in 4th gear.

all sorts of stuff can and cant happen , ive been lucky , when i was young and a bity silly i drive 2 sydney and bnack twicwe with no rollers in rear uni with no drama , i also drove a gemi for about 50 km with the center bearing ripped straight off the car also , you should have heard it
just something i done recent to test a tranny - clevo with no water , oil , balancer , alternator or anything else on front , rod snapped , holes in both sides of block and sump torn out right across , running on thinners through a can with rear kacked up to test tranny , it went for about 20 minutes with no drama reving the hell out of it to test tranny , stopped and started a fewe times , u just couldnt kill it

easy fix tailshaft loop

Tailshaft length and speed compared to previous models, lower diff ratio and overdrive combination, the old diff ratios were commonly 2.75 (9")2.77, 2.93,and 3:1(9" manual Falcons), compared to the common 3.08, 3.23 and 3.45 in 4 speed auto Falcons.

There were other ratios but most of those ratios were either rare or fitted to lower spec cars (200CI etc) which were not expected to achieve a high speed.