New shifters for deore xt x7 delrailer

Assuming that the normal set has been done properly, consider replacing the derailer. Could be bent or broken parts.

on some of the old stuff there was a small plastic plug screw, Phillips head, near where the shift levers enter the pod. Once that is removed and the shifter is in smallest cog position you will be able to sight through that access hole and see daylight and can fish the cable through it. Hope that helps.

Yes,but only if you change the rear sprocket to a seven also.

Maybe start here and if you can't figure it out, take it to a Bike Shop. Ther's only so much useful mechanical advice one can remotely lend with no details.

Sounds like the shifter is toast. One of these may help you figure it out:

http://techdocs.shimano.com/media/techdocs/content/cycle/SI/Deore-XT/FrontDriveSystem/SI_6K9FG_En_v1_m56577569830604945.pdf

http://techdocs.shimano.com/techdocs/blevel.jsp?ASSORTMENT%3C%3East_id=1408474395181679&FOLDER%3C%3Efolder_id=2534374302051937&bmUID=1210371429135

http://www.parktool.com/repair/readhowto.asp?id=75

check the shifter handles also check your cables and cable covers check anchor bolts frame clips anything that can cause your cables to come out of adjustment shimano is quality stuff so start at the shifters and work back to the derailleur .hope this helps

ok this is a little hard to explain in words but the important thing is to make sure the chain is on the biggest cog, pull the cable through the deralier tight and fasten. don't pull it too tight however. you may need to fine tune using the h/l screws but if it was in tune before then it shouldn't need too much adjustment.

Try unhooking the chain from the ring and pulling the derailleur out far eough to get at the bolt. Make sure your limit screws are adjusted for the travel yuou want and take up the slack. You can use the cable adjuster on the shifter to tighten it or loosen it as necessary. Make sure the adjuster has enough to go in the direction you need. I don't know which model Diore you are talking about so this is the best advice I can give you.

It depends.. Shifter cables are standard and the same one would work for both LX and XT shifters. If the old cable is full of grime etc, it is a good idea to run new cables - it will give you a smooth easy shift.

I am sure if you check www.shimano.com you will find the manual for your model of shifter. Replacing cables is pretty easy.