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Thread: Blown Tranny...

  1. #1
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    Blown Tranny...

    Yesterday early morning I was out on my start of the day ride. Pedaling up (uphill) main street and into the wind I was in 2nd & 4th. I get to a steeper part and the wind picks up so I shift the front down to 1st and all of a sudden the back tire locks up tight. Had to work a little bit to get the derailer untangled from the spokes so I could move the bike.

    I bought the bike (Trek 820) in October of last year for the sole purpose of being an old out of shape diabetic that needed exercise. Am not sure how many miles I put on from the time I bought it till March 18th. From March 18th till now I was just a few miles short of having 500 miles on. Most of these miles have been in the little town I work at up and down the streets, some with really steep long hills, always trying to get anywhere from 10 to 15 miles a day (depending on weather). Before I took up the bike riding I was walking right at 1 1/2 miles a day, which ya it was good, but not helping with weight loss.

    Yesterday after it locked up on me, I walked back to get the pickup (1/2 mile) and then did the old normal walk routine ending with about 2 miles. OMG I hurt so bad last night... Had cramps in lower legs all night long. This morning I do the first walk to Post Office and the shin splints are about to kill me. I had no clue there was that much difference in riding and walking. I know when I started riding I never had any sore muscles. I am now thinking I need to back off a little on the bike riding and do a lot more walking.

  2. #2
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    Blown Tranny

    Seriously-that's your title?

  3. #3
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    Start with less stressful rides and work your way up. Back off but don't give up. Bicycling is a great low impact way to exercise and get fit. Good luck to ya Gramps.

  4. #4
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    Quote Originally Posted by wookie View Post
    Blown Tranny

    Seriously-that's your title?
    haha, man I thought the same thing, just thought I'd keep my big mouth shut!

  5. #5
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    you're working different muscles when you walk or bike. It's understandable you'd be sore after walking a distance when you've been doing nothing but biking for awhile.

    I supplement my biking with some hiking, running, and soccer. They all work different muscle groups and I definitely feel it when I haven't done one in awhile.

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    Quote Originally Posted by wookie View Post
    Blown Tranny

    Seriously-that's your title?
    I guess you don't get it, When you are in a vehicle and change gears, you are shifting your transmission (tranny for short). So ya when the derailer folded into the spokes and locked things up, it was like a blown tranny in a vehicle since you wont move then either....

  7. #7
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    "Trannies" are where you touch back down to earth after launching the "lip".......

    Shin splints suck, give your legs some ice treatment and rest before you go and hammer some more.
    I like bikes.

  8. #8
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    Throw some calf raises or jump ups into the mix, they can help with the shin splints. Good luck.

  9. #9
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    Do you have flat feet? That could lead to some serious shin splints (speaking from experience here.)

    If so, I recommend getting a good pair of shoes like Brooks Beast that have motion control which works to curb over-pronation of your feet.

  10. #10
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    Quote Originally Posted by GrampasShop View Post
    I guess you don't get it, When you are in a vehicle and change gears, you are shifting your transmission (tranny for short). So ya when the derailer folded into the spokes and locked things up, it was like a blown tranny in a vehicle since you wont move then either....
    You're not getting what he said....your title implies you may have performed falatio on a transvestite.

    We all know what you really mean...but your title could use some re-work...you're dealing with the internet here.

  11. #11
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    I can not stress the importance of long stretches enough! before you ride do them for at least ten min if you can, will save you injuries and pain.

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    Anyone want to take a stab at what might have caused the problem??? Like I said running in 2nd and 4th and shifted the front down to 1st and boom it was locked up. At the time I may have been doing around 5 mph. I keep the chain lubed with Pure Silicone which is what we use on door locks for its non dust gathering ability. The chain is not worn.

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    Quote Originally Posted by gearwhine View Post
    You're not getting what he said....your title implies you may have performed falatio on a transvestite.

    We all know what you really mean...but your title could use some re-work...you're dealing with the internet here.

    Oh I had a real good idea what he was referring to and I guess if that is the way he thinks more power to him or her, whichever the case may be....

