However, the pistons are directional in ATE calipers -- they are set so that the pads won't squeal going forward, so they may going backward with no easy cure.
OEM pads squeal the least, but nothing is perfect.
the Volvo 740s were plagued with front brakes (usually the Griling) and screamed to beat the band. So bad a friend of mine said the border crossing guards in Europe used to stick their fingers in their ears when they drove up --- never did fix it completely.
One thing that helps is to get the caliper slots completely clean when putting in new pads. This allows them to sit square -- dirt under one side can let the get crooked, and boy oh boy, will they screech!
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!