Differential pinion seal

91 Notchback · 01-31-2005, 07:49 PM

When replacing the pinion seal in the rear end, is it necessary to
install a new crush collar or can i just install teh new seal and torque
the pinion nut to spec?

Jeff Chambers · 01-31-2005, 08:29 PM

Spec being what? Pinion nut torque is specified as a running torque on the pinion gear, sans the differential and ring gear. If you've got it this far apart, why not just install a new crush collar in the process.

I've seen people do this, usually with one of two results: (1) pinion nut eventually backs off and the gear set is trashed or (2) too much bearing preload results in the bearings burning up in a hundred or so miles.

Even the factory service CDs call for the installation of a new crush collar.

Ieatcamaros · 02-01-2005, 09:04 PM

No way I'd pass up using a new crush sleeve.

01-31-2005, 07:49 PM	#1
91 Notchback Registered Member Join Date: Apr 2004 Location: windsor, Canada Posts: 7	Differential pinion seal When replacing the pinion seal in the rear end, is it necessary to install a new crush collar or can i just install teh new seal and torque the pinion nut to spec? __________________ 1-5/8 mac unequal legnths cold air induction march pulleys 3.73 gear b&m ripper 2 1/2 mac cat back exhaust p245/50r16 BF comp TA's in the process of installing new H,C,I combo

01-31-2005, 08:29 PM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Differential pinion seal Spec being what? Pinion nut torque is specified as a running torque on the pinion gear, sans the differential and ring gear. If you've got it this far apart, why not just install a new crush collar in the process. I've seen people do this, usually with one of two results: (1) pinion nut eventually backs off and the gear set is trashed or (2) too much bearing preload results in the bearings burning up in a hundred or so miles. Even the factory service CDs call for the installation of a new crush collar. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-01-2005, 09:04 PM	#3
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: Differential pinion seal No way I'd pass up using a new crush sleeve. __________________ The sig says it all.

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