Velvet drive rebuild problems

Discussion in 'Inboards' started by ghollow, Jun 18, 2011.

  1. ghollow
    Joined: Jun 2011
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    Location: DFW

    ghollow Junior Member

    I have a 1998 Tige inboard with a velvet drive 10-17 trans. I rebuilt it using a kit I got from Skidim with new seals clutches, etc. When I first put it in the water to test, I had forward and reverse. I took it for a spin and it was slipping bad in forward when I gave it throttle. Reverse quit working altogther. I am not sure what I have done wrong or where to start checking for possible problems. Any advice would be greatly appreciated.
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Did you set the clutches to the specifications in the manual? What is the pump pressure?
     
  3. ghollow
    Joined: Jun 2011
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    ghollow Junior Member

    I am not sure what you mean by setting the clutches. They would only go in one way. I have not checked the pressures yet. I will do that in the morning and let you know what I find out.

    Where do you check the pressure? I assume it would be at the two plugs on top of the trans?

    Thanks for the reply.
     
  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    They are both connected together. It doesn't matter which one you use. There will only be pressure in forward. The clutches have to be set with shims to the proper thickness.
     
  5. ghollow
    Joined: Jun 2011
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    ghollow Junior Member

    Sounds like I may have screwed up the setting of the clutches. I used all of the ones that came with the kit. I thought that there where the same number in the kit that were in the transmission to start with. Sounds like I may need to pull it and tear it back down.

    I will check the pressure first before I pull it back out.
     
  6. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    It sounds like the pressure is low if it is slipping in fwd and reverse.
     
  7. ghollow
    Joined: Jun 2011
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    ghollow Junior Member

    Reverse seemed pretty strong when I backed it off the trailer. After about a twenty minute test ride, the trans was slipping bad in forward and would not go over about 10 mph. I took it back to the trailer and did not have any reverse at all.
     
  8. whitepointer23

    whitepointer23 Previous Member

    i take you have checked the oil level, you may be losing oil through the cooler or it may need a top up after its first run.
     
  9. ghollow
    Joined: Jun 2011
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    Location: DFW

    ghollow Junior Member

    I just checked the pump pressure at the 3/8" plug near the shift lever. I get about 135 psi in all three gear selector positions. It will only turn in the forward position though.

    I also failed to mention this earlier but when we ere on our test run, the tranny seemed to get hot very quickly.
     
  10. whitepointer23

    whitepointer23 Previous Member

    is the front pump cover aligned for the suitable rotation, i don't know what happens if it is not but gonzo might know.
     
  11. ghollow
    Joined: Jun 2011
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    Location: DFW

    ghollow Junior Member

    I think I have the pump in correctly or I do not think I would be getting any pressure at all.
     
  12. Chuck Losness
    Joined: Apr 2008
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    Location: Central CA

    Chuck Losness Senior Member

    Attached are the installation manual and the service manual. I rebuilt my velvet drive with parts from Ebasic power. Good luck
    Chuck
     

    Attached Files:

  13. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

  14. sdowney717
    Joined: Nov 2010
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    Location: Newport News VA

    sdowney717 Senior Member

    selector valve misalignment will cause low clutch apply pressure.
    It is overheating likely because it is slipping.

    This is a very basic trans. I rebuilt one of mine.
    the oil pressure sounds sufficient to properly engage the clutch packs, so must be either the oil flow to clutches or the clutch piston seals. I wonder if you put this together properly, have you worked with auto transmissions before this?
     
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  15. ghollow
    Joined: Jun 2011
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    Location: DFW

    ghollow Junior Member

    This is the first time I have ever tried to rebuild a transmission. I will pull the selector valve and check it first
     
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