Just got my Genesis all back together after Ripmax replaced both front and rear diffs and all spur gears under warranty (there is hope for UK owners at last). I took it out for a bash yesterday and at certain speeds the whole car was shaking/vibrating quite badly so much so that the car was almost uncontrollable. At first i thought it was as it was changing into second but it seems to do it all the time. If i lift the car off the ground and give it a little gas it really does shake bad. What have i done wrong? the diffs came back ready assembled and marked front and rear i followed the instrutions to the letter on reassembly. The only thing that is different from before is that i have removed the center lock diff and put the supplied gears in. Also occasionally the genesis would lose drive to all wheels as if it was in neutral but if selected reverse the forward the problem went away but i'm thinking the shaking is causing the problem. Any ideas as what to check before i do a complete strip down again?