I was driving back from a bit of 4wding today (very casual 4wding) and on the way home my truck started to vibrate quite badly I thought it was the engine playing up but have put it down to the gearbox.
Its fine from 1st -3rd (slight vibration at the very top of 3rd) but 4th and 5th gear vibrates really badly under load but its fine cruising and decelerating.
My gearbox has been a bit hard to get into 1st and reverse lately and my guess is one of the bearings has/or is about to collapse.
Anyone had this problem before? It still drives fine it just vibrates under load

Cheers
Caleb