If you were driving along a lost all the gears at once what could be problem There have been no problems out of clutch is it in Tansfercase or transmission?

If you suddenly lose all gears at once while driving, and the clutch isn't the issue, the problem almost certainly lies within the transmission itself, not the transfer case. The transfer case handles power distribution between the axles (e.g., 4WD systems), but it doesn't directly control gear selection. Losing all gears simultaneously points to a catastrophic failure *inside* the transmission. This could include:

* Complete failure of the internal transmission components: This could be due to broken gears, a shattered output shaft, a severely damaged synchronizer system, or a catastrophic bearing failure.

* Broken or severely damaged shift linkage/cables: While less likely to result in the complete loss of *all* gears at once (some might still engage erratically), a major problem with the shift linkage could prevent any gear from engaging properly.

* Low or no transmission fluid: This is a severe problem that would likely damage the transmission quickly. The lack of lubrication could cause gears to grind to a halt.

It's highly unlikely the transfer case is the sole culprit in this scenario. A transfer case problem would typically manifest as a lack of power to one or more axles (e.g., 4WD not engaging), not the complete loss of all forward gears.

You should have the vehicle towed immediately to a mechanic. Driving with a completely failed transmission can cause further damage and is unsafe.