When I was back in Pakistan, I had a problem with my Mehran the gears used to get stuck and there was one mechanic on the round about when you cross liberty market, some people said ke change the gearbox others wanted to take it apart but he said ke he will do it for 300 Rs (well this was somewhere in 2002) he changed some part and changed the oil and all done in 2 hours, I paid him 400 (100 extra) after I test drove the car, the appreciation and gleam in his eyes was priceless....... I don't know if that place still exists or he has moved off some place else ?
for Kabli take a mechanic along if you don't understand this part and rebuild the gear box if you have a good mechanic