1994 MAZDA MX-5 Workshop Manual

M DIFFERENTIAL Thrust washers (Standard) 1. Adjust the backlash of the side gears and pinion gear as follows. (Standard) (1) Set a dial gauge against the pinion gear as shown. ,+, (2) Secure one of the side gears. (3) Move the pinion gear, and measure the backlash at the end of it. If not within specification, replace the dif- ferential gear as an assembly. ("TORSEN" LSD) Standard backlash: 04.1 mm (0-0.004 in) (4) If the backlash exceeds the standard, use the select- able thrust washers for adjustment. 2. Install the new knock pin to secure the pinion shaft. Stake the pin with a punch to prevent it from coming out of the case. Thrust washer thickness: 3. Apply thread-locking compound to bolt threads @ and points @I of the gear back face. Apply approximately 0.04 cm3 I0.04 cc, 0.0024 cu in} of thread-locking com- pound at each point and bolt thread. 4. lnstall the ring gear onto the gear case. Identification mark 0 0.5 1 1.5 2 Tightening torque: 69-83 N.m (7.0--8.5 kgf-m, 51-61 ft-lbf) Thickness 2.00mm i0.0787 in} 2.05mm (0.0807 in) 2.10mm {0.0827 in) 2.15mm (0.0846 in} 2.20mm i0.0866 in} 5. Press the bearing inner races (side bearing) on by using the SST. 6. Install the differential gear assembly in the carrier. 7. Note the identification marks on the adjusting nuts, and install them on their respective sides. 8. lnstall the differential bearing caps, making sure that the identification mark on the cap corresponds with the one on the carrier by using the SST. Then temporarily tighten the bolts. Gartner Banana

DIFFERENTIAL M (1) Mark the ring gear at four points at approx. 90" inter- vals. Mount a dial indicator to the carrier so that the feeler comes in contact at a right angle with one of the ring gear teeth. (2) Turn both bearing adjusters equally by using the SST until the backlash is 0.09-0.11mm {0.0036-€).0043 in). (3) Check the backlash at the three other marked points, and make sure the maximum backlash is less than 0.07mm (0.0028 in). 9. Tighten or loosen the adjusting nuts equally until the dis- tance between the pilot sections on the bearing caps is 185.428-1 85SOmm (7.3004--7.3031 in). 10. Recheck the back lash. Inspection and adjustment of teeth contact 1. Coat both surfaces of 6-8 teeth of the ring gear with a thin coat of red lead. 2. While moving the ring gear back and forth by hand, rotate the drive pinion several times and check the tooth contact. 3. If the tooth contact is good, wipe off the red lead. 4. If it is not good, adjust the pinion height, and then adjust the backlash. (1) Toe and flank contact Replace the spacer with a thinner one to move the drive pinion outward. Gartner Banana

M DIFFERENTIAL I HEEL CONTACT FACE CONTACT I (2) Heel and face contact Replace the spacer with a thicker one to bring the drive pinion in. d Bearing caps 1. Tighten the bearing cap bolts. Tightening torque: 37-52 N-m {3.8-5.3 kgf-m, 27-38 ft4bf) 2. Install the lock plates on the bearing caps. Tightening torque: 18-25 N.m (1.8-2.6 kgf-m, 13-19 ft.lbf) Differential case 1. Apply sealant to the housing face. 2. Tighten the bolts. Tightening torque: 23-26 N.m (2.3-2.7 kgf.m, 17-20 ft.lbf) Output shaft 1. Install a new clip. 2. Install the output shafts into the side gears by lightly tap- ping them with a plastic hammer. 3. Verify that the output shafts are hooked into the side gears by pulling them by hand. Gartner Banana

Before beginning any service procedure. refer to section T of this manual for I air bag system service warnings and audio antitheft system alarm conditions . STEERING SYSTEM INDEX ....................................... N- 2 OUTLINE ..................................... N- 4 SPECIFICATIONS ........................... N- 4 MANUAL STEERING .......................... N- 4 PREPARATION ............................. N- 4 ................ TROUBLESHOOTING GUIDE N- 5 BOOT ...................................... N- 6 STEERING WHEEL AND COLUMN ........... N- 8 ............. STEERING GEAR AND LINKAGE N-12 ENGINE SPEED SENSING POWER STEERING .......................... N-18 PREPARATION ............................. N-18 TROUBLESHOOTING GUIDE ................ N-20 AIR BLEEDING ............................. N-21 POWER STEERING FLUID ................... N-22 STEERING WHEEL AND COLUMN ........... N-24 STEERING GEAR AND LINKAGE ............. N-25 POWER STEERING OIL PUMP ............... N-33 DRIVE BELT ................................ N-37 25UONX-001 Gartner Banana

INDEX INDEX MANUAL STEERING STEERING WHEEL PLAY: [ (MOrnrn (0-1 .I 8 in) ] 1. Boot 3. Steering gear and linkage Replacement ................ page N- 6 Removal 1 Installation ......... page N-12 2. Steering wheel and column Disassembly / Inspection / On-vehicle inspection ......... page N- 8 Assembly .................. page N-13 -, Removal / Installation ......... page N- 9 Disassembly / Inspection / Assembly .................. page N-10 Gartner Banana

