6 (GJ) D66M-R Gearbox — MAZDA

🧭 Before you start

Disconnect the battery, remove the engine covers and clear the intake side: air filter, ducting, turbo outlet pipe, throttle body, inlet manifold cover and EGR pipe. Disconnect the shift cables, sensors, solenoid valve, earth, clutch slave cylinder and starter, then remove the wheels, release the suspension joints and pull the drive shafts. Support the subframe, disconnect the steering column, pendulum support and exhaust support and drop the subframe. Fit the engine support tool, remove the bell housing bolts and engine support, and lower the gearbox on a jack. Refill the gearbox and cooling system afterwards.

Fits: platform codes 2.2, SKYACTIV-D, 150, |, 175

• Opens: coolant, gearbox oil
• Renewed: bolt egr pipe

Don't miss

• Fit the engine support tool before removing the engine support and the upper bell housing bolts.
• Renew the throttle body and EGR cooler gaskets and the bolts marked for renewal.
• Disconnect the steering column from the steering box before dropping the subframe.
• Refill the gearbox and the cooling system before the first start.
• On cars with regenerative braking, free the wiring loom from the front cross member first.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📐 18 workshop diagrams for SH

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Disconnect the battery
2. Remove the engine upper cover
3. Remove the engine lower cover (two parts)
4. Disconnect the air filter hoses
5. Disconnect the vacuum hose from the air inlet

6. Renew the gasket
7. Renew the gaskets
8. Renew the gaskets
9. Remove the air filter together with the air duct
10. Disconnect the breather hose
11. Remove the air hose between the turbo and the air filter
12. Remove the turbocharger outlet pipe
13. Throttle body:
14. Remove the throttle body
15. Remove the inlet manifold cover
16. Renew the bolt
17. EGR pipe:
18. Remove the EGR pipe
19. Disconnect the vacuum hose from the vacuum pump
20. Remove the battery securing clamp
21. Remove the battery tray
22. Subframe, rear bolts:
23. Stud bolt(s):
24. Disconnect the gear-shift cables from the gearbox
25. Gear-shift control bracket:
26. Remove the gear-shift control bracket
27. Solenoid valve:
28. Remove the solenoid valve(s)
29. Remove the ground cable from the gearbox
30. Inlet manifold
31. Starter motor
32. Neutral position sensor:
33. Disconnect the neutral position sensor
34. Reversing light switch:
35. Disconnect the reversing light switch from the gearbox
36. Remove the front exhaust bracket from the gearbox (if fitted)
37. Disconnect the wiring loom bracket at the gearbox
38. Move aside
39. Remove both front wheels
40. Unclip the brake hose(s)
41. Wheel speed sensor:
42. Disconnect the wheel speed sensors
43. Disconnect the tie rods
44. Disconnect the stabiliser link(s)
45. Disconnect the lower arm ball joints
46. Remove the drive shafts
47. Clutch slave cylinder:
48. Remove the clutch slave cylinder from the gearbox
49. Disconnect the starter motor electrical connections
50. Remove the starter motor
51. With regenerative braking system:
52. Disconnect the wiring loom from the front cross member
53. All vehicles:
54. Place a trolley jack under the subframe
55. Disconnect the steering column from the steering box
56. Remove the pendulum support
57. Remove the bracket
58. Disconnect the exhaust support
59. Remove the subframe
60. Engine support tool:
61. Fit the special tool to support the engine
62. Remove the engine/gearbox upper attaching bolts
63. Remove the engine support
64. Support the gearbox with a trolley jack
65. Remove the engine/gearbox lower attaching bolts
66. Lower the gearbox slightly
67. Remove the gearbox
68. Refill the cooling system
69. Refill the gearbox

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