DFI, Batch Fire, and other myths

[Marc Piccioni]

Not quite right......

The crush sleeve is used to set the front and rear pinion bearing pre-load, 
the front pinion bearing takes the thrust from the driveshaft. If the 
pinion nut comes loose then the pinion will move rearward and instantly 
chew the ring gear.

/Marc

----------
From: 	Gary Derian[SMTP:gderian at cybergate.net]
Sent: 	January 27, 1999 1:31 PM
To: 	diy_efi at efi332.eng.ohio-state.edu
Subject: 	Re: DFI, Batch Fire, and other myths

The way I know, the crush sleeve is only used to hold the inner bearing
races against the pinion gear to keep the races from rotating relative to
the pinion.  It doesn't take any gear loads.  You could remove the crush
sleeve and loctite the inner races to the pinion.

Gary Derian <gderian at cybergate.net>

>
>Betcha it was a crush sleeve. The too long driveshaft pounded the 
companion
>flange on the pinion into the sleeve hard enough to smush the sleeve 
beyond
>where it was supposed to be, and the rest was history. No doubt the too
>long shaft was what got the rear mount bolts too (before you fixed them!
>
>The crush sleeves are cheap for the mfgrs to use in a production
>situation--beyond that they are not worth a #@$% !!!! For any performance
>application, or even just for a quality rebuild, a conversion to positive
>pinion preload shims is HIGHLY recommended for ANY rear axle!!!
>
>Regards, Greg
>
>




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