Hi all. New to the forum. I've enjoyed and learned a lot from lurking around for the past few months and reading all of your posts. I have a problem that may or may not be unique, but my searches haven't turned anything up. I have a '78 FJ40 with a SBC and an AA conversion kit. It is making a growling noise and vibration on deceleration. The source seems to be the transfer case, and it only happens when in 4 wheel drive. The t/c was rebuilt by a previous owner about 5K miles ago. The fluid looks fine. I realize that the AA mount that bolts to the rear of the t/c makes a pretty solid connection with the frame that may transfer more vibration than the stock configuration, but I wonder if others of you with SBC and AA have noticed the same growling noise and vibration.