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FUNCTION OF CLUTCH AND BRAKE Control members Abbr. Function q 6 Reverse clutch R/C To transmit input power to front sun gear q 9 . q 7 High clutch H/C To transmit input power to front planetary carrier q 11 . q 16 Forward clutch F/C To connect front planetary carrier q 11 with forward one-way clutch q 17 . q 18 Overrun clutch O/C To connect front planetary carrier q 11 with rear internal gear q 14 . q 5 Brake band B/B To lock front sun gear q 9 . q 17 Forward one-way clutch F/O.C When forward clutch is engaged, to stop rear internal gear q 14 from rotating in oppo- site direction. q 19 Low one-way clutch L/O.C At D 1 position, to prevent rear internal gear q 14 from rotating in opposite direction. q 20 Low & reverse brake L & R/B To lock rear internal gear q 14 (2, 1 2 and 1 1 ), to lock front planetary carrier q 11 (R posi- tion). CLUTCH AND BAND CHART Shift position Reverse clutch q 6 High clutch q 7 Forward clutch q 16 Overrun clutch q 18 Band servo Forward one- way clutch q 17 Low one- way clutch q 19 Low & reverse brake q 20 Lock-up Remarks 2nd apply 3rd release 4th apply P PARK POSITION R q q REVERSE N NEUTRAL POSITION D*4 1st q *1 q X q I I Automatic shift 1 ) 2 ) 3 ) 4 2nd q *1 q q q I 3rd q q *1 q q *2 q X q X I *5 q 4th q q X *3 q X q X q q 2 1st q q X q I I Automatic shift 1 ) 2 + 3 2nd q q q q I 1 1st q q I q Locks (held sta- tionary) in 1st speed 1 + 2 + 3 2nd q q q I *1: Operates when overdrive control switch is being set in “OFF” position. pressure area on the “release” side is greater than that on the “apply” side. *3: Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts. q : Operates. q q : Operates when throttle opening is less than 3/16, activating engine brake. v : Operates during “progressive” acceleration. J : Operates but does not affect power transmission. q X q : Operates when throttle opening is less than 3/16, but does not affect engine brake. GI MA EM LC EC FE PD FA RA BR ST RS BT HA EL IDX OVERALL SYSTEM Shift Mechanism (Cont’d) AT-21 |