  14. #14
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    Quote Originally Posted by mythos View Post
    I can not stress the importance of long stretches enough! before you ride do them for at least ten min if you can, will save you injuries and pain.
    There are differing views on that.

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    Quote Originally Posted by GrampasShop View Post
    Oh I had a real good idea what he was referring to and I guess if that is the way he thinks more power to him or her, whichever the case may be....
    I'll admit...it's the way I think. When I saw the subject, I knew I had to click on it. It's definitely more tame than I would've expected.

    As far as the mechanical problem goes. Did you shift while under power? You said you were going uphill, then a wind gust came...then you shifted. If you were powering through that, while shifting, that's a sure way for stuff to break.

    If you let up on your pedal strokes to make the shift, but it still broke, something was just not adjusted properly. I'm assuming 1st gear means your largest rear cog...so a possibility is the low limit set screw. The derailleur could've over shifted right into your spokes. I can't conclude any more than that without seeing it though.

  16. #16
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    Quote Originally Posted by GrampasShop View Post
    Anyone want to take a stab at what might have caused the problem??? Like I said running in 2nd and 4th and shifted the front down to 1st and boom it was locked up. At the time I may have been doing around 5 mph. I keep the chain lubed with Pure Silicone which is what we use on door locks for its non dust gathering ability. The chain is not worn.
    You say you lube, but how long since you'd made any adjustments to the drivetrain? ghost shifting (from something being out of adjustment) can cause that sort of thing. sounds possibly like a mis-adjusted limit screw that let the chain jump.

    I have had my rear derailleur get tangled in my spokes once. a root in a hole (filled with water) on a poorly-maintained section of trail pushed my derailleur into my spokes. cranked it around and f'd my drivetrain. I had to bend things back into place with some pliers and even then had to singlespeed it back to the TH.

    sometimes a mechanical is just bad luck like that. but unless you are always up on your maintenance, it can be difficult to determine whether it was a lack of maintenance or bad luck that caused the problem.

  17. #17
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    Quote Originally Posted by GrampasShop View Post
    Anyone want to take a stab at what might have caused the problem??? Like I said running in 2nd and 4th and shifted the front down to 1st and boom it was locked up. At the time I may have been doing around 5 mph. I keep the chain lubed with Pure Silicone which is what we use on door locks for its non dust gathering ability. The chain is not worn.

    Where did it lock up? You said you dumped your derailleur into your spokes - was that because you dumped the chain off the front chainring? Was the chain wedged in-between your frame and your front gears, or was it stuck in the back?

    Could be caused by shifting under load, or out-of-tune derailleurs. I suggest looking up "how to adjust derailleurs" online to find a bunch of good videos and information.

    Also, you should really never shift in the front gears while pedaling hard. It needs to be nice and easy, and as smooth as possible.

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    I am afraid I was still under power at the time more than likely. I have downshifted like this many times while going up the hill. Guess it just caught up to me this time. I very seldom change gears on the back, usually leave it in 4th and do all my shifting on the front.

  19. #19
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    Quote Originally Posted by whodaphuck View Post
    There are differing views on that.

    Good link...people stretch too much. Stretching for flexibility is one thing, but warming up the muscles for exercise is completely different.

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    Quote Originally Posted by jtmartino View Post
    Where did it lock up? You said you dumped your derailleur into your spokes - was that because you dumped the chain off the front chainring? Was the chain wedged in-between your frame and your front gears, or was it stuck in the back?

    Could be caused by shifting under load, or out-of-tune derailleurs. I suggest looking up "how to adjust derailleurs" online to find a bunch of good videos and information.

    Also, you should really never shift in the front gears while pedaling hard. It needs to be nice and easy, and as smooth as possible.
    Ok the front made the transition from the middle sprocket to the left hand sprocket. The back end is where all the locking up happened. The derailer was into the spokes, the chain or a little of it was wedged between the inside sprocket and the plastic ring on the spokes.

