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JohnJL JohnJL is offline
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Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
Rear wheel bearing install failure - help before I ruin another bearing?

Hi all,
So I counted and have done 8 of these before, but I encountered a new failure putting a bearing in the rear of my wife's 1985 911 cab...

The trailing arm is out of the car. Using the expensive SKF bearings...went in no problem.



Now, its been a while, but I recall once I had the bearing is, simply insert the inner stub axle from the inside (tranmission side) and insert the outer hub from the outside, then use the castle nut to draw them together. I thought that would concentrate the force only on the inner bearing races as they drew together.

Well, that didnt happen. Both the inner and outer became bound up as they drew together and spinning them once loosened a bit showed the bearing was damaged...it barely spun and was "notchy." When taking them apart both inner races came off partially pressed onto their respective hub and stub axle shafts. I put it all away last night and this morning will remove all the old bearing and start with another new bearing.

My memory is admittedly not great, so I went back and checked the 101 book, the Factory Manual (section 401-20 has the good ole' "installation is the reverse of the procedure") and the site here but still not clear enough to want to take on wrecking more $80 bearings at 5-6 days' delay each.

Did I just get unlucky with this one? I contemplated gently prying the races off both sides of the new bearing, pressing them onto the hub and stub axle separately and then assemlbing, but I didnt see reference to that in site posts.

Can someone pls confirm the proper "install stub axle into rear bearing" and "install hub into rear bearing" procedure? Was I mistaken that once the bearing was installed in the trailing arm, simply using the stub axle's threaded end and castle nut and the hub to draw them together is wrong?

Thanks!







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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy

Last edited by JohnJL; 03-06-2021 at 06:42 AM..
Old 03-06-2021, 06:39 AM
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