2005 cummins 4 wheel drive , 80K miles garage kept , original pads with very little wear .

got home yesterday and both front brakes were HOT ,, I jacked front up and I could turn them but they were tight , rear not affected .

so is the hydo-boost bad?

or master cylinder bad?

or anti lock valve bad?

never had not one problem with this truck ...

at a loss

 

Pump up the brakes so they are good and tight, try and turn a wheel. If it is really stiff, crack open the bleeder valve. If it is not easy, replace the soft lines.

 

it's both sides , really don't think it's the hoses both at one time ,, odds would be very high

 

it set overnight and they are not hanging ,, fixing to go drive it and see what happens

 

It's a process of elimination. While odds are against both lines failing at the same time, it isn't unheard of. Need to check it, to eliminate it as a possibility.

 

been driving it this morning cannot get it to do it again ,, got on brakes hard 3-4 times ,

 

Of course not. Now you are actually looking for the problem, so it is 'hiding'.