ford excursion rear differential fluid capacity

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Expensive lesson on differential fluid change (long read)

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Just wanted to share my experience with you in hopes that some of you will not experience the same thing. I changed the diff fluid in my Excursion at 90k I used Valvoline synthetic (75-140) and an additive from Napa. When I changed the fluid everything appeared to be ok, a little sludge on the plug but the fluid was still translucent and not really any ferrous metal shavings. My wife drives the Ex more than me so I didn't notice anything out of the ordinary. About a month after the fluid change she told me that it sounded like something rubbing when she turned a corner. I took it for a test drive and noted the same thing but it wasn't very noticeable and you had to really listen to hear it. I pulled the fill plug and had a large amount of ferrous metal stuck to the plug. I contacted and local axle shop that I trust and told them the story. They told me to add 2 bottles of the Ford friction modifier to see if it helped. Rather than cut the corners I did another fluid change and added 2 bottles of the Ford friction modifier. Problem still present. Drove it for a month or so but not many miles to see if problem would go away but it didn't. Finally had the axle shop take a look at it last week. Clutches were ok but shims/spacers worn completely through, both bearings bad and pinion bearing looked good but made noise when spun. Ironic about the pinion bearing because I thought I could hear it as of late. Needless to say the rear end was rebuilt minus the ring and pinion gear. A guy from the shop did it on the side for $675 which I didn't think was too bad considering what he has to do. I'm not saying an after market additive did this but i'm sure it contributed. I do not drive the Excursion hard, don't tow anything, the diff has never been in water. I can't help believe that the aftermarket additive did not allow the clutches to operate normally and allowed the shims/spacers to wear causing metal to run through the bearings and detroy them. The axle dude said that it looked more like fluid breakdown to him. It sucked regardless, didn't expect that at 90k.  

Wow, sorry to hear about this. Thanks for sharing this and I will stick to the Ford friction modifier. Hard to imagine that another brand of modifier might be so far from correct to cause this but definately not worth the risk.  

Man that sucks, sorry to hear it The Valvoline synthetic doesn't need the modifier. Don't know if adding the modifier would cause the problem. I used the very same gear oil about 20,000 miles ago and haven't had a problem http://www.valvoline.com/pdf/SynPower_Gear_Oils.pdf "Valvoline SynPower Gear Oil is recommended for use in axle applications requiring factory-fill or drain-and-fill levels of limited slip performance. Valvoline SynPower 75W-140 is also recommended for use where Ford M2C-192A, GM 12346140, Chrysler MS-8985 , or GL-5 SAE 75W-140 gear oil is specified. The addition of a supplemental friction modifier(Ford M2C-118-A, Chrysler MS-5630, or GM 1052358) is not required"  

I'm sure it wasn't the oil, not sure about the additive or it just could have been a fluke and the rear end was going out in the first place. But like I mentioned above I had no metal shavings when I first opened it up and started getting them after the change, the level of fluid was checked twice upon filling.  

bigballrz said: the level of fluid was checked twice upon filling. Click to expand...

yep its full when it starts running back out fill hole, make sure truck is on level ground though  

I could be wrong but I don't think you should have added any friction modifier to the Valvoline synthetic, it already has it in there. And on the Ford synthetic, I thought it was one bottle of modifier, not two??? I just did mine and only added one bottle, hope it's right.  

Actually I don't think you can put too much in. Anyway I got the truck back today and everything is smooth again. The guy the did the rear end for me showed.d me the parts, bearings were pitted pretty good which tells me that the damage was probably happening to them before the fluid change, pinion bearing casing was worn and like I said up top the spacers were worn pretty bad which was probably due to the modifier in my opinion but obviously I have no room to be making suggestions here. When the clutches and spacers came from Ford they came with 3 bottles of modifier? Could've been a fluke I guess but it sure seemed coincidental.  

Thats funny. I am experiencing the exact same problem after swapping to Valvoline Synthetic fluid.  

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Find a manual, 1997-2003 ford f-150 truck/expedition routine maintenance faq, you are here.

The Ford F-150, F-250, Expedition and Lincoln Navigator are all tough. After all, that's why you bought one. But they still need fluid changes, checks, and adjustments if they're to run and reliably and smoothly as you'd like. What follows is our quick reference guide for the 10th generation 1997-2003 Ford F-150 pickup truck, F-150 based light duty 1997-1998 Ford F-250 (non-Super Duty), and 1997-2006 Ford Expedition and Lincoln Navigator.

Most of these recommended routine maintenance tasks you can do yourself at home for practically no money, with just a few tools and a little time. If you need guidance, or step by step instructions, check out our  OnDemand video tutorials , or get the  online manual , or our  traditional printed manual .

