help b4 somethin\' snaps! My '76 Jimmy suddenly has started vibrating badly when I give it gas(moving only). Seems to be lacking power too. It feels a lot like the final miles b-4 a u-joint on the front driveshaft exploded(but worse). I've been under the thing every day w/ a prybar looking for loose bolts/mounts- none found- everything(incl. u-joints) looks tight. It's been whirring when cold since I bought it (6 mo.)- shifting into drive first time in AM- noise coming from converter (I.D.'d w/ bellhousing cover off)Noise goes away quickly when driving. The thing shifts fine but shudder getting worse. Is it possible converter is only problem? Any quick checks of the diffs?(d44+ 12b)- I thought of loose flywheel to crank bolts but doesn't look loose(prybar).The flywhhel does wobble just a little when idling. This truck is so basic- I love it but I can't figure out what to fix! /forums/images/graemlins/1zhelp.gif The fluid is there and red-don't know when last changed btw its a 400ci w/th350 and np203- "65k mi" 4"BDS lift 4 months ago. Thanks for any input.