Be careful how you install them. Look at the link:

http://mb.braingears.com/126_DISC1/program/Chassis/33-615.pdf

and notice how the plastic hammer is used to install them. I used a 22mm open ended wrench on it's side and beat on that with a plastic hammer. Don't use a shop press to install them or in a year, you'll do it again. AMHIK.

If it's still popping, you need to check all things mechanical that move. Sound travels well through the steel chassis.

You might look at the u-joints, flex discs and center bearing, all drive shaft related.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.