Hilux problem rear axle

[Hornet 6]

Back to the garage tomorrow, repair lasted 2 months.
I have been doing short trips around the lanes of Devon since the last repair, no leak evident.
Last week i did almost 500 miles of motorway driving over 2 days, 70mph most of the time, checked today, leaking again.
God knows what will have to do to rectify this.
Cheers
Richard

Fine around the lanes, i.e. short runs, fails on the first long run, that points toward a breather problem.

Neil.