Locking Tag Axle Tire

[Rex]

First post reading for years. Have had a tag axle, drivers side,
that locks on hard braking. Many corrective actions taken. Started
by replacing leaking oil seal and brakes that wheel. Adjusted slack
adjusters myself and also local truck shop. At Bennie???
recommendation at Bluebird hooked up guages to each line going to
each tag axle wheel. Thought had found problem approximately 10#
difference, BUT switched gauges and found that the guages had a 10#
difference. Guages actually show air pressures to each side very
close. Truck mechanic thinks it could be warped brake drum, but
it has not been noticed when other repairs made. Before taking off
wheel and drum again, I though that I would seek help from past
experiences on forum.

Rex Puckett
85PT36