[pedal955]

I have a '06 Yeti 575

I 'had' older XT hydros on it but recently changed to XT M775 calipers with XTR M970 levers and XTR 180mm rotors. I have about 10 rides on this setup and its been doing it from day one. When I'm pedaling everything is fine but when I stop pedaling and coast/freewheel I get a vibrating squeal only in the rear, front is fine. I touch the lever and add a little pressure it stops but when I release the lever it starts again. I can start pedaling and it it stops too. I stopped on the trail today and spread the pad spring really wide and re-inserted the pads, this worked for a little while then it started again lightly. The brakes and rotor are centered...................

ANY IDEAS????????????

 

[dogonfr]

Try adjusting the caliper with feeler gauges to compensate on a slower piston. :thumbsup:

 

[jeffscott]

Eyeball the caliper straight and true to the rotor....

Fix any sticky pistons....

Check pads (light sanding???? probably).

Check rotors (light sanding???? probably).

Go do 10 hard stops...and then ride.