[Nanook]

I do condition monitoring on industrial gearboxes for a living for the coal industry. It only takes a small hairline fracture in manufacturing to cut down a gears life dramatically.

One reason I'll never buy another Toyota was because I had a similar thing happen to me in my Hilux. I was in peak hour Sydney traffic when my rear diff let go which was the final straw for that POS vehicle.

I bought a 2nd hand diff swapped it out and traded it in. After all the troubles I had with it, I felt sorry for any poor bloke that bought it.