94 grand cherokee, motor and trans run great. Last year had aamco put new trans in. Took them four tries to get right.221897 miles on jeep.A month ago started hearing a, not quite a roar, or whistle noise, when starting to move. Starts at 12 mph in 1st, to 2nd, drive, overdrive. The speed of the noise increases and decreases with the speed i'm going. Cruising in overdrive, mash button to go into drive noise quitens down. Speeds of 60 or more no noise. Slowing down I can really hear it. It is also vibrating or shaky when going very slow.U-joints?Wheel bearings?Need help I use jeep for work. No jeep no work!