So my son-in-law is selling me a 95 toyota tacoma ,regular cab, 5spd , 4wd,BIG 2.7 ltr for dirt cheap if you rember my "i bought a cheap jeep " post ya know what i'm talking about

. Well i got it home and was going to do some maint stuff on it like oil change , tranny fluid change ,replace the squelling belts and so forth , well after doing all this thinking it's going to be great little truck to run around in since my other 3 toys are all down (audi still running fingers crossed) i leave to head up to rampart range to shoot the trash up there well i take it easy lettting her get up tp temp and what not, well i hit the hwy and mash the throttle in 2nd gear well she rolls up the rpm range great until about 2,800 rpm from there up till redline i have this god awful vibration?
so i went up to the range taking back roads anyway ,all the while trying to figur out what is causing this, so once i'm back home i start looking around. all the motor mounts look good there's nothing rubbing on anything and no sounds like that, so i have the wife seat in the cab and put it in gear with the transfer in neutral and hold it at 3,000rpm (this seems to be the worst in the range ) and i start crawling around underneath it looking for signs of something and i get nothing until i notice that when your looking at the tranny/rear driveshaft you can see them vibrating like crazy and you can feel it also.
so if ya guys got any ideas let me know or a good shop to take it to i need it running till i get the rabbit,sammy back together
i'm going to bring a block of wood home from work and jack the rear of the tranny up and see what happens its to hard to tell if the rear mount is busted or not cause it's bolted to a crossmember.