Transmission slipping in 4th and 5th gear

Discussion in 'Transmission' started by Renegade946, May 27, 2012.

  1. Renegade946

    Renegade946 Member

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    I have a 1995 Dyna Wide Glide with 35,000 miles on it. I just changed the transmission fluid to Amsoil and now it is slipping. I rode it today for the first time since changing the fluid and it is slipping in 4th and 5th gear. It has never slipped before. Could I have under or overfilled the transmission and caused this. I also changed the primary chaincase fluid at the same time. I am able to do most repairs myself, so I could use some help as to what might be causing this problem. Thank you for your help.
     
  2. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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  3. blademan

    blademan Active Member

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    Transmissions do not "slip". You may have overfilled primary and clutches could be slipping.
     
  4. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    The clutch will be slipping perhaps you have used an oil in the primary that has friction modifiers or is too thin to do the correct job
    so a wee bit more info on oil in the primary may help

    Brian
     
  5. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Not clear to me what you have used in your engine, primary and tranny. Here are some generic recommendations:

    Generic fluid recommendations

    Engine: FULL synthetic 20W50 VTwin engine oil
    Tranny: FULL snythetic 75W140 GL-5 gear lube
    Primary: Fit-for-purpose chaincase/wet clutch lubricant (like HD Formula + or Spectro Primary, Redline Primary, etc.)

    Measure how much comes out of the engine and tranny (separately of course!), and put that much back in as a starting point. Adjust when fluids are at operating temperature. Primary use the volume specified in your Operating Manual.

    TQ
     
  6. Renegade946

    Renegade946 Member

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    Thanks for your help. I used 20w50 Amsoil motorcycle oil for the oil change. I used Amsoil chaincase and gear oil in the primary. I think the problem is in the lubricant that I used in the primary. It is recommended for jet skis and ATVs. Can I use 20w50 in the primary?

    No, I have not adjusted the clutch. After reviewing the other answers to my post, I think I used the wrong chaincase lubricant. I used Amsoil chaincase and gear lubricant with friction modifiers and I think that is why it is slipping.
     
    Last edited by a moderator: May 28, 2012
  7. RibEye

    RibEye Junior Member Contributor

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    I would put some good ol' HD Formula+ in the primary, and watch your issue clear right up. You really don't need anything more than a simple dino oil in the primary.

    Enjoy,
    Rich P
     
  8. Renegade946

    Renegade946 Member

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    Yes, I used a lubricant with friction modifiers. I need to change lubricant. What do you suggest that I use in the primary?
     
  9. Renegade946

    Renegade946 Member

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    Thanks for your help. I will try that.
     
  10. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    If the clutch hasn't been adjusted in 35k or even 15k. It wouldnt hurt. Only takes a few minutes. HD formula + in the primary works great.