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Thread: 1970 Jeep J-200

  1. #71
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    More doubler pics

    Grinding the the rear 205 shift rail. This will let me put it in front wheel drive only.
    20200422_170013[1].jpg

    The doubler put together
    20200422_194047[1].jpg

    Someone installed a bolt that was too long and it hit the gears inside breaking off a piece and bending it. There was 2 like this and both bolt holes stripped out when I removed them. I plan to install a couple of helicoils for the repair.
    20200419_160600[1].jpg

    After I put everything together I realized the threaded portion of the shifter shaft was broken off.I think I can drill and tap and install a threaded stud for the fix.
    20200423_103211[1].jpg
    Last edited by Trailabite; 04-24-2020 at 01:13 PM.

  2. #72
    Super Moderator bmorgil's Avatar
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    Looking good! Love those loose rollers. They are substantially stronger however. I'll take loose rollers over caged rollers any day. The only advantage to the cage is the speed of assembly.

  3. #73
    Super Moderator gmwillys's Avatar
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    Looking good!

  4. #74
    Super Moderator LarrBeard's Avatar
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    "Doubler?"

    OK, is a doubler a special designation for an overdrive - maybe a 50% OD?

  5. #75
    Super Moderator gmwillys's Avatar
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    Go the other direction, or underdrive. The doubler will make a 2:1 to a 4:1, making the vehicle idle straight up and over an obstacle.

  6. #76
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    Quote Originally Posted by gmwillys View Post
    Go the other direction, or underdrive. The doubler will make a 2:1 to a 4:1, making the vehicle idle straight up and over an obstacle.
    At least, that's the plan lol. I will also have the capability of just locking in the front axle and leaving the rear axle in neutral, which can help when you get in a bind and just need to move the front end over a few inches.

  7. #77
    Senior Member 5JeepsAz's Avatar
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    This build getting better and better! Learned about a doubler. Sounds like something good. Does it have a lever, using the clutch?
    Last edited by 5JeepsAz; 05-01-2020 at 05:59 AM.

  8. #78
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    Quote Originally Posted by 5JeepsAz View Post
    This build getting better and better! Learned about a doubler. Sounds like something good. Does it have a lever, using the clutch?
    The doubler is built by using two separate transfer cases. An NP205 and the front half of an NP203. The NP205 has the normal 2h/4h to 2lo/4lo, so that uses two shifters, one for the front axle and one for the rear axle and then the NP203 bolts to the front of the NP205 and is only used for an extra hi/lo gear, which is what reduces the gearing from 2:1 to 4:1, and this get's one shifter as well. So, three shifters in all. No clutches involved.

    20200426_170414[1].jpg

  9. #79
    Senior Member 5JeepsAz's Avatar
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    New bucket list item - Drive one of these Doublers

    Awesome. New bucket list item. Drive one of those things in your picture there. Hope you keep posting when that thing is installed. I have always wondered what the picture below did, now I have a better idea. Thanks!
    Attached Images Attached Images

  10. #80
    Super Moderator bmorgil's Avatar
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    That thing should crawl straight up a wall!

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