Canadian Poncho

65 Thru frame Idler arm?

How do you stop the shaft from turning when undoing the top nut?

Picture? If its the ball stud, i would use a pickle fork To put some leverage on it.

my $0.02

Hmm, pickle fork for tension between the frame and arm. I'll try that tomorrow. Thanks Pete!

I used a bottle jack on the bottom of the arm to push into the frame. Worked like a charm.

Did the pickle fork work? I've had success with pressure applied and an impact to whiz the nut off, unless the offender is badly seized.
.