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Front wheel bearing/hub questions 700 1988

posted by  zrubin on  Mon Jul 23 05:49 CST 2007
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last visit: Thu Sep 20 15:45 CST 2012
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I removed the hub/bearing assembly on my 1988 740 Turbo - was going to order a replacement from FCP but they list different parts for 1988 and 1989 (both with ABS) - the part I removed looks like the 1989 part with the toothed ring for the ABS sensor. The car was built in 6/88, one of the last couple thousand 1988 model year cars - does anyone know if there was a running change or if there's some other way to tell which is the right part?

Second question - Haynes says just install the new hub on the stub shaft. The brickboard FAQ lists some hints for sliding the assembly on and a critical 23mm distance, Haynes doesn't mention any of that. Will I be able to just slide the new hub on or is there potential for the bearing race to move out of position?

Thanks

Zack
1980 245DL M46 286k
1988 745T+ M46 223k








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    Front wheel bearing/hub questions 700 1988

    posted by  Blue Horse on  Tue Jul 24 00:03 CST 2007
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    last visit: Mon Apr 8 17:57 CST 2013
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    I'm not absolutely sure, but I believe the difference between 88 and 89 is the number of teeth on the toothed rings. My original parts book shows the same hubs for both years, and that the toothed ring changes with the model year. The early type has twice as many teeth as the late ones. If I recall correctly, the numbers are 96 and 48.

    Don't know about any 23mm distance or other difficulties of installing the new hub, as I've never had to change one. I think you are supposed to use a new nut.







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