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Downshifting Issue

Discussion in 'Transmission / Drive' started by 429CV23, Jul 6, 2016.

  1. 429CV23

    429CV23 Member

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    Today the Dog started giving me problems downshifting. At times I'll have to push the shifter 4-5 times before it will drop into the next lower gear, a few times it shifted from 5th to neutral or 4th to neutral.
    I changed the trans oil within the last 1200mi using Royal Purple; checked the level and she's still full and purple.
    There are no issues with upshifting.
    Is this a failing shift fork?

    2000 Bulldog; 107" S&S; assuming an original Andrew's geared 5spd.
     
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  2. Mr. Wright

    Mr. Wright Guru
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    Check this nut and see if it is loose, it is the adjustment nut for your shift forks. Don't screw around with it, just check and see if it is loose. Then check the eyelets on the shift rod, and make sure that their not froze up. Then we can go from there.
    [​IMG]
     
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  3. cdogg556

    cdogg556 Guru

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    See the allen bolt at the bottom of the shift lever, that was loose on my bike, I was having a hard time getting into neutral, tightened it up and it works great!:old2:
     
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  4. Bdm4ever

    Bdm4ever Well-Known Member
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    Good tip John. Think I'll check mine as well..

    276629793.gif
     
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  5. cdogg556

    cdogg556 Guru

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    :agree: dat's fur sur Paul! :yesnod::old2:Whenever I find something loose or broken usually it's when I am cleaning the bike !:old2::cheers:
     
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  6. Mr. Wright

    Mr. Wright Guru
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    How about an update Jeff
     
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  7. 429CV23

    429CV23 Member

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    Thanks for the info guys!
    Here's an update; didn't have time to get to her last night, the wife wanted to remove the stakes and wires on three of the big ponderosas we had moved a few years ago from the back of the property to the front. Sorry, first wife took priority. ;)

    I started tonight by adjusting the clutch; loosening the cable, removing the freeplay from the pushrod, backed it off 1/2 turn, adjusted the cable so I have about 1/16" play in the cable at the lever. When I started, there didn't seem to be any freeplay in the cable, just some freeplay in the lever itself.

    Moved on to the shift pawl. The locking nut was loose. I never could get equal spring tension for both upshift and downshift directions, but set it so there was equal travel. There is spring tension against upshifting, but really none against downshifting. This operation was performed while she was in 3rd gear.

    Haven't ridden her to test yet, but firing her up and testing movement between 1st, 2nd, and N in the garage the shifting seems tighter, more precise.

    I'll update again once I get her out for a ride.
     
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  8. 429CV23

    429CV23 Member

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    Took her for a short ride tonight. No change in downshifting, although when it does downshift, and upshifts, are tighter/more positive. 5th to 4th is fine, beyond that it takes 3-5 times before it downshifts. Hope it isn't the shifter pawl spring, I've read that is a real PIA to replace.
     
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  9. Mr. Wright

    Mr. Wright Guru
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    Actually there not to bad. If you have any mechanical ability, you can handle it.
     
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  10. 429CV23

    429CV23 Member

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    How do you inspect the spring? Can it be done by removing the trans top cover?
     
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  11. Olde Man

    Olde Man Active Member

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    Lubricate the heim joints on the shift rod even if you think it is ok. Any resistance doesn't allow the return spring to do it's job. How do I know????
     
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  12. HMAN

    HMAN Just like to ride
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    1/2 turn seem like quite a bit? Usually a 1/4 turn or so will put you really really close...?
     
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  13. 429CV23

    429CV23 Member

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    The early BD service manual spec'd 1/2 turn. I've not played with a BD clutch before, so I went with the recommended parameter.
    I figure get it to the factory setting as a baseline, I can play with it later if I don't like the engagement/disengagement point.
     
    #13 429CV23, Jul 9, 2016
    Last edited: Jul 9, 2016
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  14. 429CV23

    429CV23 Member

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    I lubed the Heims and the shifter assy.
    I don't think the spring is broken. In N, there is equal movement of the shift lever in both directions, and the shift lever springs back into position.
    While in 1st gear, if I push the shifter down to downshift, it springs right back up. But, when in 3rd gear, there is only spring tension in the upshift direction.
    The pawl adjuster doesn't seem to have much adjustment to it, but maybe it is still out?
     
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  15. 429CV23

    429CV23 Member

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    OK, I'm a dumbass. I readjusted the shift pawl spring correctly and she shifts perfectly now!
    From the service manual:
    3. Check shifter pawl adjustment.
    (a) Shift transmission into third gear.
    (b) Move shift lever and check for the spring pressure in both directions without shifting out
    of 3rd gear. You should feel the pawl contact the drum in both directions.
    (c) Locate the shifter pawl screw and lock nut on the left side of transmission case, next to
    the shifter lever. Loosen the lock nut and turn the hex-type screw either clockwise or counter
    clockwise, until the spring pressure is the same when moving shifter in each direction.
    Tighten the lock nut when spring pressure and travel is equal and re-check when tight


    Just FYI for future searchers:

    I was mis-adjusting it because there is NO spring tension when adjusted properly. There is no 'detent' or center position feel either. The shift lever just moves back and forth smoothly, contacting the drum in either direction.
    If the pawl is adjusted too far in one direction, spring tension is felt when moving the shift lever in one direction, and the shift lever will spring back to the 'detent' position; the shift lever will then move the opposite direction from the 'detent' position without any spring tension. Hope that makes sense.
     
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  16. Mr. Wright

    Mr. Wright Guru
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    It's the little things that get you. We've all been there.
     
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  17. 429CV23

    429CV23 Member

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    I'm just happy this ended up being a $0 repair! :D
     
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  18. Nukeranger

    Nukeranger Nukeranger
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    :old2::old2::old2:Glad you figured out and solved your problem. Now, try remembering this when you get older!:)
     
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