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MJ Tech: Modification and Repairs

For all your Comanche (MJ) needs.  An excellent place to ask questions, and to discuss modifications and issues.

32280 topics in this forum

  1. 89's battery just has a constant pull on it and I can't find it

    By David P.,
    • 10 replies
    • 1.1k views

  2. GM 3.8 Supercharger on a 4.0

    By 89 MJ,
    • 23 replies
    • 6.4k views

  3. Speedo won't work after trans swap - please advise

    By ShitboxTechnical,
    • 6 replies
    • 809 views

  4. OEM towhooks

    By 89 MJ,
    • 5 replies
    • 777 views

  5. Any original buyers seen this at the dealership?

    By Strokermjcomanche,
    • 4 replies
    • 855 views

  6. Not starting issues

    By CGCWO,
    • 2 replies
    • 708 views

  7. fuel pump

    By reevesmanche87,
    • 3 replies
    • 729 views

  8. 1990 Jeep Comanche 2.1 renault manual transmission

    By renzo1234567,
    • 15 replies
    • 2k views

  9. 2wd axle parts vs 4wd

    By rylee144,
    • 14 replies
    • 1.1k views

  10. 89 Comanche 2wd

    By Yoopermanche20,
    • 7 replies
    • 1.3k views

  11. (Manual) Pedal Assembly Question - Broken Weld

    By 86Redline,
    • 15 replies
    • 971 views

  12. "New" 89 MJ, just needs a little (LOT) TLC

    By Submariner,
    • 6 replies
    • 797 views

  13. which steering wheel puller do you own?

    By Pete M,
    • 15 replies
    • 985 views

  14. Center cap

    By Jay21,
    • 1 reply
    • 14.7k views

  15. Leaking Injector - Injector or O-ring?

    By 87MJJeep,
    • 13 replies
    • 1.9k views

  16. Jack weight

    By Jay21,
    • 8 replies
    • 969 views

  17. Steering wheel swap

    By Whitaker717,
    • 4 replies
    • 564 views

  18. Will not start, Fuel pump problem

    By Tyson Josh,
    • 9 replies
    • 906 views

  19. MJ Bumper options 1 2

    By Tex06,
    • 47 replies
    • 7.3k views

  20. What are these? on a 89 comanche under dash electronics?

    By Submariner,
    • 5 replies
    • 833 views

  21. Gauge cluster swap

    By Overlandmark2020,
    • 8 replies
    • 970 views

  22. Renix 4.0 fuel rail regulator?

    By Joe Doviak,
    • 3 replies
    • 779 views

  23. My 89 quit and won't start now 1 2 3

    By vfb,
    • 57 replies
    • 5.8k views

  24. Xj ax15-231 driveshaft on mj

    By Sly_Jeeper,
    • 3 replies
    • 578 views

  25. I steam cleaned my Comanche Steering wheel. Here is the video

    By ogjeep,
    • 14 replies
    • 918 views
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