Clutch issue ?

[banpei]

(06-01-2019 10:46 AM)jondee86 Wrote:  PS: And yes, it is not unusual for the viscous drag and internal friction of
the moving parts inside the gearbox to cause the rear wheels to spin with
the rear wheels off the ground. The torque transmitted to the driveshaft
is multiplied by the diff ratio and becomes sufficient to overcome the
friction of the differential and wheel bearings.

But when the vehicle is on its wheels on level ground, the rolling resistance
of the tires is far greater, and (under normal circumstances) the tiny
amount of torque being sent to the rear wheels is no way enough to roll
the car forward at idle.

Because a picture/video is way more clear than words, forward to 8:36 in this video:

But yes, this is most probably not the issue that has been described here.