I very much doubt it what if you put the back on the front and the front to the back the vibration should change then. (i think) Unless you have some kind of play and a mount, driveshaft or bearing.
yea i know what you mean mate, i had that on my old car at one point balanced them and mate so much difference. i would try somewhere else tomorro mate. if you dont get any joy drop me a PM and ill get them dont over in Renault Minute