Checking Rear Diff. Fluid - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 08-10-2010, 08:02 AM Thread Starter
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Checking Rear Diff. Fluid

I can see oily stain on exhaust where the diff. fluid is being spun.(where drive shaft joins to rear diff) I took a quick look and am not sure where to check if the diff is full. How do you check the level? Is the vent line connected to the axel where the break line Ts off? What diff fluid to use? Mainly, I want to make sure the rear diff is full. Any help appreciated.

'08 F250 Crew Cab King Ranch 6.4L (White)
4" Zone Offroad Lift
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post #2 of 17 Old 08-10-2010, 08:39 AM
shhhhh, can you hear it?

 
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if you look from the back of the truck forward at your diff. there should be a plug about halfway up the aft cap maybe a lil more than halfway.take it off and stick your pinkie in there,if you get fluid you are good if not you need to add some.your manual will tell you what kind but its probably 70w95 or somewhere there about.the vent line should be a rubber hose coming off the top of the diff.it may or may not go to the brake line t on our trucks.but it sounds like you may have a pinion gear seal leak

Patrick
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08 6.4L ECSB
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Quote:
Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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post #3 of 17 Old 08-10-2010, 10:01 AM Thread Starter
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Didn't see a vent line from the top of the diff. Is it possible it is missing? I see the plug, but don't have the tool to remove it. Can anyone tell me what I need to remove the plug to check the fluid level.

'08 F250 Crew Cab King Ranch 6.4L (White)
4" Zone Offroad Lift
Spartan Tuned
Spartan TCM
DPF/CAT Delete
EGR Delete
ARP Head Studs
S&B
MBRP
35x12.50x22 TOYO M/T
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post #4 of 17 Old 08-10-2010, 10:06 AM
shhhhh, can you hear it?

 
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it could be possible i suppose that its missing,should be at least a nipple fitting up there for the hose to slide over.that plug should be like a standard sized wrench size like 3/4 5/8 maybe smaller.or it is possible for it to be a 1/2 or 3/8 ratchet drive plug.if you go to auto zone or something of the sorts they should have a tool you can borrow long enough to get the plug off and check the fluid.

Patrick
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08 6.4L ECSB
S&B intake,H&S Black Maxx,5" Pipe,Trac. Bars
13.77@100.63

OIF 07-08 16 months OIF 10/OND 10-11
Quote:
Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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post #5 of 17 Old 08-10-2010, 10:18 AM Thread Starter
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Headed to Autozone now...thanks for your help.

'08 F250 Crew Cab King Ranch 6.4L (White)
4" Zone Offroad Lift
Spartan Tuned
Spartan TCM
DPF/CAT Delete
EGR Delete
ARP Head Studs
S&B
MBRP
35x12.50x22 TOYO M/T
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post #6 of 17 Old 08-10-2010, 10:20 AM
shhhhh, can you hear it?

 
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yea no problem man.i like helping.they can also tell you for sure what lube goes in her rear end

Patrick
TAPS Historian


08 6.4L ECSB
S&B intake,H&S Black Maxx,5" Pipe,Trac. Bars
13.77@100.63

OIF 07-08 16 months OIF 10/OND 10-11
Quote:
Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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post #7 of 17 Old 08-10-2010, 10:24 AM
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It's a 3/8 if I remember correctly. I just used a ratchet with a swivel on it to get a better angle.


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post #8 of 17 Old 08-10-2010, 10:26 AM
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Welcome to guzzle's Rear Differential Maintenance Web Page

Scroll about half way down and it shows the plug to fill/check the diff. Different truck but same concept.

Man yall are too quick for me...had the tread over before I even got my two posts in haha


Tornado Alley PowerStrokers Director




2007 F-350 CCLB XLT FX4 ZF6 08 Mirrors, CTS, Gearhead, BD EGR Delete, Coolant filter, B&W, Custom rear springs, still rockin the stock head bolts and clutch!


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post #9 of 17 Old 08-10-2010, 10:28 AM
shhhhh, can you hear it?

 
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you stalking me byron?

Patrick
TAPS Historian


08 6.4L ECSB
S&B intake,H&S Black Maxx,5" Pipe,Trac. Bars
13.77@100.63

OIF 07-08 16 months OIF 10/OND 10-11
Quote:
Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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post #10 of 17 Old 08-10-2010, 10:32 AM
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Nope I always check the new posts and this was on the top of my screen...I prefer to stalk those with 2011s haha


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2007 F-350 CCLB XLT FX4 ZF6 08 Mirrors, CTS, Gearhead, BD EGR Delete, Coolant filter, B&W, Custom rear springs, still rockin the stock head bolts and clutch!


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