Replacing Gear Shifter

Discussion in 'Parts 'n Stuff' started by daazzaa, Jun 30, 2017.

  1. daazzaa

    daazzaa Likes Bikes

    Hi all,

    The young fella come a cropper on his MTB, and looks like the rear gear shifter on the right may have got a little nudge. It would only ocassionally shift down into lower gear (higher rear cog), but shifting up gears was fine. Got to the stage where you could push the whole gear lever all the way to the front of the bike without engaging another gear, ie loose. I took the bottom off and gave it a clean and improved for a few minutes the gears would change up and down fine. I have freed the pawl up etc. I have compared to the other gear shifter and I think the problem is the nut at the bottom holding the gear levers in etc is not as tightened as the other, thus the gear lever can move around a little. I have tightened it the best I can but there is not much to grab on the nut.

    I was hoping to come from the top and see also if anything was loose etc. Anyone know how to actually get the top cover off which has the gear numbering on it? It is made hard by the bracket as I cannot get the bracket off as it is one of those tight one that jut clamps with a bolt.

    Would it be just easier to buy a new altus shifter and install that? How do you get the old one off with those tight brackets? Do you have to remove the grips and slide it off? The gear shifter is a Shimano Altus SL-M370.

    Thanks
     
  2. wkkie

    wkkie Likes Bikes and Dirt

    Sounds like a good chance to upgrade from the Altus.

    They are pretty low end and the time you've spent on it already probably far outweighs the cost of the actual shifter!

    Even something second hand (deore / slx) would be a good option.
     
  3. pink poodle

    pink poodle Clinically Inane

    Shimano zee time.

    Remove grip and slide the shifter off. Sounds like the thread may have stripped and it won't hold on again.
     
  4. moorey

    moorey Isn't flammable.

    Good advice...except Altus is 9sp and zee is 10...
     
  5. Ezkaton

    Ezkaton Eats Squid

    Would the shift range be limited by the derailleur's high or low screw to stop the shifter from being able to shift that one extra click?

    Or are they just flat-out incompatible?
     
    Last edited: Jun 30, 2017
  6. moorey

    moorey Isn't flammable.

    I'm not 100% sure they aren't, but there will be piles of old 9sp Shimano shifters out there, so I'd just stick with that. Pretty sure I've given away all mine, but can check tonight.
     
  7. daazzaa

    daazzaa Likes Bikes

    Yep, agreed, already spend a couple hours on it. If I upgraded the shifter, do I have to upgrade the shifter for the front derailleur also? The rear derailleur is deore.

    Cheers
     
  8. daazzaa

    daazzaa Likes Bikes

    Yeh I think the shifter is "no recessed" into the other shifter if that makes any sense? They are not flat against each other and a little loose (can wobble it a little side to side and up and down), but if I slide the shifter whilst holding it up, it shifts OK. I works OK when I turn it upside and look at the pawl and internals I guess because the shifter is not hanging down.
     
  9. daazzaa

    daazzaa Likes Bikes

    Thanks mate. I see you are from Buninyong, must be cold there today!
     
  10. wkkie

    wkkie Likes Bikes and Dirt

    If the front shifter is still working then you can leave it. Some here though might say that removing the front shifter would be the upgrade!

    But just changing the rear shifter is all you need.
     
    Last edited: Jun 30, 2017
  11. daazzaa

    daazzaa Likes Bikes

    Thanks wkkie, might be a good time to upgrade to a better spec shifter ?
     
  12. moorey

    moorey Isn't flammable.

    Little cool, yeah.

    Just occurred to me, unless you're also changing cassette, you HAVE to stay 9sp shifter. I think the pull ratios on the derailleur are different between 9 and 10, but the issue is even if you only used 9 clicks on a 10sp shifter, the ratios will be right out anyway. Each shift will 0.9 of the distance the derailleur needs to move if using 9 of the 10 shifts.
    Get a 9sp shifter, or find a s/h 10sp shifter/cassette/derailleur set up. Chain ideally also. Ditch the front while you're there.
     
  13. moorey

    moorey Isn't flammable.

    Altus shifter just popped up on Facebook. Price not listed, but selling stuff really cheap.
     
  14. daazzaa

    daazzaa Likes Bikes

    Thanks. Yep will stick with a 9speed shifter, Altus or better. I'm a noobie at this stuff, so trying to make it as easy as possible, don't want to change too much!
     
  15. moorey

    moorey Isn't flammable.

  16. daazzaa

    daazzaa Likes Bikes

    On FB? What FB group mate?

    EDIT...... Thanks mate you beat my a few secs
     
    Last edited: Jun 30, 2017
  17. moorey

    moorey Isn't flammable.

    Link is above
     
  18. pink poodle

    pink poodle Clinically Inane

    Oh I meant a full upgrade...it works well and isn't too expensive. Not as cheap as scoring a 9speed replacement on the used market though.
     
  19. daazzaa

    daazzaa Likes Bikes

  20. Nambra

    Nambra Likes Dirt

    Manuals for all things Shimano if you want to continue to diagnose things:

    http://si.shimano.com

    Just enter SL-M370 into search box.
     

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