I have 2005 Suzuki Mehran and here are some problems:1- I have replaced the Right Hand side of Axle 2 times in 1 year, I drive very cautiously and avoid all potholes or uneven road. last time while i was driving towards ISI on Motorway i heard a smal tuk sound while driving straight! later i found out the axle which was recently changed was broken (tuk tuk sound again). now when i m driving straight, i hear tuk tuk sound for few sec n then no noise!what exactly went wrong?? which reliable brand and other parts should i purchase and can any tell me what care must be taken when replacing axle? did the mechanic forgot to replace any part (even though i was standing beside him while replacing the part). I dont remember is he applied grease or not!? is greasing important or not? 2-I want to know which plug is best in terms of fuel efficiency? need da model number and price!3-when ever I put the car on first or second gear it gives jatka when accelarating but i believe its not related to engine problem but related to gear or axle? one mechanic said that clutch plate needs to be replaced while i believe that its related to axle because when i repaced the axle, the car accelerated smoothly without any jatka! (hope anyone understood this issue)4- reliable gear oil?Awaiting quick response! Thanks!