Pinion seal replacement.. - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 07-10-2011, 05:29 PM Thread Starter
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Pinion seal replacement..

I know I should probably post this in the drivetrain problems section but I usually don't get alot of responses there. I need to replace the pinion seal on my 05 f250. Never done this before so how hard is it and what all will I need besides the new seal. Will be changing to amsoil fluids when I fill it back up.


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post #2 of 14 Old 07-10-2011, 05:59 PM
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just did mine last friday.

mark the drive shaft to flange.
remove driveshaft 4 bolts.
remove the pinion nut.
we used a screw type puller to remove the pinion flange.
dug out old seal with seal remover.
installed new seal.
tap flange back in seal.
tighten pinion nut
line up driveshaft marks and tighten bolts.
DONE!

Pretty straight forward took about 20 minutes top.

helps to have a puller and the seal remover.
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post #3 of 14 Old 07-10-2011, 06:33 PM
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My recommendation ... take it to a specialist. Technically, you suppose to "replace" the crush washer anytime you release the pinion preload.

I did mine myself ... even did it the "best" way which is to use an inch-lb torque wrench to set the rotational torque back. 9000 mile later I had to replace the pinion bearings cause I got it a tad too tight. This was much more expensive than if I would've just taken it somewhere and had someone replace the seal in the first place.

Just saying what can happen if you don't get the preload back perfect.

2006 Ford F-250 Super Crew Lariat FX4 6.0L PSD

Last edited by 98SurplusExpy; 07-11-2011 at 03:13 AM.
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post #4 of 14 Old 07-10-2011, 08:20 PM
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Keith pretty much has it nailed although you must mark the pinion nut to the pinion before disassembly. It's an invaluble reference.

I will say, the pinion flange on the 10.5 is one of the tightest fits to the splines I have ever worked with. Puller to get it off and heat to get it back on.

As mentioned, you have to be sure of your pinion nut location to the pinion when going back together. If you go one rotation too far past your nut marking, you will likely be doing pinion bearings soon.

I don't recommend this job for a non mechanic.

Steve
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post #5 of 14 Old 07-11-2011, 12:45 PM Thread Starter
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Other than a new seal is there any other parts I need to order.



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2005 F250 CCSB 4X4
PHP Atlas 40 FICM Tune
PHP ECM/TCM Rollback
Old ECM VXCF9N4
New VXCF4N3
Old TCM TQCI1NA
New TQCI0N3
Zoodad Mod
Delo ELC Coolant
Rotella T6 w/Rev-X
Fumoto Valve F-111
2009 Rear Bumper
Newton Lifts 2.5" leveling kit


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post #6 of 14 Old 07-11-2011, 03:59 PM
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yes, definitely index the pinion nut to the pinion. take a small chisel and tap a mark in each one lining them up

i've done dozens of seals this way without any concerns

-Matt

Ford Senior Master Tech

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post #7 of 14 Old 07-11-2011, 05:31 PM
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yes take chisiel (can't spell that word for life of me) and mark pinion nut to pinion this is the way i always do them and never have a problem. Just line the mark back up when putting nut back on this is the most critical mark to make.

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post #8 of 14 Old 07-11-2011, 06:00 PM
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Be careful if you decide to do it yourself-you can't just tighten the pinion nut back on, You have to set bearing preload, and make sure you don't alter pinion depth. It can be done, but honestly I've seen people destroy differentials doing it themselves.



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post #9 of 14 Old 07-20-2011, 10:35 PM Thread Starter
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I've had a couple people tell me to check the vent tube and make sure its not stopped up. Would this be the rubber hose coming off the drivers side of the rear end housing and going up and clipping to the frame with a plastic fitting on the end.

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2005 F250 CCSB 4X4
PHP Atlas 40 FICM Tune
PHP ECM/TCM Rollback
Old ECM VXCF9N4
New VXCF4N3
Old TCM TQCI1NA
New TQCI0N3
Zoodad Mod
Delo ELC Coolant
Rotella T6 w/Rev-X
Fumoto Valve F-111
2009 Rear Bumper
Newton Lifts 2.5" leveling kit


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post #10 of 14 Old 07-21-2011, 09:36 AM
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Quote:
Originally Posted by Sesco4 View Post
I've had a couple people tell me to check the vent tube and make sure its not stopped up. Would this be the rubber hose coming off the drivers side of the rear end housing and going up and clipping to the frame with a plastic fitting on the end.

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YUP! Thats the vent tube.

I checked mine first too...no clog
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