Engine Oil Type                                            5W-30 (1997-99)                                                                      5W-20 (2000-newer) Engine Oil Capacity                                     6.0 quarts (1997-2004)                                                                      7.0 quarts (2005-newer) Oil Drain Plug Torque                                  96-144 in-lbs(1997-2006)

Transmission Fluid Change

Transmission Fluid Type                             Mercon ATF(E4OD, 4R100, manual)                                                                      Mercon V ATF (4R70W, 4R70E, 4R75E)                                                                      Mercon SP STF (6HP26, 6R75)                                                                      Mercon LV ATF (6R80) Transmission Fluid Capacity                      6-7.5 quarts (E4OD, 4R100) (with filter/fluid change)                                4.5-5 quarts (4R70W, 4R70E, 4R75E)                                                                      5 quarts (6HP26)                                                                      about 7 quarts (6R75, 6R80) Transmission Fluid Capacity                      15.9/16.4 quarts (E4OD 2WD/4WD) (total including converter)                            13.9 quarts (4R70W, 4R70E, 4R75E)                                                                      17.1/17.7 quarts (4R100 F150 2WD/4WD)                                                                      15.9/16.4 quarts (4R100 Expedition/Navigator 2WD/4WD                                                                      9.5 quarts (6HP26)                                                                      11 quarts (6R75)                                                                      13.0 quarts (6R80)                                                                      3.75 quarts (manual) Transmission Drain Plug Torque                18 ft-lbs (4R100)                                                                      71 in-lbs (6HP26)                                                                      30-43 ft-lbs (manual) Transmission Check/Fill Plug Torque        26 ft-lbs (E4OD, 4R70W, 4R100)

Transmission Pan Bolts Torque                 108-132 in-lbs

Torque Converter Drain Plug Torque         22 ft-lbs (E4OD, 4R70W)                                                                      19 ft-lbs (4R100)

Transfer Case Fluid Change

Transfer Case Fluid Type                            Mercon ATF (1997-2006)                                                             Transfer Case Capacity                               2.0 pints (1997-2006))                                                             Transfer Case Drain Plug Torque               80-203 in-lbs (1997-2002)                                                                      132 in-lbs (2003-up)

Differential Oil Change

Differential Oil Type                                     75W-90 GL-5 gear oil (front 1997-2006)                                                                      75W-140 GL-5 synthetic gear oil (rear 1997-2006)                                                                      -plus 4 oz Ford XL-3 friction modifier (8.8" and 9.75" axles)                                                                      -plus 8 oz Ford XL-3 friction modifier (10.25" axle) Differential Oil Capacity                              3.6 pints (front)                                                                       5.5-6.9 pints (F-150)                                                                       7.8 pints (F-250)                                                                       5.7 pints (1997-2003 Expedition/Navigator)                                                                       4.5 pints (2004-up Expedition/Navigator) Differential Drain Plug Torque                    15-22 ft-lbs (front)                                                                      15-30 ft-lbs (rear) Differential Cover Bolts Torque                  20-27 ft-lbs (front)                                                                       28-38 ft-lbs (1997-2002 rear)                                                                       24 ft-lbs (2003-up rear)

Cooling System Flush and Fill

Coolant Type                                                Motorcraft Premium (green) or Premium Gold (yellow) coolant                                                                       mixed 50/50 with water (match color already installed)             Cooling System Capacity                            15.7-20.1 quarts (V6 F-150)                                                                       17.9-23.9 quarts (1997-2003 V8)                                                                       18.0-20.8 quarts (2004-2006 V8)                                                         

Other Miscellaneous Fluid Types

Power Steering Fluid                                   Mercon auto transmission fluid (1997-2005)                                                                       Mercon V auto transmission fluid (2006-later) Brake Fluid                                                   DOT 3 brake fluid Clutch Fluid                                                  DOT 3 brake fluid

Other Miscellaneous Torque Specs

Wheel Lug Nuts                                           100 ft-lbs (12mm wheel studs)                                                                      150 ft-lbs (14mm wheel studs) Brake Caliper Bolts                                      21-26 ft-lbs (1997-2002 front) (front)                                                             21-26 ft-lbs (2003 F-150 and F-250 front)                                                                       41 ft-lbs (2003-2006 Expedition/Navigator front) (rear)                                                              20 ft-lbs (1997-2002 rear)                                                                       20 ft-lbs (2003 F-150 and F-250 rear)                                                                       26 ft-lbs (2003-2006 Expedition/Navigator rear)                                                              Caliper Bracket Bolts                                   136 ft-lbs (1997-2002 front) (front)                                                             136 ft-lbs (2003 F-150 and F-250 front)                                                                       148 ft-lbs (2003-2006 Expedition/Navigator front) (rear)                                                              80 ft-lbs (1997-2003 F-150 and F-250 rear)                                                                       70 ft-lbs (1997 Expedition/Navigator rear)                                                                       40 ft-lbs (1998-2002 Expedition/Navigator rear)                                                                       140 ft-lbs (2003-2006 Expedition/Navigator rear)

