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Automatic Swap Feasible?

Discussion in 'Intermediate CJ-5/6/7/8' started by Iandavidh, Oct 30, 2019.

  1. Oct 30, 2019
    Iandavidh

    Iandavidh Member

    California
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    Soooooo my clutch just took a dump in the middle of a busy intersection of course lol.

    my options are either take it apart, new clutch, resurface flywheel, and I might need to rebuild the T18 transmission. I believe I was quoted $1300 minus a trans rebuild.

    Or an automatic swap. Good idea? Bad idea? I’ve done some loose measurements for a TH350 and it is within a few inches of my current configuration. Will the cost far outweigh that of keeping the manual? 90% of my driving is street since I daily the Jeep and the T18 shifts like a dump truck.
    What all goes into the swap other than the obvious like trans, flywheel, torque converter, trans tunnel, new driveshafts?, adapters, kick down cable, and new flywheel?

    I’ve done some research into the swap but I’d like to know what the masses think.

    Thanks for your help everyone
     
  2. Oct 30, 2019
    47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    USA
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    Its a lot of work. If you can't do a clutch job and a transmission rebuild by yourself, an auto transmission will be a tough project.
     
  3. Oct 30, 2019
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
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    Changing a clutch is simple. I wouldn’t resurface the flywheel unless it needs it.
     
  4. Oct 30, 2019
    Dphillip

    Dphillip Member

    Omaha NE
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    It is indeed a lot of work and expensive but it can be done. In addition to the new components you mentioned you’ll also need a shifter, trans cooler and possibly a custom cross member.
     
  5. Oct 30, 2019
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
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    A while back you posted about a disappearing clutch pedal. I say pull it apart and fix it right.....
     
  6. Oct 31, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    There's some discussion on the Novak site about automatic swaps for the CJ. Note that Jeep never offered the CJ-5 with an automatic, since they considered it impractical. The CJ-7 was introduced specifically to provide the longer wheelbase needed for an automatic transmission.

    Why do you think the T-18 needs rebuilding? They are strong - originally meant for medium trucks like dump trucks and buses. They are also noisier than passenger car transmissions, and I would not touch it unless it's making an epic whine or clashing gears on normal shifts. Plus transmissions are easy to R&R in CJ-5s, and there's not a lot of effort lost by just putting it back ... you going to do the work yourself? It's hard to own an old car like this unless you can work on it yourself, or you have deep pockets and a reliable mechanic. JMO.
     
    Last edited: Oct 31, 2019
  7. Oct 31, 2019
    Iandavidh

    Iandavidh Member

    California
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    I can do the smaller stuff but I don’t yet trust my teenage self to do a clutch job. Plus my input shaft bearing is making noise.
     
  8. Oct 31, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Replacing the front main bearing of a T-18 does not require a rebuild. Here's a link to a thread about me replacing the front main bearing on my J20's T-18. Not exactly the same, but should give you an idea of what's involved. T-18 in the driveway - Full Size Jeep Network
     
  9. Oct 31, 2019
    Iandavidh

    Iandavidh Member

    California
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    Thanks
     
  10. Oct 31, 2019
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    put a clutch in . be happy
     
  11. Oct 31, 2019
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    Lots of new owners without experience are intimidated by the thought of working on this stuff but these things really are super simple to work on- dig in & learn. :)
     
    colojeepguy, ITLKSEZ and 47v6 like this.
  12. Oct 31, 2019
    47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

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    We were all once teenagers with broken stuff to fix. How do you think we learned?
     
    Twin2, colojeepguy and ITLKSEZ like this.
  13. Oct 31, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    do you have a garage or good place to work on it and how much time can it be un-driveable? that would be my only concern to doing it yourself is if you don't have a good place to work or its your DD and you need back on the road asap....Pulling the transmission/TC and replace the clutch yourself is a very doable job for a novice (pretty much the first jeep work i ever did). Plus, even if you want to pay for someone to rebuild the transmission, you will save a lot of labor costs if you do the removal and install work....this is what I did on my first clutch job. I did the removal, clutch replacement, and install....and in between, took the transmission to a local shop for rebuild. I saved almost half the cost on the rebuilt doing it this way as a lot of the labor cost is in the removal and install. As others have said, depending on what needs work with the transmission, it may be a very simple job you can do yourself.
     
    47v6 likes this.
  14. Oct 31, 2019
    '74Renegade

    '74Renegade Active Member

    Fair Oaks, CA
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    I rebuilt my T18 in my parents garage in my early 20s with zero transmission experience and basic hand tools. Still going strong after 25 years. If your not afraid to take things apart and with the new parts on hand a clutch job should be fairly simple.
     
  15. Oct 31, 2019
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I question the need to rebuild the t18. Pull the jeep apart and check things out. Unless there is a ton of miles on it..... or is was abused in some way..... its a heavy truck trans that came stock in a 3K lbs jeep.
    I'd be willing to bet that the input bearing noise is actually the release bearing noise stemming from your clutch issues way back here...Clutch Linkage Pedal Height Disappearing?

    Not trying to pick on you.... but the auto swap is way more complicated than this lil clutch job. Clutch kit is $100, Get a machine/engine shop to surface the flywheel... prob $40. Then get your clutch release issues straightened out. You will understand it more once you've torn it apart and should be able to get it functioning properly.
     
    47v6 likes this.
  16. Oct 31, 2019
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
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    I learn the mechanic working on my cj5....before that i didnt even knew how clutch work. It's all simple mechanic....search forum and tutorial and it will be an easy job :)
     
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