I have no real experience with this exact problem but If it were my truck I would grab a pint of Brake Fluid and flush the line going to that wheel. It sounds like you might have something plugging the line. Restricting the fluid from returning.

It is a long shot but for the price of a pint and some time it might fix it. Good luck



Brian Moore
1949 3100 5 window Deluxe
"Today is better than yesterday, but not as good as tomorrow"