Trem trouble

[Robert Connor]

’94 cu24, completely stock. Strings are d’addario 10.5 - 48 and the nut is graphtech.
The trem unit is not returning to pitch after moderate use, the G and D strings return sharp. I‘ve never experienced this in 20 years of playing it and there are no other tuning issues.
Remedies I’ve tried:
Nut lube - graphite and other gunk.
Set up: strings off and factory reset set up.

I would suspect the fact I’ve increased string gauge, but only from 10’s to 10.5’s.
I wouldn’t have thought .005” on strings 1,2 and 3 would cause any issues.

It’s bloody annoying. Any ideas beyond “take it to a qualified tech”? I’ve looked after my own set ups for 25 years.

 

[WEDGE]

I would start from scratch and adjust the bridge as if it was a new install.

 

[AP515]

Go back to 10's once just to see if the problem stops. If so the nut needs filed for the new string gages.

 

[mad monk]

Go back to 10's once just to see if the problem stops. If so the nut needs filed for the new string gages.

This.

 

[Rider1260]

PRS runs the nut slots on the tight side so going up a bit will mean the slots might need a bit of love if you don't have nut files you can just use a feeler gauge with some really fine sandpaper around it one or two passes on each sting should be plenty

 

[Lacire]

This.

Agree, go back and try the 10s.