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    Quote Originally Posted by GrampasShop View Post
    Ok the front made the transition from the middle sprocket to the left hand sprocket. The back end is where all the locking up happened. The derailer was into the spokes, the chain or a little of it was wedged between the inside sprocket and the plastic ring on the spokes.
    http://www.parktool.com/blog/repair-...nts-derailleur

    Take a look at the "L-limit Screw" section in particular. If you can't get it working from these directions, definitely bring it in somewhere. They should be happy to explain what needs to be done to fix the problem.

    Typically with this screw set incorrectly...you either can't get into the lowest gear, or it goes beyond the lowest gear. When it goes beyond the lowest gear, the chain will go right where you're describing it. It can then pull the derailleur into the spokes with it. That's the exact reason they put that plastic plate in there....to protects the spokes if this happens.
    Last edited by gearwhine; 06-28-2011 at 11:39 AM. Reason: added info

  22. #22
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    Good info gearwhine. Sounds like that's the problem.

  23. #23
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    In other news . . .

    You're looking for advice about fitness, Type 2 Diabetes, and exercise --

    Have a look at my blog in the signature here. You should head back to the start -- October 26, when I couldn't walk 20 minutes.

    Lots and lots of discussion about diet, exercise, getting fit, losing weight, and managing Type 2 Diabetes. You're the reason I kept these notes in a blog.

    These days I'm getting tired. Rain here is not cooperating, and I'm getting maybe a bit bored of the routine. I need to address that. But we're down about 50 lbs, and the blood work is back to "normal" -- A1C, glucose -- all a-symptomatic.

    You're on the right track. Your Trek should be covered by warranty. In any case, your derailleurs need adjustment.
    Si vis pacem, para bellum.

  24. #24
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    Quote Originally Posted by GrampasShop View Post
    I am afraid I was still under power at the time more than likely. I have downshifted like this many times while going up the hill. Guess it just caught up to me this time. I very seldom change gears on the back, usually leave it in 4th and do all my shifting on the front.
    that's backwards of how you're supposed to do it, FYI.

    shifts on the cassette in the rear are faster and crisper, and shifting is more effective when done primarily on the back. I RARELY shift my chainrings, but when I do, it's generally in these situations:

    middle ring - vast majority of the time, probably 90% or more
    granny ring - long, steep climbs. I can make most climbs in my middle ring, so granny is reserved for the toughest ones.
    big ring - pretty much only used on roads. I'd get rid of it altogether if I never rode on the pavement, but since I ride to the trails from my house, I actually use this gear in those situations.

    that L-limit screw is very important. when kept up on to prevent dumping the chain into the spokes, you can get rid of the spoke protector disc. but I've seen what happens to spokes when this isn't kept up on and the spoke protector has been removed - you hafta replace all the driveside spokes.

  25. #25
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    i thought he was talking about the Ibis Tranny
    Click Here for Forum Rules

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    on the fitness portion of the thread... and your username being Grandpa.... im assuming youve got some age to you.. but i was quite the opposite when i started biking.. i can walk/hike for miles and miles up and down mountains with no pain or getting tired/being sore.... aslong as i stay at a reasonable pace.... however when i started biking my first 2-3 days i was huffin and puffing after a mile or 2 (there is no flatground where i live).. but now im going miles and miles on bike

    and like someone else said you are working different muscles depending if your walking or biking, so i would highly suggest mixing your biking with some walking or hiking if you enjoy the outdoors a few times a week if your in this hobby for Fitness and trying to keep your body in its peak shape..

    i cant really offer much mechanical advice as im new to bikes but ive had a coupe close calls like you mentioned climbing very steep hills under power and making the mistake of starting in the wrong gear and upon shifting i came to a complete stop.. luckily to Real damage was able to get everything spinning freely after some roadside tinkering

  27. #27
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    I was expecting a Savage Love thread
    Since when did Need have anything to do with this?

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    Ok, I had the wife take the bike in to LBS today and it is already fixed. I will be studying the links that were provided as far as adjusting things.

    Most of the time I can climb this hill in 2nd on the front and 4th on the back, but yesterday there was a pretty good head wind and I just couldn't make it up.

