having a bad flex disc and a badly worn pinion gear allows too much pay in the drivetrain which means that individual components are dealing with higher levels of impact.

the effects are increased wear, possible driveline vibration, somewhat decreased drivability (due to all the slop in the drivetrain), and the possibility of breaking other components, sch as the tranny, driveshaft, ring gear, etc.

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'94 W124.036 249/040 leder; 8.25x17 EvoIIs
'93 W124.036 199/040 leder; 8.25x17 EvoIIs, up in flames...LITERALLY!
'93 W124.036 481/040 leder; euro delivery; 8.25x17 EvoIIs
'88 R107.048 441/409 leder; Euro lights
'87 W201.034 199/040 leder; Euro lights; EvoII brakes; 8x16 EvoIs - soon: 500E rear brakes
'70 R113.044 050/526; factory alloys; Euro lights