Vibration In Lifted '89 K5

[89BLAZ]

I WAS WONDERING IF ANYONE COULD HELP ME OUT? I HAVE A '89 K5 LIFTED WITH 8" SUSPENSION KIT. I AM RUNNING 35" TALL TIRES WITH ALL THE NECESSARY DROP BRACKETS(SWAY BAR, TRANSFER CASE). I HAVE A REAL BAD VIBRATION THAT FEELS LIKE IT IS COMING FROM THE TRANSMISSION-TRANSFER CASE AREA. THE DRIVESHAFTS HAVE BEEN BALANCED. THIS ONLY OCCURS UNDER LOAD AND HAS DONE SO SINCE I LIFTED IT. I HAVE HAD IT LOOKED AT AND THEY TOLD ME I NEEDED TO DROP MY CASE DOWN MORE. I HAD 1" SPACERS AND NOW I HAVE APPROX 1 1/2". IF I DROP IT ANY MORE IT LOOKS LIKE MY TRANNY WILL HIT THE FLOOR. PLEASE CAN ANYONE SHEAD SOME LIGHT ON THIS SUBJECT....I REALLY DON'T WANT TO GO TO A 6" KIT TO GET RID OF THIS PROBLEM.


THANKS,
SEAN