Ok Here we go. I chang Rear end housing and all. wint from drum braks to dis brake and from 308 gears to 373 gears and this is a 3.4 v6 whin I take off there is a vibrating in 1-2-3 gear and in overdrive it dose not do it I wint from 2 pice driveshift to a 1 pice and I had it balanced and new tires. all the mount are fine check filewheel it is ok, I do not no ?
can you help thanks

 

english?