Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Mazda RX8 2RTR-1.3LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Adjustments
TRANSMISSION RANGE (TR) SWITCH ADJUSTMENT
Caution:
^ Water or foreign material entering the connector can cause poor connections or corrosion. Be sure that water or foreign material do not enter the connector when disconnecting it.
1. Remove the engine cover.
2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Remove the catalytic converter.
5. Remove the insulator.
6. Mark the manual shaft lever component.
7. Separate the manual shaft lever component from selector lever.
8. Disconnect the TR switch connector.
9. Rotate the manual shaft to the N position.
Caution:
^ Do not use an impact wrench. Hold the manual shaft lever when removing the manual shaft nut, otherwise the transmission may be damaged.
10. Set the adjustable wrench to hold the manual shaft lever.
11. Remove the manual shaft nut.
12. Remove the washer and manual shaft lever component.
13. Loosen the TR switch mounting bolts.
Caution:
^ Improper adjustment of the TR switch will cause abnormal operation of the automatic transmission. Be sure to use the SST to adjust the TR switch correctly.
14. Using the SST and by turning the TR switch, adjust the positions of the manual shaft and the TR switch neutral hole.
15. Tighten the TR switch mounting bolts.
Tightening torque 4.4 - 6.5 Nm (45 - 66 kgf-cm, 40 - 57 inch lbs.)
16. Inspect for continuity between TR switch terminals C and D.
17. Remove the SST.
18. Install the manual shaft lever component and washer.
Caution:
^ Do not use an impact wrench. Hold the manual shaft lever when tightening the manual shaft nut, otherwise the transmission may be damaged.
19. Set the adjustable wrench to hold the manual shaft lever.
20. Tighten the manual shaft nut using a torque wrench.
Tightening torque 23 - 33 Nm (2.3 - 3.4 kgf-cm, 17 - 24 ft. lbs.)
21. Shift the selector lever to P position.
22. Turn the manual shaft lever to P position.
23. Inspect TR switch continuity.
24. Connect the TR switch connector.
25. Align the mark of the manual shaft lever component.
26. Install the manual shaft lever component installation nut.
Tightening torque 10.8 - 14.7 Nm (1.1 - 1.4 kgf-cm, 8.0 - 10.8 ft. lbs.)
27. Install the insulator.
Tightening torque 8 - 11 Nm (82 - 112 kgf-cm, 72 - 97 inch lbs.)
28. Install the catalytic converter.
29. Connect the negative battery cable.
30. Install the battery cover.
31. Install the engine cover.
32. Inspect TR switch operation.
Caution:
^ Water or foreign material entering the connector can cause poor connections or corrosion. Be sure that water or foreign material do not enter the connector when disconnecting it.
1. Remove the engine cover.
2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Remove the catalytic converter.
5. Remove the insulator.
6. Mark the manual shaft lever component.
7. Separate the manual shaft lever component from selector lever.
8. Disconnect the TR switch connector.
9. Rotate the manual shaft to the N position.
Caution:
^ Do not use an impact wrench. Hold the manual shaft lever when removing the manual shaft nut, otherwise the transmission may be damaged.
10. Set the adjustable wrench to hold the manual shaft lever.
11. Remove the manual shaft nut.
12. Remove the washer and manual shaft lever component.
13. Loosen the TR switch mounting bolts.
Caution:
^ Improper adjustment of the TR switch will cause abnormal operation of the automatic transmission. Be sure to use the SST to adjust the TR switch correctly.
14. Using the SST and by turning the TR switch, adjust the positions of the manual shaft and the TR switch neutral hole.
15. Tighten the TR switch mounting bolts.
Tightening torque 4.4 - 6.5 Nm (45 - 66 kgf-cm, 40 - 57 inch lbs.)
16. Inspect for continuity between TR switch terminals C and D.
17. Remove the SST.
18. Install the manual shaft lever component and washer.
Caution:
^ Do not use an impact wrench. Hold the manual shaft lever when tightening the manual shaft nut, otherwise the transmission may be damaged.
19. Set the adjustable wrench to hold the manual shaft lever.
20. Tighten the manual shaft nut using a torque wrench.
Tightening torque 23 - 33 Nm (2.3 - 3.4 kgf-cm, 17 - 24 ft. lbs.)
21. Shift the selector lever to P position.
22. Turn the manual shaft lever to P position.
23. Inspect TR switch continuity.
24. Connect the TR switch connector.
25. Align the mark of the manual shaft lever component.
26. Install the manual shaft lever component installation nut.
Tightening torque 10.8 - 14.7 Nm (1.1 - 1.4 kgf-cm, 8.0 - 10.8 ft. lbs.)
27. Install the insulator.
Tightening torque 8 - 11 Nm (82 - 112 kgf-cm, 72 - 97 inch lbs.)
28. Install the catalytic converter.
29. Connect the negative battery cable.
30. Install the battery cover.
31. Install the engine cover.
32. Inspect TR switch operation.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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