Challenge Model 08 Gearbox (12 Bolt)
| MTM PART | ZF PART | DESCRIPTION | |
| NPN | 1640320 | SEAL AND SHIM KIT | |
| NPN | 1640320 | BEARING KIT | |
| 1. | NPN | 5062244 | HOUSING OUTPUT |
| 2. | 0016099 | 1300497 | CUP BEARING |
| 3. | 0016082 | 1300496 | CUP BEARING |
| 4. | 0014480 | 5062153 | STUD |
| 5. | NPN | 5062256 | CAGE PLANETARY |
| 6. | 0016098 | 1300494 | CONE-BEARING |
| 7. | NPN | 1670548 | GEAR-PLANET |
| 8. | 0016475 | 5062261 | SHAFT PLANET GEAR |
| 9. | 0012863 | 4060592 | SHIM KIT |
| 10. | 0016905 | 5062245 | PLATE OUTPUT SHAFT |
| 11. | 0016094 | 1300490 | BEARING ASSEMBLY |
| 12. | 0016906 | 5062246 | PLATE PLANET GEAR SHAFT |
| 13. | 0016692 | 1032523 | CAP SCREW |
| 14. | 0016950 | 1670553 | OUTPUT SHAFT |
| 15. | 0016083 | 1300495 | CONE-BEARING |
| 16. | 0016951 | 1670555 | SOCKET, FRONT TRUNNION |
| 17. | 0016952 | 1670556 | SOCKET, REAR TRUNNION |
| 18. | 0003307 | 4060034 | SHIM KIT |
| 19. | 0016889 | 1690740 | O-RING |
| 20. | 0016693 | 1032059 | CAP SCREW |
| 21. | 0016406 | 5062247 | RING RETAINER |
| 22. | 0013827 | 1050362 | LOCKWASHER |
| 23. | 0013759 | 1030249 | JAM NUT |
| 24. | 0016890 | 5062903 | O-RING (SPECIFY 3/8 OR 7/16) |
| 25. | 003308 | 4060593 | SHIM KIT |
| 26. | 0014709 | 1032057 | HEX HEAD CAP SCREW |
| 27. | NPN | 5061871 | HOUSING OUTPUT |
| 28. | 0016096 | 1300492 | BEARING |
| 29. | 0016095 | 1300491 | BEARING |
| 30. | 0016754 | 1670540 | DRIVEN GEAR FIRST STAGE |
| 31. | 0015913 | 1573710 | PLUG |
| 32. | 0016536 | 1670551 | SHAFT SECOND STAGE |
| 33. | 0016468 | 1050177 | SNAP RING |
| 34. | 0016532 | 1670538 | SUN GEAR |
| 35. | 0016533 | 1670539 | DRIVEN GEAR SECOND STAGE |
| 36. | 0016093 | 1300489 | BEARING |
| 37. | 0016407 | 5062150 | O-RING |
| 38. | 0016534 | 1670547 | RING GEAR |
| 39. | 0015822 | 1032281 | CAP SCREW |
| 40. | 0015824 | 1032422 | CAP SCREW |
| 41. | 0016253 | 1032054 | BOLT |
| 42. | 0016697 | 1031852 | BOLT |
| 43. | 0014710 | 1032056 | BOLT |
| 44. | 0014724 | 1031896 | HEX NUT |
| 45. | 0016198 | 5062248 | BRACKET, LIFTING |
| 46. | 1112318 | 1300493 | BEARING |
| 47. | 0016933 | 5062249 | RETAINER-BEARING |
| 48. | 0016875 | 1690231 | O-RING |
| 49. | 0016934 | 1050982 | RETAINING RING |
| 50. | 0016535 | 1670549 | SHAFT-INPUT |
| 51. | 0016391 | 1051036 | GROOVE PIN |
| 52. | NPN | H-70-568-114 | O-RING |
| 53. | 0014440 | 1573971 | PLUG |
| 54. | 0016910 | 1574915 | DRAIN PLUG |
| 55. | 0016593 | 1170261 | SIGHT GAUGE |
| 56. | 0016540 | 5062251 | RETAINER |
| 57. | 0015924 | 1570526 | ELBOW |
| 58. | 0014632 | 1690909 | BREATHER |
| 59. | 0016377 | 5062250 | WASHER-SPACER |
| 60. | NPN | 5070696 | NAME PLATE |
| 61. | NPN | 1030680 | DRIVE SCREW |
| 62. | NPN | 1051129 | ROLL PIN |