Rear derailleur question

Ffluff
Ffluff Posts: 282
edited October 2009 in MTB workshop & tech
couldn't find an answer to this on the forum or in the workshop guide so hopefully I might get some thoughts from you guys?

running XT front and back and when on the granny and on the biggest rear ring i'm getting a jump - it only really happens under pressure when climbing long and slow

chain and cassette in good nick

any thoughts as to how i can fix it?

cheers all

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