I've suzuki mehran the noice just like hammm is coming during 45 to 75 kmh..plz suggest the economical solution to remove this noice..
can u elaborate further about nature of this noise
the noice just like that something is running without lubrication buti've checked gear oil its ok.engine foundatio are also checked...the noice is comming when 45 kmh and upto 75 eather in 3rd gear or top gear...
if it is not a constant noise and somes at certian speed as u have mentioned then chances are there that its gear box noise. what gear oil are u using?
What should done..change gearbox or any parts in gear box i mean any bearing etc..
There's no way anyone can diagnose NVH without listening to it but the sumptoms are consistent with a failing axle/diff bearings.
It could be bearings aswell because most mehrans have this problems there bearings start making silly sounds.........Or it has to be mechanically checked then you can diagnose any problem..Max