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Diff output cover running clearance.

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iansmini67

Post subject: Diff output cover running clearance.

Posted: Mon Apr 13, 2020 6:41 pm

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Joined: Sun Jul 13, 2008 8:26 pm
Posts: 276
Location: Coffs Harbour

I have needed to replace the diff output side cover bearings on my S box and the new ones require reaming. Does anybody know the running clearance for these. Running Hardy Spicer couplings.

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1965 Smooth roof Van
1969 Cooper S MK2
1970 Mini K

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Ian_B

Post subject: Re: Diff output cover running clearance.

Posted: Mon Apr 13, 2020 6:47 pm

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Joined: Wed Jul 02, 2014 11:38 am
Posts: 508

The Doc will know

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gtogreen1969

Post subject: Re: Diff output cover running clearance.

Posted: Mon Apr 13, 2020 8:18 pm

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Joined: Fri May 02, 2008 3:07 pm
Posts: 5123
Location: The Internet

Go for 4 or 5 thou, 1 or 2 thou is too tight

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iansmini67

Post subject: Re: Diff output cover running clearance.

Posted: Mon Apr 13, 2020 8:22 pm

848cc

Joined: Sun Jul 13, 2008 8:26 pm
Posts: 276
Location: Coffs Harbour

Thanks for the reply. Will go with 5 thou.

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1965 Smooth roof Van
1969 Cooper S MK2
1970 Mini K

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drmini in aust

Post subject: Re: Diff output cover running clearance.

Posted: Tue Apr 14, 2020 7:03 am

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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW

5 thou is too much, I bore them in the lathe to .002" clearance.
If they bind something is pushing the drive flange out of line, probably a bent collet inside it.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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gtogreen1969

Post subject: Re: Diff output cover running clearance.

Posted: Tue Apr 14, 2020 9:53 am

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Joined: Fri May 02, 2008 3:07 pm
Posts: 5123
Location: The Internet

Go with the Docs measurement. Dont worry about me - i was thinking of the freeplay when they are rocked back and forth.

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