<E34) Re-send: 535i Drivetrain Vibration

[Thompson Ken-EKT001 <EKT001@xxxxxxxxxxxxxxxxxxxxx>]

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I've got a strong shudder and vibration during acceleration. 
I'd like to get some feedback on the cause, history of similar BMW
models, repair options, and any Dealer Bulletins concerning the subject.
It happens during strong acceleration from stand-still, and during
strong acceleration between 19 and 27 mph.  It's been diagnosed as the
center bearing on the drive shaft.  This means that something caused the
center bearing to wear, usually driveshaft balance or faulty U-joint
axis.  The car is automatic of 04/90 production date.
After some research, it seems my options are:
- - - replace center bearing as a minimum, inspect U-joints(2) for
possible
problems
- - - if U-joints are found to be bad, then complete drivetrain
replacement
is necessary
- - - for drivetrain (consisting of 2 U-joints, center bearing, and rear
CV)
the options are:
- - - BMW part:  >$700
- - - re-manufactured part:  $450 + $150 (returnable w/good core
exchange),
with 1-5 day shipping
- - - pull bad drivetrain, ship out for re-conditioning:  ~$350 + shipping
- - - Labor is estimated at 3 hours, potential down-time is 1 to 7 days.

Can someone recommend best options for remedy (best being best
value....quality, performance, at lowest price)?  Know of the Dealer
Bulletin which deals with this and best source to obtain it from?  Is
this condition a chronic weakness of these models?

Regards,

Ken Thompson
San Jose, Ca.
Golden Gate Chapter
- - - '90 535i
- - - '78 R80/7

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