6-speed trannys

Discussion in 'Transmission' started by wilks3, Dec 19, 2009.

  1. wilks3

    wilks3 Junior Member

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    Are the 6-speed trannys "synchromesh" style?
    If so, how would a synchromesh type oil work?
    GM and Pennzoil both make excellent oils for this type of trans.
     
  2. wilks3

    wilks3 Junior Member

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    Thanks! Been off bikes for a while and was jus wonderen...
     
  3. Bud White

    Bud White Well-Known Member Retired Moderators

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    1st and 5th are spur
    2-3-4th and 6th are helical

    use either spectro 6speed in it

    or lucas 85-140 which is what i have been trying it shifts better than with spectro and nto as noisy first shift of day is stiff cold as its a non syth but after that like butter
     
  4. Dan89FLSTC

    Dan89FLSTC Banned

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    Syncromesh has nothing to do with wether the gears are helical or straight cut.

    A syncronizer ring is used on some transmissions as a means of bringing the shaft and the gear speed in sync before the gear is engaged to the shaft.

    The transmission in a Harley is a constant mesh. No Syncronizers.
     
  5. Bud White

    Bud White Well-Known Member Retired Moderators

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    and thier brass usually and with abuse that dont hold up .. rebuilt many a syncro trans at dodge :) .. wonder how one would hold up in a bike
     
  6. Jack Klarich

    Jack Klarich Expert Member

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    Would make for easier shifting and less clunk but more internal rotating mass and more parts on a rebuild
     
  7. Jack Klarich

    Jack Klarich Expert Member

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    Not complaining here Smitty im kind of fond of the way 4 5 and six speeds shift and the sound they make its unique to our beloved machines, and stand behind your post on proper lube and clutch adjustments JMO
     
  8. Breeze3at

    Breeze3at Well-Known Member

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    Nothing HARD about it, it just sounds like a WWII tank. HD gears are not that much larger than others and the engagement dogs aren't larger. Many other brands transmissions go into gear with a "snick", all gears, all the time. They are also constant mesh, and just as reliable as HD. I see it as an engineering shortcoming that HD has turned to it's advantage (?) by saying "that's a Harley sound", and we parrot it.:bigsmiley33:
     
    Last edited by a moderator: Dec 20, 2009
  9. cowboywildbill

    cowboywildbill Active Member

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    Does anyone back cut the gears in thier tranny's anymore? I had this done to my 93 Springer and it made a world of difference , especially in downshifting.