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Thread: Overdrive help. popping out of gear and grinding.

  1. #11
    Super Moderator bmorgil's Avatar
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    I think it looks good 56. Some clean up as you said and reassembly with all the parts should do it. Some wear on the collar but no chipping.

    The "stick out" everyone refers to, sets the total end play for the overdrive gearset. There needs to be some and not too much. Too much and it will pop out of gear. Too little and when it gets hot it will lock up. It doesn't need much, I don't know the spec, but I would guess it is somewhere around .010". You might be able to pull the PTO cover after install, and check the end play there.

  2. #12
    Super Moderator LarrBeard's Avatar
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    Those were fantastic pictures - great job!

  3. #13
    Senior Member 56willys's Avatar
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    Quote Originally Posted by LarrBeard View Post
    Those were fantastic pictures - great job!
    Thank you sir! I lucked out with good lighting. Not really sure how/why but they did turn out good

  4. #14
    Senior Member 56willys's Avatar
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    Quote Originally Posted by bmorgil View Post
    I think it looks good 56. Some clean up as you said and reassembly with all the parts should do it. Some wear on the collar but no chipping.

    The "stick out" everyone refers to, sets the total end play for the overdrive gearset. There needs to be some and not too much. Too much and it will pop out of gear. Too little and when it gets hot it will lock up. It doesn't need much, I don't know the spec, but I would guess it is somewhere around .010". You might be able to pull the PTO cover after install, and check the end play there.
    I'll try to call Herm someday and get the correct specs and a synchro. Then see how it does.

  5. #15
    Super Moderator LarrBeard's Avatar
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    You could even see the cat hair on them

  6. #16
    Senior Member 56willys's Avatar
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    Okay, back to work on the overdrive. I had put the stock gear back in it before, so I was able to drive it. Then got busy and never worked on the overdrive since. But now that the body is getting closer to being done and I'll have Flossy on the road this summer, I really need to figure this od out. So I put the planetary gears in and there seems to be alot of forward-backard movement. I don't know if this is normal?

    With it pushed in the spacing is 0.511
    Pulled out is. 0.558.

    Seems really far from the .677 it's supposed to be. I did get a synchro from KW, so all I need is confirmation on the spacing. I'd like to hear your thoughts then I'll try to call Herm on Monday.
    Last edited by 56willys; 04-28-2024 at 10:57 AM.

  7. #17
    Super Moderator bmorgil's Avatar
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    Like we discussed back a few posts 56', I think that number range is .667 to .680. Give Herm a call to verify. This number sets the end play of the unit. It needs about .010". A better way than stick out would be to actually measure the end play on the assembled unit. I am not sure if you can do that through the P.T.O. cover or not. If you can, that is the way to set it. Herm should have spacers to set the end play or "stick out".

  8. #18
    Senior Member 56willys's Avatar
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    Alright, just got off the phone with Herm. So he said its likely the collar gears are worn and thats causing it to not work. I told him i was missing the synchro, and that really didnt concern him, like that was the problem. He said that if all else fails, since it worked in overdrive to just keep it in that gear for road driving. And i'd still have low enough gears for offroading. He said i can get arbor shims from Mcmaster-carr, or he'll send me some. And spacing it out might help.

  9. #19
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    It kind off depends on the kind of off road use. I have spent a lot of time on trails in 4-low with the overdrive engaged. The vehicle at the time was a CJ5 with the V6.
    Jeff
    '51 CJ3A
    '47 CJ2A

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