DFI, Batch Fire, and other myths

[Greg Hermann]

>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

The front bearing also takes the gear thrust when the gears are loaded on
the coast side of their teeth. (like with regular cut gears, driving
forward in the front end of a 4x4)

One main point is, that with a crush sleeve, tightness of the nut is
limited, so it is way more likely to come loose---

Greg
>----------
>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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