sterling 10.5 problems after pinion seal change - Ford Powerstroke Diesel Forum
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Old 10-19-2013, 04:35 PM
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sterling 10.5 problems after pinion seal change

Had a bad oil leak from the pinion seal. Decided to change the seal, abs sensor, rear cover gasket and fluid. Everything went well till I got to the pinion seal. Nut came off easy but took an act of god to get the yoke off the rear end. Ended up using a jaw puller to get it off. Took old seal out and got housing cleaned up and yoke. Installed new seal with no problem. Got yoke back on, nut and drive shaft. Filled with royal purple and then wen for test drive. That's where the problem started. Bad vibration in the cab and drive line when you let off the accelerator. Almost sounds there is a howl or light grinding for the rear.

Truck is a 02 f250 crew cab 4x4. Rear axel is a sterling 10.5 with the limited slip carrier. If anyone has any idea on what went wrong or what the issue is let me know. Need to get it back on the road asap. Only vehicle at the moment.

If it helps any I marked the yoke and pinion to put it back exactly where it came off from. And I forgot to count the number of turns it took to get the nut off. But lined it back up to the rust line on the pinion threads. Put pinion still seems sloppy. Feels like I can move it up,down side to side more than I should be able to.
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Old 10-19-2013, 10:40 PM
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The torque of the pinion nut is extremely important to your bearings. Don't drive the truck anymore till you get if fixed or you may end up needing a new axle/gears/bearings. At this point I would pull the cover to inspect the gears for damage. After that, pull the shafts and pop the carrier out so you can set the proper preload on the pinion. You could have cheated if you marked and measured everything at the beginning but your safest bet is to set preload to factory specs.
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Old 10-20-2013, 07:06 AM
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yup, JS naile it. Once nut/yoke was removed, you messed up the preload on the CRUSH SLEEVE...(i dreaded doing this with my axle in pisspoor shape, so opted the "find used axle" as my fix).

You'll need a new crush sleeve and/or have truck hauled to axle shop and paythe few hundred to have it set correctly.

It takes 450#-600# to crush the sleeve, but only 8-12 INCH lbs to actually "turn" the axle assy once the sleeve is set.
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Old 10-20-2013, 08:07 AM
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dont forget to set pinion depth too!
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Old 10-20-2013, 09:28 AM
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Starting to sound like I may just put in another axle.....Anyone need a limited slip carrier ...lol
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Old 10-20-2013, 01:49 PM
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here's your axle....

ford f250

Parting out 2005 F250 extended cab
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Old 10-20-2013, 02:50 PM
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Thanks for the lead on the axle timmy, but contacted the guy and its already sold.
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