I had one that came with a frozen 2.6 Mitsubishi 4 cylinder. A little research and lo and behold Ford used the same trans behind the Ranger with the 2.9 Cologne engine! Some junkyard searching netted the bellhousing and engine.
Keep that in mind if your 2.6 dies. TheRangerStation and MazdaTrucking.com were good sources of info for the swap. MazdaTrucking.com has a thread for LSD swaps for the front and rear differentials.