun gear and input shaft Low & reverse brake (L&R/B) Fastens the rear internal gear and front carrier in place. 2-4 brake (2-4/B) Brake band that fastens the front sun gear in place. |