Honda Prelude 1993 Service Manual page 468

Description
Clutches
The four-speed automatic transmission uses hydraulically actuated clutches to engage or disengage the transmission gears.
When clutch pressure is introduced into the clutch drum, the clutch piston is Epplied. This press€s the friction discs and sts€l
plstes together. locking them so they don't slip. Power is then transmitted the through the engaged clutch psck to its hub-
mounted gear.
Likewise, when clutch pressure is bled lrom the clutch pack, the piston releases the triction discs and stsel plstes, snd th€y are
tree to slide past each other while disengaged. This allows the gear to spin independently of its shaft, trsnsmitting no power.
13t Clutch
The lst clutch eng€ges/disengages lst gear, and is located at the center of the secondary shaft.
The lst clutch is joined back-to-b8ck to the 2nd clutch.
The 1st clutch is supplied clutch pressure by its oilfeed pipe within the secondsry shaft,
1st-hoH Clutch
The 1st-hold clutch engages/disengages 'l st-hold or 1 1 i position, and is located at the end of the countershaft, just behind
the torque converter housing. The I st-hold clutch is-supplied clutch pressure by its oil teed pipe within the countershsft.
2nd Clutch
The 2id clutch engages/disengages 2nd gear, and is located at the center of th6 secondary shaft, The hd clutch is ioined back-
to-back to the 1st clutch. The 2nd clutch is supplied clutch pressure through th€ socondary shsft by a circuit connected to th6
internal hydraulic circuit.
3rd Clutch
The 3rd clutch engages/disengages 3rd geaf, and is located at the center of the msinshsft.
The 3rd clutch is joined back-to-back to the 4th clutch.
The 3rd clutch is supplied clutch pressure through the mainshaft by a circuit connoctod to ths regulator valve body,
4th Clutch
The 4th clutch engages/disengages 4th gear, as well as reverse gear, and is located at the c6nt6r of the msinshaft.The 4th
clutch is joined back-to-back to the 3rd clutch. The 4th clutch is supplied clutch proasura by its oil feed pipe within the
mainshaft.
One-way Clutch
The one-way clutch is positioned between the countershaft lst gear and 3rd 968r, with the 3rd gsar splined to th€ countsrshsft.
The 1st gear provides the outer racs surface, and the 3rd gear provides the inner race surfacs, The on€-way clutch locks up
when power istransmitted from the mainshaft 1st gear to the countershEft 1st gear.
_
The lst clutch and gears remain engaged in the 1st. 2nd, 3rd, and 4th g€sr rangss in the ll1l,
fQg,lor l ll oosition.
However, the one-way clutch disengages when the 2nd, 3rd, or 4th clutches/gsErs are aoolied in th@ , I olorl2l
position.
This is because the increased rotational speed of the gesrs on the countershstt overrides ths locking "spe6d range" of th6 ons-
way clutch, Thereafter, the one-way clutch freewheels with the 1st clutch still6ngaged.
COUNTERSHAFT 1ST GEAA
NOTE:
View lrom right sid€ covor sid€.
LOCKS
€
FREE
14-6