1994 MAZDA MX-5 transmission

J TRANSMISSION TRANSMISSION CASE SNAP RING Countershaft front bearing Install the countershaft front bearing by using the SST, and secure it with a new snap ring. d Adjustment shim After measuring dimensions (A) and (B) shown in the fig- ure, use an adjustment shim(s), as specified below, of the thickness corresponding to the value of (A) minus (B), so that bearing end play will be within specification. Bearing end play: 04.lmm (0-0.004 in) Adjustment shim thickness: 0.lOmm (0.004 in), 0.15mm (0.006 in), 0.30mm (0.012 in) Clutch release fork 1. Apply Mori White TA No.2 or equivalent organic rnolyb- denum grease to the shaded areas of the clutch release collar and release fork. 2. Install the clutch release collar and clutch release fork. Gartner Banana

TRANSMISSION J INSTALLATION 1. On level ground, jack up the vehicle and support it evenly on safety stands. 2. Install in the order shown in the figure, referring to lnstallation Note. L 3. Add the specified amount of the specified transmission oil. (Refer to page J-8.) 4. Warm up the engine and transmission, and inspect for oil leakage and transmission problems. 1. Transmission 7. Exhaust pipe Installation Note ............. page J-46 8. Performance rod 2. Power plant frame (PPF) 9. Differential mounting pipe Installation Note ............. page J-46 10. Undercover 3. S~eedometer cable 11. Shift lever w 4. ~iarter Installation Note ............. page J-47 5. Clutch release cylinder 12. Rear console 6. Propeller shaft 13. Shift lever knob Service ...................... section L Gartner Banana

J TRANSMISSION -=DIFFERENTIAL MOUNTING SPACER 45UOJX-054 Installation note Transmission 1. Tilt the engine by pushing up on the front of the oil pan with a wooden block and a transmission jack. d 2. Support the transmission with a transmission jack. 3. Raise the transmission into place and install and tighten the installation bolts. Tightening torque: 64-89 N-m (6.5--9.1 kgf-m, 48-65 ft.lbf) Power plant frame (PPF) 1. Install the differential mounting spacer. Tightening torque: 38-51 N.m (3.8-5.3 kgf-m, 28-38 ft-lbf) 2. Support the transmission with a jack so that it is level. 3. Position the PPF and tighten the transmission-side bolts by hand. 4. Verify that the sleeve is installed into the block. 5. Install the spacer and reamer bolts in the forward hole, then hand tighten them. 6. Snugly install the power plant frame bracket. 7. Tighten the transmission-side bolts. Tightening torque: 104-123 N-m (10.S12.6 kgf.m, 76.7-91.1 ft.lbf) 8. Tighten the differential-side bolts. Tightening torque: 104-1 23 N-m (1 0.S12.6 kgf.m, 76.7-91.1 ft-lbf) Gartner Banana

TRANSMISSION J 9. Install the power plant frame bracket. Tightening torque @ : lO4--123 N.m (1 0.6-1 2.6 kgf.m, 76.7-91.1 ft-lbf) @: 37-43 N.m (3.7-5.5 kgf-m, 27-39 ftlbf) 10. Remove the jack, and connect the wire harness. 11. Measure distance A with a straightedge and vernier cali- pers. Distance A: 66.0 2 5mm (2.60 a 0.197 in) 12. If the distance is not within specification, reposition the PPF to the transmission. FRONT Shift lever 1. Pour the specified amount of oil into the change control case. The change control case must also be filled with the specified amount of oil whenever the extension housing has been removed or the transmission has been overhauled. Specified oil Grade: API service GL-4 or GL-5 All season: SAE 75W-90 Above 10°C (50°F): SAE 80W-90 Specified amount: 80-95 cc (4.9-5.8 cu in) 2. Apply oil to the shift lever as shown. 3. Apply sealant to the contact surfaces of the boot panel and the change control case. Gartner Banana

