Flex Disc? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 11-01-2004, 10:18 AM
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Whats a flex disc do? how can u tell if its time to be replaced?
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#2 (permalink) Old 11-01-2004, 01:20 PM
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a flex disc is what connects the drive shaft to other parts,,most cars have u joints..bmws have flex disc"s,,,if you cant remember when it was replaced..then it needs to be,,symptoms include,,nocking noise when shifting from park/nuetral to drive or reverse,,vibrations from center/driveshaft area at speed

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#3 (permalink) Old 11-01-2004, 02:55 PM
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yeah, if u are accelerating rapidly and ur flex disc is going bad, it will have this very bad vibrant shaking, unbearable, which forces u to lay off the accelerator. it gets worse and worse.

thise connects the driveshaft to the tranny
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#4 (permalink) Old 11-01-2004, 04:57 PM
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I just replaced that and the driveshaft. Let me tell you, it can be a definite bitch to replace. Especially when you have to retorque everything and you have about a .5 inch of space to work with. and you have to drop the entire exhaust system, remove all the heat shields, and drop the driveshaft. took my dad and I about 15 hours total for removal and install. spread over about 3 days.

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