From digest.v7.n586 Thu Nov 13 19:02:32 1997
From: "Avedis, Alex _at_ GRNK" <AvedisA_at_HUB01.TDS-GN.LMCO.com>
Date: Thu, 13 Nov 1997 12:06:36 -0500
Subject: E 28 Guibo Replacement
There is no quick way to do a guibo. However to answer some of your
questions below, yes there are some shortcuts. You will have to
significantly lower your exhaust. If it's old, now is the time to consider
replacement. Undo the bolt at the way end of the exhaust which the big
rubber donut is looped around and support it. Remember lower it too much or
too quickly can equate to a cracked exhaust manifold very quickly. Undo the
two rubber donuts on each side of the muffler section and the center clamp
at the transmission. Plan on replacing it if it's the orig one. (You
didn't state mileage in your post). Gradually lower the exhaust enough to
get clearance to the heat shield. Remove it (10mm nuts) and you will see
the answer to your next question. Loosen the collar nut.
Now you can remove the guibo bolts noting which way they went in by length
and how they were facing. They will be very tight (approx. 80 ft-lb.) You
will see the vibration damper if your car is so equipped. Mine was and was
bad due to the gearbox fluid contaminating the rubber. The part was about
$170 (Bought 2 years ago from Steve D'G) .
Push the front half of the driveshaft back into the rear half and you
should now have enough clearance to swing the driveshaft out of the way and
rest it on top of the exhaust. Loosen the collar nut more if it is
The "while you are there bug" will hit you right about now. Check and/or
replace shifter bushings, transmission seals (3 in the back) and
transmission mounts. This WILL make a big improvement. If you replace the
output flange seal follow the directions in Bentley TO THE LETTER.
Assembly is basically the reverse of removal (don't you hate that). Use
new hardware where indicated in Bentley.
Good luck and happy torquing. Best!
BMW CCA Member
81 320i 101k
87 535i 130k
From: Ethan Stock <ethans_at_uclink4.berkeley.edu>
Date: Wed, 12 Nov 1997 15:11:30 -0800
Subject: <E28> Quick and easy guibo install/questions/quick tip
I decided it was time to get rid of that lovely "plech" sound every time I
shift. I crawled under the car last week, the guibo was torn & worn, so I
ordered a new one and am ready to install this Saturday.
- As I recall, the guibo under my car did not look exactly like the new
guibo I got in the mail. In the Bentley manual, there is mentioned a part
called the "vibration damper" and a lousy photograph of the general guibo
area. Does anyone know anything about this part? Or is the flex disk
I have (which is clearly the right part) the only thing that I need to
- Replacement protocol for the guibo in Bentley says 1) remove
driveshaft, and the driveshaft replacement protocol says 1) remove
exhaust. can I avoid all of this? There is a spline joint in teh middle
of the driveshaft which I believe allows forward-to-back motion in a
limited range. Does anyone have experience with doing this job? Can I
away with pushing the front half of the shaft back and sliding the new
guibo in? Any advice appreciated.
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