Maintenance Schedule

The following intervals are based on the assumption that you will be doing the service work yourself, as opposed to paying to have the work done. These are our recommended minimum maintenance intervals for vehicles that are driven daily, and in many cases are shorter than the factory’s recommendations. Because frequent maintenance enhances the efficiency, performance and resale value of your car, we encourage you to follow our schedule. If you drive in dusty areas, tow a trailer, idle or drive at low speeds for extended periods, or drive for short periods (less than four miles at a time) in below freezing temperatures, even smaller intervals are recommended.

When the vehicle is new, follow the maintenance schedule to the letter, record it in your owner’s manual and keep all receipts to protect the warranty and resale value. In many cases the initial maintenance check is done by the dealer at no cost (check with the service department when you buy the truck for more information). 

Every 250 miles or weekly

• Check the engine oil level
• Check the coolant level
• Check the windshield washer fluid level
• Check the brake and clutch fluid levels
• Check the tires and tire pressures

Every 3,000 miles or 3 months ...all items listed above, as well as

• Change engine oil and filter
• Check the power steering fluid level
• Check the automatic transmission fluid level
• Lubricate the chassis

Every 6,000 miles or 6 months ...all items listed above, as well as

• Rotate the tires
• Inspect/replace the windshield wiper blades
• Inspect exhaust system
• Check and service the battery
• Check the seat belts

Every 15,000 miles or 12 months ...all items listed above, as well as

• Replace fuel filter
• Replace air filter*
• Inspect all underhood hoses
• Inspect engine accessory drive belt
• Inspect cooling system
• Inspect steering and suspension
• Inspect the brakes
• Check fuel system
• Check the differential oil level in the front (4x4) and rear
• Check the transfer case oil level (4x4)
• Check manual transmission fluid level

Every 30,000 miles or 30 months ...all items listed above, as well as

• Inspect/repack front wheel bearings (2WD)
• Flush and refill cooling system
• Change the brake fluid
• Change the automatic transmission fluid and filter**
• Check the steering, suspension and drive axle boots
• Inspect evaporative emissions control system

Every 60,000 miles or 48 months ...all items listed above, as well as

• Check the PCV valve
• Replace the spark plugs
• Inspect/replace the spark plug wires
• Change the differential oil
• Change transfer case fluid
• Change manual transmission fluid

* Replace more often if the vehicle is driven in dusty areas.

** If the vehicle is operated in continuous stop-and-go traffic or mountainous areas, change at 15,000 miles.

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Rear Diff fluid change questions

• Thread starter Vankonk
• Start date Apr 12, 2018

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• Apr 12, 2018

New to the forum and new to my used 2016 Expy EL Limited. Bought it used with 60,000 miles in Dec 2017. About a month ago I noticed a hum in the rear end at low speed turns. It has steadily grown over the past month into a vibration that can than be felt and heard. Before I bring it in, I thought I would change out the read diff fluid since I have done some research on the forums. I crawled underneath and found the info on the rear diff is 3L73 - 9.75. I see the drain plug and fill plug. I purchased the recommended Motorcraft gear oil and 4oz of friction modifier. My question - is this a quick dump and fill? It seems easy enough but thought I would ask for any experience or pointers before I mess something up. Thanks.  

Full Access Members

Yes it is a quick dump and fill. Well not exactly quick since gear oil is quite thick, Though I would use Amsoil instead of Motorcraft. I have found it to be superior. It is all I use in transmission, differentials, and transfer cases anymore. Motor oil I have not noticed a difference but I also refuse to go past 5k for any oil change so good old Motorcraft is all I really need. I do differentials and transfer cases at 50k because gear oil is cheap. Transmissions at 75k. Are you running auto 4x4???? My old Explorer would do this when tread depths were substantially different for the front and rear. Even with fresh fluid. New tires solved the issue.  