Before beginning any service procedure. refer to section T of this manual for air bag system service warnings and audio antitheft system alarm conditions . AUTOMATIC TRANSMISSION INDEX ................................ K- 2 OUTLINE ............................. K- 3 SPECIFICATIONS ................... K- 3 ........... CROSS-SECTIONAL VIEW K- 4 POWER FLOW DIAGRAM ............ K- 5 OPERATION OF COMPONENTS ...... K- 5 FLUID PASSAGE LOCATIONS ........ K- 6 TROUBLESHOOTING .................. K- 8 GENERAL NOTES ................... K- 8 .......... QUICK DIAGNOSIS CHART K- 9 ON-BOARD DIAGNOSIS SYSTEM ...... K- 11 DESCRIPTION ...................... K- 11 PREPARATION ...................... K- 11 ....... DIAGNOSTIC TROUBLE CODE K- 11 .......... MECHANICAL SYSTEM TEST K- 22 PREPARATION ...................... K- 22 STALL TEST ........................ K- 22 TIME LAG TEST ..................... K- 25 LINE PRESSURE TEST .............. K- 26 ROAD TEST .......................... K- 29 D-RANGE TEST ..................... K- 29 S-RANGE TEST ..................... K- 31 ..................... L-RANGE TEST K- 32 . P-RANGE TEST ..................... K- 33 AUTOMATIC TRANSMISSION FLUID (ATF) ................................ K- 35 ATF ................................ K- 35 REPLACEMENT ..................... K- 37 ELECTRICAL SYSTEM COMPONENTS . . K- 38 PREPARATION ...................... K- 38 HOLD SWITCH ...................... K- 38 PARWNEUTRAL SWITCH ............ K- 39 .............. ATF THERMOSENSOR K- 41 VEHICLE SPEED PULSE GENERATOR ...................... K- 41 1-2 SHIFT. 2-3 SHIFT. 3-4 SHIFT. ... 3-2 CONTROL SOLENOID VALVE K- 42 LOCKUP CONTROL SOLENOID ....... VALVE ............................ K- 42 POWERTRAIN CONTROL MODULE (TRANSMISSION) .................. K- 43 TRANSMISSION ....................... K- 46 TRANSMISSION UNIT (REMOVAL) .... K- 46 TRANSMISSION UNlT (DISASSEMBLY) ................... K- 50 TORQUE CONVERTER .............. K- 61 OILPUMP .......................... K- 62 FOURTH GEAR CONNECTING SHELL AND FOURTH GEAR PLANETARY GEAR UNIT (FOURTH GEAR SUN GEAR. FOURTH GEAR PLANETARY PINION CARRIER. FOURTH GEAR CLUTCH HUB) ...... K- 67 DIRECT CLUTCH .................... K- 70 FOURTH GEAR BAND SERVO ........ K- 76 DRUM SUPPORT. ACCUMULATOR. AND FOURTH GEAR CASE ......... K- 79 2ND BAND SERVO .................. K- 83 FRONT CLUTCH .................... K- 86 REAR CLUTCH ...................... K- 91 CONNECTING SHELL AND FRONT PLANETARY GEAR UNlT (REAR CLUTCH HUB. FRONT PLANETARY PINION CARRIER. REAR SUN GEAR) ................. K- 96 REAR PLANETARY GEAR UNlT (CONNECTING DRUM. REAR PLANETARY PINION CARRIER. ONE-WAY CLUTCH) K- 98 LOW AND REVERSE BRAKE K-102 ................ ......... EXTENSION HOUSING AND PARKING MECHANISM ............. K-107 OIL SEAL ........................... K-ill CONTROL VALVE BODY ............. K-112 UPPER VALVE BODY ................ K-116 LOWER VALVE BODY ............... K-120 CONTROL VALVE BODY ............. K-125 VACUUM DIAPHRAGM ............... K-130 TRANSMISSION UNIT (ASSEMBLY) ... K-132 TRANSMISSION UNIT (INSTALLATION) ................... K-147 OIL COOLER .......................... K-151 REMOVAL I INSPECTION I INSTALLATION ..................... K-151 DRIVE PLATE ......................... K-152 PREPARATION ...................... K-152 REMOVAL 1 INSPECTION I INSTALLATION ..................... K-152 SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) ......... K-154 SHIFT-LOCK SYSTEM COMPONENTS K-154 TROUBLESHOOTING ................ K-155 SHIFT-LOCK ........................ K-157 EMERGENCY OVERRIDE BUTTON ... K-157 KEY INTERLOCK .................... K-157 KEY INTERLOCK SOLENOID ......... K-157 KEY INTERLOCK UNIT ............... K-158 P RANGE SWITCH .................. K-159 SHIFT-LOCKACTUATOR ............. K-159 SELECTOR LEVER .................. K-161 HYDRAULIC CIRCUIT .................. K-168 P RANGE ........................... K-168 R RANGE ........................... K-169 N RANGE; BELOW 7 kmlh I4.34 mph) . K-170 N RANGE; ABOVE 9 kmlh (5.58 mph} . K-171 D RANGE; 1 ST GEAR ................ K-172 D RANGE; 2ND GEAR ............... K-173 D RANGE; THIRD GEAR ............. K-174 D RANGE; FOURTH GEAR. LOCKUP ON ....................... K-175 S RANGE; 1 ST GEAR ................ K-176 S RANGE; 2ND GEAR ............... K-177 S RANGE; THIRD GEAR ............. K-178 L RANGE; 1 ST GEAR ................ K-179 L RANGE; 2ND GEAR ................ K-180 Gartner Banana

