drive shaft balance 73 115.110 220D - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 11-23-2011, 09:31 PM Thread Starter
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drive shaft balance 73 115.110 220D

I could not get enough ground clearance to remove the drive shafts and took it to a normally competent mechanic for the center bearing/housing replacement.

It vibrates at 40 mph and changing the splines a notch either way has not fixed it.

does anyone know how the factory did the balancing? I see the weights are aprox. centered between the 2 ears of the shaft.Can I assume the weights were welded on both shafts from the same balancing after production and they are an indication of original alignment?

How would the ears line up on both shaft ends? (like two up and one down on both ends in parallel or opposite so the other end has one up and two down?

the entire process is time consuming since getting to the shaft is under other parts and so the trial and error technique is arduous. and i have to pay for lift time in a shop. (the original mechanic defaulted and gave me my money back as he threw up his hands)

any info is helpful.

I have seen postings on taking the shaft assembly to a pro specialty shop, but what about the alignment on the transmission and rear end connections? What are the critical things and are there any short cuts to get it back to functional?

I have gone through two of three rear ends and do not want to destroy this one with faulty alignment.

thanks
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post #2 of 5 (permalink) Old 11-24-2011, 12:00 AM
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Hi lowteck
sent you an email but for anyone searching the thread yes the flexdisc has to be installed with a leg from the DS and the dif on each of the buffer pads on the disc in such a way as to keep the pad under compression when the DS turns in the forward direction, the pic is from a landrove disc as they dont have a decent pic in the mercedes manual. the arrows always indicate the way the bolt goes through the disc.
the yokes at each end should always be 1 leg up and on the other side 2 legs up, however they have to be phased with the ujoint in the middle too.
cheers
Barri
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2001 e320 wagon, 1973 350sl euro, 1974 450sl, 1976 450sl, 1978 450 slc euro
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post #3 of 5 (permalink) Old 11-28-2011, 01:36 PM
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Before removing a MB driveshaft, each member should be marked in association with each other and should be replaced in the same relationship. The location of the weights do not correspond with each other. MB balances the entire shaft before it's put in the car. Where to go for a re-balance ???
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post #4 of 5 (permalink) Old 11-29-2011, 08:01 AM
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For a rebalance, look for machine shops, or shops that specialize in drive shaft balancing (no kidding).
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post #5 of 5 (permalink) Old 11-29-2011, 09:22 AM
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yes - grubeguy has it right - dont know where you are but up here in the PNW we have a franchise called drivelines NW that only works on drivelines. They will balance a multipiece shaft for $70 - or did the last time I used them
cheers
Barri

2001 e320 wagon, 1973 350sl euro, 1974 450sl, 1976 450sl, 1978 450 slc euro
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