Looks like Steve may be right.The 12in. section of driveshaft between the tranny and the carrier bearing has backed off from the tranny almost an inch . I can see about 1/2 inch of the spline and with about 3/16 in. play in the shaft I can see the grooves in the spline worn where it and the driveshaft have almost uncoupled .
What would cause this and what's involved in fixing it? Is it a problem with the tranny , with the carrier bearing or neither of either?