Does it have a 2-piece driveshaft? The carrier bearing can be shimmed to change the angle of the center universal joint and the junction of the two driveshafts. Sometimes just a fraction of an inch of change in the position of the carrier bearing makes a big difference.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!