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XT Derailleur Problem(9 posts)

XT Derailleur ProblemDrupa
Jun 28, 2003 4:50 PM
Purchased a new looking XT rear from Performance clearance bin. Put it on my bike and set up the high and low adjust no problem. When I started to do the barrel adjust from 1st to 2nd, and 2nd to 3rd I was unable to get the chain quiet on 2nd. The bike shifts crisply on every other gear - no jumps, no hesitation. The chain cannot sit on the second cog without making a racket.

The guys at Performance did a quick look and suggested a bad cog (although it was nearly new). I bought another LX cassette and have the same problem.

Any ideas? Bad rear? Something else?

Quiet on 1st & 3rd but noisy on 2nd? All rings? (nm)TFerguson
Jun 28, 2003 5:05 PM
Quiet on 1st & 3rd but noisy on 2nd? All rings? (nm)Drupa
Jun 28, 2003 5:29 PM
Yes 1st fine, 3rd fine, 2nd chatters hard. ALL RINGS.

New chain, new cassette, new (LX) shifters.
Nobody can help?Drupa
Jun 29, 2003 4:19 PM
That's why I am here - it isn't an obvious problem...
I put mine in the stand and started shifting...TFerguson
Jun 29, 2003 5:30 PM
and staring at it to see how I could duplicate the problem. Baffled.

Current XT derailleur? Model number? If it were an 8 speed, then I think I could duplicate it.

What happens if you tune it (turn the barrel in) until it just stops making noise on the second cog?

Still trying,
My experienceChen2
Jun 30, 2003 6:08 AM
When I had a similar problem it was because the lock ring was not tight enough.
Some things to check.Spoke Wrench
Jun 30, 2003 9:32 AM
Whenever I encounter a rpoblem that seems to defy logic, I try to put everything back into the default mode and start over from there.

1. Like Chen said: Is the lockring on tight? Does the cassette seem even a tiny bit loose on the freehub body?
2. Dropout alignment. Does the derailleur arm seem to hang perfectly vertical in every gear. Why did you buy the new derailleur? Was the old one working perfectly? A shop will probably charge you around $15.00 to put a gauge on your derailleur hanger.
3. High gear limit screw adjustment. Disconnect your cable (important) and turn the cranks to move the derailleur down to your smallest cog. Make sure that the derailleur pulley is exactly below your smallest cog. All of the indexing works off of this starting point so it has to be exactly right.
re: XT Derailleur ProblemDrupa
Jun 30, 2003 5:16 PM
Thanks, I will look into these suggestions.

Reason I bought new rear was to replace an old Acera (Alivio? can't remember) - traded some road wheels for this bike - made it into a project beater. Bike was fine with the Acera but had high miles - just wanted to upgrade the components...
That's cool, I'd have done it too.Spoke Wrench
Jul 1, 2003 8:16 AM
The reason I asked was because often guys will buy a new derailleur thinking that's necessary to solve a problem when, in reality, the problem lies somewhere else. That's kind of information I find useful when trying to diagonse a problem, especially on a bike that I can't see.