• Apr 13, 2018

It stays in 2H all the time unless I need 4auto for snow. I did drain it last night and I think the previous owner or dealership either used the wrong fluid or it was severely broken down. It ran out like water. I was expecting it to pour out but not like that. It was empty in a matter of seconds. It was dark and there was no signs of water contamination, just very runny. Also when I pulled the fill plug up top, fluid started to leak out of the fill. One other observation, was both the fill plug and drain plug had some type of grease covering the magnets. Not sure if that was normal or not. So a couple of strange things. Changing the fluid fixed the problem. No more shutter/vibrations in slow turns. I ended up using Mobil1 75W90 full syn with the friction modifier. I know that's not the recommended oil so I might get some amsoil and do it again. Like you said it doesn't take long and not that expensive. I didn't even need to jack up the truck to do it.  

Glad fluid fixed the issue. Sounds like they did not add friction modifier either. I just hit 47k so I’ll be doing my differentials and transfer case at the end of the summer. Which will be good just in time for winter when my 4wd gets used most.  

My 17 model with 16k miles on it does it only when it’s cold. My 2012 ctsv does it only when it’s cold. It’s just a part of having an LSD rear. With that said that doesn’t mean all of them do it. The clutches are grabby when the fluid is cold and that’s why the hum around slow turns. After a mile or two of driving it shouldn’t do it anymore because the fluid heats up. A fluid change will remedy it but chances are the noise will return especially when it’s cold out. Nothing to worry about  

• Apr 14, 2018

1997SCEBFEX

++ on glad you resolved the problem. cheap insurance imho.  

07xln said: My 17 model with 16k miles on it does it only when it’s cold. My 2012 ctsv does it only when it’s cold. It’s just a part of having an LSD rear. With that said that doesn’t mean all of them do it. The clutches are grabby when the fluid is cold and that’s why the hum around slow turns. After a mile or two of driving it shouldn’t do it anymore because the fluid heats up. A fluid change will remedy it but chances are the noise will return especially when it’s cold out. Nothing to worry about Click to expand...

• Apr 15, 2018

Trainmaster

Old school member.

chuck s said: Don't forget to remove the fill plug before the drain plug. Click to expand...

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However, up to now, the main carriers of catalytic additives have been mineral sorbents: silica gels, alumogels. This is obviously due to the fact that they consist of pure homogeneous components SiO2 and Al2O3, respectively. It is generally known that impurities, especially the ash elements, are catalytic poisons that reduce the effectiveness of the catalyst. Therefore, carbon sorbents with 5-15% by weight of ash elements in their composition are not used in the above mentioned technologies. However, in such an important field as a gas-mask technique, carbon sorbents (active carbons) are carriers of catalytic additives, providing effective protection of a person against any types of potent poisonous substances (PPS). In ESPE “JSC "Neorganika" there has been developed the technology of unique ashless spherical carbon carrier-catalysts by the method of liquid forming of furfural copolymers with subsequent gas-vapor activation, brand PAC. Active carbons PAC have 100% qualitative characteristics of the three main properties of carbon sorbents: strength - 100%, the proportion of sorbing pores in the pore space – 100%, purity - 100% (ash content is close to zero). A particularly outstanding feature of active PAC carbons is their uniquely high mechanical compressive strength of 740 ± 40 MPa, which is 3-7 times larger than that of  such materials as granite, quartzite, electric coal, and is comparable to the value for cast iron - 400-1000 MPa. This allows the PAC to operate under severe conditions in moving and fluidized beds.  Obviously, it is time to actively develop catalysts based on PAC sorbents for oil refining, petrochemicals, gas processing and various technologies of organic synthesis.

Victor M. Mukhin was born in 1946 in the town of Orsk, Russia. In 1970 he graduated the Technological Institute in Leningrad. Victor M. Mukhin was directed to work to the scientific-industrial organization "Neorganika" (Elektrostal, Moscow region) where he is working during 47 years, at present as the head of the laboratory of carbon sorbents.     Victor M. Mukhin defended a Ph. D. thesis and a doctoral thesis at the Mendeleev University of Chemical Technology of Russia (in 1979 and 1997 accordingly). Professor of Mendeleev University of Chemical Technology of Russia. Scientific interests: production, investigation and application of active carbons, technological and ecological carbon-adsorptive processes, environmental protection, production of ecologically clean food.   

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The CFR600 nuclear reactor is being constructed in Xiapu, China. Image courtesy of China National Nuclear Corporation.

The TEVEL Fuel Company of Rosatom will supply nuclear fuel for the CFR600 nuclear reactor.

CFR-600 prototype reactor project background

Cfr-600 reactor technology, safety features of the cfr-600, fuel supply for the cfr-600.

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Rosatom Starts Life Tests of Third-Generation VVER-440 Nuclear Fuel

• 16 June, 2020 / 13:00

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