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    Parts for the
    Jeep AX15 Transmission

    Looking for a complete AX15? Click here. Shop individual AX15 parts on the exploded diagramClick any number on the diagram to find that part · 53 parts available online

    The Jeep AX15 one of the best and most versatile transmissions ever installed in a Jeep. If its due for a rebuild it may well be worth the work.

    The Master Rebuild Kit

    Kit, AX15MR, master rebuild, AX15 transmission

    AX15MR

    It is common for our customers to do top-level rebuild work, using good methods when rebuilding the AX15 transmission.

    We suggest the rebuilder have access to a set of snap ring pliers, a bearing puller and a small press.

    Novak kits include:

    Quality you can count on.

    Our master rebuild kits have been assembled for our customer's rebuilds as well as the thousands of rebuilds we do at Novak. It is the most complete kit we've seen anywhere and features all the consumable and wear item components. Cut-rate "BK" basic kits seen on the market don't hold a candle to the Novak kits' quality and completeness.

    These rebuild kits set the industry standard for reliability, using only premium bearings and seals from proven manufacturers like Timken, JTEKT, Nachi, CR Seals, and more. No single brand makes every part we require, so we hand-select each component to ensure unrivaled performance and longevity.

    We Buy Used AX15 Cores

    The AX15’s enduring popularity keeps core supply tight — we’re always in the market for used units. Pricing varies, so reach out for a quote. If you’re buying from us, just put your old unit in the same box and we’ll handle return shipping. If you have a core (no purchase required), we’ll send you a padded shipping box. Or if you’d like yours rebuilt, ship it to us.

    Contact us to get started →

    Recommended Upgrades


    Novak AX15 Short Throw Shifter

    AX15 Short Throw Shifter Kit

    This is an all-new, all-6061 aluminum shift tower body that raises the pivot point of the AX15 shifter approximately 1", resulting in about a 30% reduction in shift throw. Click here to learn more

    Billet steel bearing retainer plate for AX15 transmissions

    AX15 Rear Bearing Retainer Upgrade (With Hardware)

    This billet steel rear bearing retainer plate replaces the weak factory casting on 1985-up AX15 and R151 transmissions. It prevents flex and wear that can cause end-play and gear misalignment, maintaining proper bearing preload and long-term case rigidity for both stock and upgraded builds.

    Novak's custom 1st gear thrust washer for AX15 transmissions

    AX15 1st gear thrust washer Novak upgraded and hardened, includes pin

    The AX15’s factory thrust washer is a known wear point under heavy load. Our upgraded hardened chromoly thrust washer is precision-machined from high-strength 4130 steel and heat-treated for exceptional surface hardness and fatigue resistance. This eliminates premature wear and end-play issues common in stock units, ensuring smoother operation and long-term durability even in demanding off-road or high-torque applications.

    Gen V bolt-in mounts for TJ Jeeps

    AX15 Low First Gear & Cluster Shaft Conversion Set 4.31:1 ratio

    Upgrade your AX15 manual transmission with a 4.31:1 first gear conversion, engineered to deliver improved low-speed control and increased torque multiplication over the factory 3.83:1 first gear. This gear set is ideal for off-road, rock-crawling, towing, and heavy vehicle applications where enhanced crawl ratio and smoother clutch engagement are critical. Click here to learn more

    Jeep AX15 front input bearing retainer

    AX15 Front Input Bearing Retainer (1994-1999, External Slave)

    This is an external slave type front input bearing retainer off a brand new AX15. It comes with the seal already installed.

    4636382

    AX15 Exploded Parts Diagram

    Click a number on the diagram to find that part, or search the list. 53 of the 92 parts listed can be ordered online — for anything else call 877-602-1500.