INDEX, OUTLINE K 1. Hold switch lnspection . . . . . . . . . . . . . . . . page K- 38 Replacement . . . . . . . . . . . . . page K- 39 b 2. ParkINeutral switch lnspection . . . . . . . . . . . . . . . . page K- 39 Adjustment . . . . . . . . . . . . . . . page K- 40 3. Vehicle speed pulse generator lnspection . . . . . . . . . . . . . . . . page K- 41 Replacement . . . . . . . . . . . . . page K- 42 4. ATF thermosensor lnspection . . . . . . . . . . . . . . . . page K- 41 Replacement . . . . . . . . . . . . . page K- 41 5. 1-2 shift, 2-3 shift, 3-4 shift, 3-2 control solenoid valves lnspection . . . . . . . . . . . . . . . . page K- 42 6. Lockup control solenoid valve lnspection . . . . . . . . . . . . . . . . page K- 42 7. Powertrain control module (Transmission) lnspection . . . . . . . . . . . . . . . . page K- 43 Replacement . . . . . . . . . . . . . page K- 45 OUTLINE SPECIFICATIONS 8. Automatic transmission Removal . . . . . . . . . . . . . . . . . page K- 46 Disassembly . . . . . . . . . . . . . page K- 50 Assembly . . . . . . . . . . . . . . . . page K-132 lnstallation . . . . . . . . . . . . . . . page K-147 9. Oil cooler Removal 1 Inspection / lnstallation . . . . . . . . . . . . . . page K-151 10. Drive plate Removal 1 Inspection 1 lnstallation . . . . . . . . . . . . . . page K-152 11. P range switch lnspection . . . . . . . . . . . . . . . . page K-159 12. Shift-lock actuator lnspection . . . . . . . . . . . . . . . . page K-159 13. Selector lever lnspection . . . . . . . . . . . . . . . . page K-161 Adjustment . . . . . . . . . . . . . . . page K-160 Removal / Inspection / lnstallation . . . . . . . . . . . . . . page K-163 Disassembly 1 Inspection / Assembly . . . . . . . . . . . . . . . page K-166 - Model Item - Gear ratio NC4A-EL Torque converter stall torque ratio 1 st 1.900 : 1 2.458 4GR Reverse 0.720 2.182 Number of driveldriven plates Servo diameter (Piston outer diameterketainer inner diam- eter) mm{in} Direct clutch Front clutch Rear clutch Automatic transmission fluid (Am 212 315 515 Low and reverse brake Fourth gear band servo 2nd band servo 4/4 56/36 {2.205/1.417} 72/50 {2.835/1.969} Dexron@II or M-111 7.3 {7.7,6.4} 4.0 {4.2,3.5} Type Capacity L {US qt, Imp qtI Total oil pan Gartner Banana

K OUTLINE FLUID PASSAGE LOCATIONS Transmission Case TO SECOND SERVO RELEASE SlDE TO DIRECT CLUTCH AND FOURTH GEAR SERVO RELEASE SlDE TO SECOND SERVO APPLY SI OIL PUMP DISCHARGE TORQUE CONVERTER PRESSURE TO REAR CLUTCH TO FRONT CLUTC OIL PUMP SUCTION , REAR LUBRICATION TO LOW AND REVERSE BRAKE OIL PUMP SUCTION TO FRONT CLUTCH TO DIRECT CLUTCH AND FOURTH GEAR SERVO RELEASE SlDE TO REAR CLUTCH / OIL PUMP DISCHARGE TORQUE CONVERTER PRESSURE Oil Pump OIL PUMP DISCHARGE FRONT LOCKUP CONTROL OIL PUMP SUCTION SOLENOID VALVE TORQUE CONVERTER PRESSURE 0i PUMP DISCHARGE Gartner Banana

K TROUBLESHOOTING TROUBLESHOOTING GENERAL NOTES A problem with the EC-AT may be caused by the engine, the EC-AT powertrain, the hydraulic control LJ system, or the electronic control system. When troubleshooting, therefore, begin from these points, which can be inspected quickly and easily. The recommended troubleshooting sequence is described below. WHEEL CHOCK 63 TEMPERATURE w-7u'C (1461WF) Step 1 : On-board Diagnosis System Inspection Check for diagnostic trouble code(s) memorized in the powertrain control module (Transmission) with the Self- Diagnosis Checker. (Refer to page K-11 .) Note You can also check the flashing sequence of the hold indicator light for diagnostic trouble code(s). (Refer to page K-1 1 .) Step 2: Mechanical System Test Check the engine stall speed, time lag, and line pres- sure. (Refer to page K-22.) Step 3: Road Test Check the shift point, shift schedule, and shift shock. (Refer to page K-29.) Gartner Banana