INDEX POWER STEERING STEERING WHEEL PLAY: [ 0-30mm (0-1.18 in) ] / DRIVE BELT DEFLECTION I=' I LIMIT: 11.5mm (0.45 in) at 98 N (1 0 kgf, 22 Ibf) 'I =!IS 1. Boot Replacement ................ page N- 6 2. Steering wheel. and column .... On-vehicle inspection pages N- 8,24 Removal / ................... page N- 9 Disassembly / Inspection 1 Assembly .................. page N-10 3. Steering gear and linkage Removal I Installation ......... page N-25 Air bleeding ................. page N-21 Disassembly I Inspection / Assembly .................. page N-26 4. Power steering oil pump ......... Removal / Installation page N-33 ................. Air bleeding page N-21 .......... Power steering fluid page N-22 5. Drive belt ................... Inspection page N-37 .................. Adjustment page N-38 ................ Replacement page N-38 Gartner Banana

N OUTLINEIMANUAL STEERING OUTLINE SPECIFICATIONS Steering wheel Steering shaft and joint d Type Steering gear Outer diameter mm {in) I 370 {I 4.6) I Manual steering Power steering Lock-to-lock turns Shaft ~oinr Power assist 3.36 2-cross joint - I Engine speed sensing Gear Gear ratio 2.8 Rack-and-pinion m (infinite) Rack stroke mm {in} Power steering fluid MANUAL STEERING Collapsible, non-tilt 121 .O i4.76) - I ATF DexronBII or M-111 ~luidca~acit~ L~S qt, Imp qt) I - PREPARATION SST 0.8 (0.85, 0.70) Preload attachment 25UONX-003 Hexagon wrench 49 GO30 797 Handle For removal of tie-rod end 49 1243 785 Installer, boot For measurement of pinion torque For installation of bushing 49 0208 701 A Boot air out tool - For removal and installation of adjusting cover For installation of tie-rod end boot 49 DO32 31 6 Protractor For removal of oil seal For tightening of adjusting cover Gartner Banana

MANUAL STEERING TROUBLESHOOTING GUIDE Problem Steering heavy Posslble Cause Poor lubrication, foreign material, or abnormal wear of steering ball joint Stuck or damaged lower arm ball joints lmproper steering pinion preload Damaged steering gear Malfunction of steering shaft joint lmproperly adjusted wheel alignment Malfunctioning steering gear Replace Replace gear Replace Replace Adjust Replace ~ction- Lubricate or replace section R N-12 N-12 N- 9 section R N-12 ~i&d~ection N-13 General instability while driving Steering wheel pulls to one side Shake (Steering wheel vibrates upidown) Worn or damaged stabilizer and/or suspension arm bushings Dragging brake Loose lower arm lmproperly adjusted wheel alignment lncorrect tire pressure Damaged or unbalanced wheel Worn or damaged steering joints lmproper steering pinion preload Weak front coil spring Worn or damaged stabilizer andlor suspension arm bushings Malfunctioning shock absorber lmproperly adjusted wheel alignment Excessive tire and/or wheel runout Loose lug nuts Unbalanced wheel(s) Incorrect tire pressure Incorrect tire pressure Unevenly worn tires Weak front spring Replace Repair Tighten Adjust Adjust Adjust or replace Replace Replace gear Replace Replace Replace Adjust Replace Tighten Adjust or replace section R section P section R section R section Q section Q N- 9 N-12 section R section R section R section R section Q section Q section Q Adjust Adjust Replace Replace section Q section Q section Q section R I Cracked or worn transmission mount I Cracked or worn engine mount 1 ~e~lace I section B lncorrect tire pressure Unevenly worn tires Malfunction of shock absorber Shimmy (Steering wheel vibrates circumferentially) Excessive steering wheel play Cracked or worn steering gear mount Loose steering gear mounting bolts Stuck or damaged steering ball joint Excessive tire and/or wheel runout Loose lug nuts Unbalanced wheel(s) Adjust Replace Replace Replace Replace Tighten Replace Replace Tighten Adjust or replace section Q section Q section R section J N-12 N-12 N-13 section Q section Q section Q I Loose shock absorber mounting bolts 1 Tighten I section R Stuck or damaged lower arm ball joint Cracked or worn suspension bushings Damaged or worn front wheel bearing lmproperly adjusted front wheel alignment Worn steering gear Worn or damaged steering joints Worn or damaged suspension arm bushings Loose steering gear mounting bolts I lmproperly adjusted front wheel alignment Poor steering wheel return Replace Replace Replace Adjust Replace Replace Replace Tighten Replace Adjust Replace Adjust Worn linkage &-tie-rod ball joint lncorrect tire pressure Stuck or damaged steering joints section R section R section M section R N-12 N- 9 section R N-12 N-12 section Q N- 9 section R Abnormal noise from steering system 25UONX-00! Improper steering pinion preload Ball joint not operating smoothly Steering shaft contacting something Loose steering gear Malfunctioning steering gear Obstruction near steering column Loose steering linkage Worn steering joints Replace gear Replace Repair Tighten Replace Repair or replace Tighten or replace Replace N-12 N-13 N- 9 N-12 N-12 N- 9 N-12 N- 9 Gartner Banana