    AX15 Transmission exploded diagram
    Pinch or use + to zoom
    Available onlineCall to order / not sold separately
    1. Shift boot
      Not sold separately
    2. Shift knob
      Not sold separately
    3. Shift lever
      YJ 5252055 / TJ 5252042
      Not sold separately
    4. Shifter housing (tower)
      Not sold separately
    5. Shift lever bushing
      #83500519 AX15 Shift Lever Bushing
      In master rebuild kit
      $3.15
    6. Shifter tower gasket
      #5252043 AX15 Shifter Tower Gasket
      In master rebuild kit
      $4.04
    7. Bolt, shifter tower
      Not sold separately
    8. Reverse restrictor pin
      #5252039 AX15 Reverse Restrictor Pin
      $29.95
    9. Shift detent spring, ball & cap
      Not sold separately
    10. Shift detent springs, balls & caps
      #38G25 Detent Poppet Ball, 0.375"
      In master rebuild kit
      Detent balls
      $0.89
    11. Backup light switch
      #83500629 AX15 Transmission Backup Light Switch
      $52.25
    12. Fill plug
      Not sold separately
    13. Input shaft snap ring
      #83506214 Ring, snap, retaining, external, input shaft to input bearing, AX15 transmission, .085”, B
      Call to order
    14. Bolt, front bearing retainer
      Not sold separately
    15. Front bearing retainer
      #4636382 AX15 Front Input Bearing Retainer (1994-1999, External Slave)
      Call to order
    16. Countershaft snap ring
      Not sold separately
    17. Front case half
      Not sold separately
    18. Drain plug
      Not sold separately
    19. Roll pin
      Not sold separately
    20. Case bolts
      Not sold separately
    21. Reverse restrictor pin
      #5252039 AX15 Reverse Restrictor Pin
      $29.95
    22. Rear case
      Not sold separately
    23. 3rd gear needle bearing
      #83506077 AX15 3rd Gear Bearing
      In master rebuild kit
      $31.95
    24. 3rd gear
      #AX15-11 AX15 3rd Gear
      $128.75
    25. Synchronizer ring, 3rd/4th
      #83506253 AX15 3rd/4th/5th Synchronizer Ring non updated 5th
      In master rebuild kit
      $12.95
    26. Synchronizer slider, 3rd/4th
      #AX15-15 AX15 3rd-4th Slider
      $113.50
    27. Synchronizer springs, 3rd/4th
      #83506255 AX15 3rd–5th Synchronizer Springs, Updated
      In master rebuild kit
      $5.00
    28. Synchronizer hub, 3rd/4th
      #83506248 AX15 3rd/4th Synchronizer Hub
      $94.25
    29. Synchronizer keys, 3rd/4th
      #83506251 AX15 3rd/4th Synchronizer Key
      In master rebuild kit
      $4.73
    30. Snap ring
      Not sold separately
    31. Synchronizer ring, 3rd/4th
      #83506253 AX15 3rd/4th/5th Synchronizer Ring non updated 5th
      In master rebuild kit
      $12.95
    32. Input shaft needle bearing
      #83506078 AX15 Input Shaft Bearings, needle rollers 4th gear
      In master rebuild kit
      $29.00
    33. Input shaft, 1992–99 (large pilot)
      #4636370 AX15 Input Shaft, 1992-1999, large pilot tip
      $163.75
    34. Input shaft, 1988–91
      #5252081 AX15 Input Shaft (1988-1991) NLA
      Call to order
    35. Input bearing, sealed
      #DG4092ARKBD AX15 Input Bearing, deep ball roller, sealed
      In master rebuild kit
      $64.00
    36. Input bearing outer snap ring
      Not sold separately
    37. Input shaft bearing snap ring
      Not sold separately
    38. Shift fork, 1st/2nd
      Mopar 5252057
      Not sold separately
    39. Shift fork, 3rd/4th
      Mopar 5252058
      Not sold separately
    40. Reverse arm
      Not sold separately
    41. Reverse lever
      Mopar 5252060
      Not sold separately
    42. Shift fork, 5th
      Not sold separately
    43. Shift rail, reverse
      Mopar 5252065
      Not sold separately
    44. Shift selector
      Not sold separately
    45. Shift rails, 1st–5th
      Not sold separately
    46. Countershaft snap ring
      Not sold separately
    47. Countershaft bearing snap ring
      Not sold separately
    48. Countershaft front bearing
      #25RTK59SN AX15 Countershaft Bearing, deep ball roller
      In master rebuild kit
      $32.95
    49. Cluster gear, 1992–99 (snap-ring style)
      #AX15-8 AX15 Cluster Gear, 1992-1999 (snap ring)
      $370.00
    50. Cluster gear, 1987–99
      #4636371 AX15 Cluster Gear, 1987-1999, L43-L32-L21-S13-L12
      $246.00
    51. Countershaft rear bearing
      #34RUKS64NR-J AX15 Rear Countershaft Bearing
      In master rebuild kit
      $26.95
    52. Cluster gear thrust washer
      #83506245 AX15 cluster gear thrust washer
      In master rebuild kit
      $11.95
    53. 5th gear needle bearing (countershaft)
      #83506079 AX15 5th Gear Bearing
      In master rebuild kit
      $31.00
    54. 5th gear, countershaft (with hub)
      #4637535 Gear, 5th, AX15 countershaft, includes hub
      Call to order
    55. Synchronizer spring, 5th
      #83506255 AX15 3rd–5th Synchronizer Springs, Updated
      In master rebuild kit
      $5.00
    56. Synchronizer keys, 5th — updated
      #4637532 AX15 5th Gear Synchronizer Key, updated, 1992-1999
      In master rebuild kit
      $3.90
    57. Synchronizer slider, 5th
      #83506257 AX15 5th Gear Slider
      $74.75
    58. Synchronizer ring, 5th — updated
      #4637533 AX15 5th Gear Synchronizer Ring, 1992-1999, Updated
      In master rebuild kit
      $25.95
    59. 5th gear synchronizer cone, splined
      #83506242 AX15 5th Gear Synchronizer, Splined
      $83.25
    60. Nut / snap ring
      Not sold separately
    61. Reverse idler gear
      #5252084 AX15 Reverse Idler Gear, 1987-1989
      $96.00
    62. Reverse idler shaft
      #83506258 AX15 Reverse Idler Shaft, 1987-1999
      $41.95
    63. 2nd gear needle bearing
      #83506076 AX15 2nd Gear Bearing
      In master rebuild kit
      $28.95
    64. 2nd gear
      #4636369 AX15 2nd Gear
      Call to order
    65. Synchronizer ring, 1st/2nd
      #83506252 AX15 1st-2nd Synchronizer Ring
      In master rebuild kit
      $14.95
    66. Synchronizer springs, 1st/2nd
      #83506254 AX15 1st–2nd Synchronizer Springs
      In master rebuild kit
      $2.50
    67. Synchronizer keys, 1st/2nd
      #83506250 AX15 1st/2nd Synchronizer Key
      In master rebuild kit
      $3.47
    68. Synchronizer hub, 1st/2nd
      #83506247 AX15 1st/2nd Synchronizer Hub
      $76.00
    69. Synchronizer slider, 1st/2nd & reverse
      #5252082 AX15 1st-2nd & Reverse Slider
      $157.25
    70. Synchronizer ring, 1st/2nd
      #83506252 AX15 1st-2nd Synchronizer Ring
      In master rebuild kit
      $14.95
    71. 1st gear
      #4636368 AX15 1st Gear, 1988-1999
      $209.00
    72. Low 1st gear & cluster conversion set, 4.31:1
      #AX15-LOW AX15 Low First Gear & Cluster Shaft Conversion Set 4.31:1 ratio
      Novak upgradeBackordered until Oct 31
      This item is on Pre-Order. Expected Ship date end of October 2026
      $529.00
    73. 1st gear needle bearing
      #83506075 AX15 1st Gear Bearing, caged needles
      In master rebuild kit
      $39.00
    74. 1st gear thrust washer — Novak hardened, with pin
      #83506246-N AX15 1st gear thrust washer Novak upgraded and hardened, includes pin
      Novak upgrade
      $54.00
    75. Mainshaft rear bearing
      #DG3585ARKMD AX15 Output Bearing
      In master rebuild kit
      $31.95
    76. Mainshaft rear bearing snap ring
      Not sold separately
    77. Mainshaft snap ring
      Not sold separately
    78. Mainshaft, 4WD 23-spline
      #83506243 AX15 Main Shaft, 4WD, 16-1/8" Long, 23 Spline
      $209.00
    79. 5th gear, mainshaft
      #5252083 AX15 5th Gear Mainshaft
      $65.75
    80. Snap ring
      Not sold separately
    81. Rear bearing retainer — Novak upgrade with hardware
      #5252036-N-K AX15 Rear Bearing Retainer Upgrade (With Hardware)
      Novak upgrade
      $139.00