    As far as the exercise part. I been Type I diabetic for 46+ years, am 50 years old now. Other than being a little overweight (was 230# when I started riding) I have no problems with the long term diabetes... I had walked for close to 4 years about 1 1/2 miles a day, every day so when I took up the bike riding I started out at about 1 1/2 mile a day, just so I wouldn't have sore muscles.. I am now up to between 10-15 miles a day depending on the temperatures. Am at about 25 pounds lost since I started riding. Insulin intake has been cut back a bunch (last A1C was 5.8 in March) and I just plain feel a lot better now. It just kinda got me when the ole legs started cramping last night... That is something I have always had and I just learn to deal with them.

    I am hoping to be in good enough shape in August when we go to CO for vacation I can try some of the trails in the Gunnison area. I really don't think that will be to much of a problem the way things are going right now.

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    Quote Originally Posted by CHUM View Post


    i thought he was talking about the Ibis Tranny
    I thought it was going to be about these guys,
    Attached Images Attached Images  

  30. #30
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    Quote Originally Posted by gearwhine View Post
    You're not getting what he said....your title implies you may have performed falatio on a transvestite.

    We all know what you really mean...but your title could use some re-work...you're dealing with the internet here.
    I haven't had a sig in a long long time. Thanks man

    OP, if you're chain is falling into the spokes adjust the limit screw so that can't happen.

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    Quote Originally Posted by eatdrinkride View Post
    I haven't had a sig in a long long time. Thanks man
    Ummm... you might want to fix the spelling of "fellatio"...

  32. #32
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    Quote Originally Posted by SkaredShtles View Post
    Ummm... you might want to fix the spelling of "fellatio"...
    Hmmm.....is it still a quote if I fix it?

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    Quote Originally Posted by roadie scum View Post
    I thought it was going to be about these guys,
    Aren't they the same guy?

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    Quote Originally Posted by gearwhine View Post
    http://www.parktool.com/blog/repair-...nts-derailleur

    Take a look at the "L-limit Screw" section in particular. If you can't get it working from these directions, definitely bring it in somewhere. They should be happy to explain what needs to be done to fix the problem.

    Typically with this screw set incorrectly...you either can't get into the lowest gear, or it goes beyond the lowest gear. When it goes beyond the lowest gear, the chain will go right where you're describing it. It can then pull the derailleur into the spokes with it. That's the exact reason they put that plastic plate in there....to protects the spokes if this happens.
    Ok, read up on this link.. only problem is, I did NOT shift the derailer.... I went from 2nd to 1st on the pedal gears..... The back was in 4th and I had not shifted it, so no reason for the derailer to move toward the spokes.

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    Quote Originally Posted by SkaredShtles View Post
    Ummm... you might want to fix the spelling of "fellatio"...
    I was at work when I posted...I wasn't about to go searching for the proper spelling.

  36. #36
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    Quote Originally Posted by GrampasShop View Post
    Ok, read up on this link.. only problem is, I did NOT shift the derailer.... I went from 2nd to 1st on the pedal gears..... The back was in 4th and I had not shifted it, so no reason for the derailer to move toward the spokes.
    Hmm...I guess I read wrong earlier, as well as many others.

    Now that makes little sense....all I can say is there was something wrong....yep...that's it. If the LBS can say what they did, it would help. Glad it's fixed though!

  37. #37
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    Maybe the wind blew the slack derailleur cage into the spokes...
    I ride with the best dogs.




  38. #38
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    Gnomes, I always blame it on gnomes. Anything that can't be explained is the fault of gnomes.

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    and the internet is full of transvestites performing fellatio ... I laughed out loud.

    Quote Originally Posted by gearwhine View Post
    You're not getting what he said....your title implies you may have performed falatio on a transvestite.

    We all know what you really mean...but your title could use some re-work...you're dealing with the internet here.

  40. #40
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    I'd say the take up pulleys on his rear derailleur are/were gummed up. Though shifting middle to granny isnt all that many links to take up, if the pulleys locked, it could push the derailleur into the spokes.

    Just my .02.

    Marc
    Yesterday starts tomorrow, tomorrow starts today, and the problem seems to be we're picking up the pieces on the ricochet

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