The Mercedes official shop manual says "... turn the nut (with a rubber
boot) on the driveshaft two turns ..." Is this necessary to do when
removing the drive shaft to replace the flex disks. The nut is too big for
any of my wrenches, and there is very little access to it because the
catalytic converter is in the way. I'm hoping that I will be able to drop
the shaft down, without this missed step leading to problems later in this
job... Any suggestions??
Man ... are these nuts tight on the rear flex disk! Any tricks to getting
these things loose?
Should I replace shaft seals on the diff and transmission while the
driveshaft is out? I know they're inexpensive seals, but is it difficult to
Don't drop the driveshaft... that's alot of work. If you are doing this
yourself on your driveway, then simply work the bolt out... then bring down
the car again and roll it so you can get to the next bolt.
Best and easiest way is on the lift where you leave the tranny in neutral so
you can rotate the driveshaft.
Alternative is drive car on ramp in front... then use two shop jack... not
those skinny POS... to raise the rear end and then put safety jack at the
rear end to secure it.
Thanks for the input. I have the car on 6000 pound rated jackstands on the
front. A heavy duty hydraulic jack is holding up the transmission right now
since I removed the support under the transmission mount. With the
transmision mount out of the way, I was able to get acess to all of the
bolts on the shaft side of the front flex disk - however it took practically
every compbination extensions, swivels and sockets in my tool box.
With your feedback, I will change my plan and now try to remove the other
three bolts from the tranmission side of the front flex disk, and then slip
the new disk in and bolt it back together. I wonder if I should replace the
shaft seal at the rear of the transmission.... do you have an opinion this?
(My trnsmission is leaking fluid really bad, but I don't know the source
yet - I can't tell if it is leaking around the shaft or not)
Any leak from tranny is obvious... traces of fluid would be visible. If you
needs to change your rear seal, then it is time to do it... with flex disc
out and drive shaft out of the way... However, you need a 30mm deep socket
or I believe 1 3/16" socket (3/4" drive available at Sears) with 3/4" to
1/2" adapter so you can use your 1/2" wrench... You will insert that adapter
halfway because the tranny shaft will stick in a bit.
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