    Also for the AX15 — not pictured

    1. Input oil seal
      #5252053 AX4/AX5/AX15 Input Oil Seal
      In master rebuild kit
      $21.99
    2. Rear output oil seal, 4WD
      #83503108 AX4/AX5/AX15 4WD Rear Output Oil Seal
      In master rebuild kit
      $16.95
    3. Rear output oil seal, 2WD
      #710198 AX4/AX5/AX15 2WD Rear Output Oil Seal
      $22.95
    4. Shift retainer seal
      #4864226X Seal, AX15, shift retainer
      In master rebuild kit
      Call to order
    5. Shifter tower oil shield plate
      #4864224 Shield plate, oil, AX15 shifter tower
      $11.67
    6. Cluster shaft to case oil receiver
      #83500646 AX15 Cluster Shaft to Case Oil Receiver
      $14.95
    7. Speedometer / cluster shaft ball, 1/8"
      #1000-109-001 Ball, speedo gear , T18 shifter housing, AX15 cluster shaft, 1/8"
      In master rebuild kit
      Call to order
    8. Front face gasket, six-bolt transfer cases
      #7347-HP132 Gasket, six bolt front face transfer cases
      In master rebuild kit
      Call to order
    9. Short throw shifter kit
      #K-AX15-ST AX15 Short Throw Shifter Kit
      Novak upgrade
      $375.00
    10. Shifter cane — Novak straight
      #53002006-N Shifter Cane, AX15, Novak Straight
      Novak upgrade
      $87.25
    11. Short throw shifter rebuild kit
      #AX15-ST-MR AX15 Short Throw Master Rebuild Kit
      $35.00

    Also See