What are the effects of having worn out flex-disc's and a bad pinion gear. Does it effect torque ? What are the negatives.????

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1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."

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

In my experience, the flex disk does not "wear". It can fail and I had one fail on my 230SL when "driving" it on Summit Point Race Track. It is not hard to replace.

I also have not heard of the pinion gear wearing enough to cause real problems. The rear end bearing can go bad and they can be replaced and the gears realigned.

It really depends on what symptoms you are experiencing and how serious they are.

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"