A loud grinding noise in my gear at slow speeds bu nearly disappears at high speeds.

Initially i thought its a wheel bearing but when put on jack my mechanic said its gearbox bearing.

The gear stick is loose a bit but still shifts gears alright(Maunal Gear).

Whats the price of putting in a kabuli manual gear box in Rawalpindi/ISB?

Can bearings be replaced (for how much and where in RWP)?

Any experienes?