2015-2017 F150: Rear Differential Fluid Change

How to change the rear differential fluid on a 2015-2017 Ford F150. Rather than remove the rear differential cover to drain the fluid on this 2016 Ford F150, I elected to use a fluid extractor.
Removing the rear cover allows you to inspect general condition, backlash, etc., but if you don't have reason to suspect any problem, this method is pretty simple and straight-forward.
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Job Details:
Tools: 3/8 ratchet, fluid extractor, bucket (or bottle) pump
Parts: approx 3 qts Motorcraft 75w-85 Synthetic Gear Oil, brake/parts cleaner
Time: approx 30 minutes
Skill Level: Easy
CHAPTERS
0:00 Access
0:20 Fluid Extraction
1:42 Adding Fluid
2:07 Fluid Level Check
2:27 Cleanup

[@Reavely]

Awesome video ty

[@cessealbeach]

Just changed diff fluid on my dads 2014 3.5, this is for sure a better way to do it, the fluid was pretty pricey, but that's what's called in, Thanks next time,

[@phillipdale6765]

Thank you!

[@bayonne]

The TopSider is a great extractor. It will outlast any of the plastic models for sure.

[@macjaxjax2604]

Solid videos man! I think I’ve watched all your F-150 videos. Can you do a coolant flush? No one has a video for a coolant flush on Gen 2 eco boost engines!

[@MasterJacks]

Thanks! I've got a coolant flush in the plans, hopefully I'll get to it sooner than later. I'm a man of many projects :-)

[@keepitreal5148]

How many quarts for a 2017 f150 with traction control? Thanks

[@Polarbear5353]

No additive? Mine had the grinds multiple times, needed substantial amount of friction modifier added.

[@tsgarage2382]

Good video, I made an incorrect comment an Thamac15 called me out on it, good looking out mate.

[@Thamac15]

Friction modifier is only for limited slip differentials. This one in the video is electronic locking. You’re lame!

[@tsgarage2382]

@@Thamac15 lol yeah I was wrong, I saw a few vids back then an didn't know only the LS Diffs needed it. I will change my comment. Cheers

[@mikimiki195]

Do you have to use Ford fluid?

[@kenj.8897]

One hint , don't put pressure on top of can , it will collapse. Ask me how I know .No foot on top

[@tomcali494]

Hi Do you have link where I buy canister pump like your Thank you so much

[@MasterJacks]

I have the Amazon link to the pump I use on my website. Thanks for watching! www.masterjacks.com/2016-f150-trans-service

[@sacem52]

What 75w-90 would you use for the front & rear diff?

[@MasterJacks]

I would feel fine with any full synthetic in that weight.

[@sacem52]

MasterJacks does it matter if it’s a limited slip hypoid fluid like Valvoline Synpower 75w90?

[@MasterJacks]

@@sacem52 found this on the web "All differentials use gears, bearings and shims. Limited-slip differentials have additional clutch packs. Since there is nothing in any differential that is not in a limited-slip differential, there should be no harm in using a friction modifier in a non-limited-slip differential, although there is no need for it."

[@JoaquinSanchez-db9gk]

What gear oil would you recommend for a 2018 f150 with the electronic differential? I was thinking Amsoil or royal purple or even valvoline but all of them contain some friction modifier additive would it be ok?

[@MasterJacks]

Ford calls for Motorcraft 75W-85 Synthetic in all their 2018 rear diffs. Using an alternate brand with a similar protection range (with or without a friction modifier) is acceptable.The friction modifier helps keep limited-slip friction plates from sticking. It it doesn't have limited slip, it will have not effect. The electronic locking rear diff is not affected by having or not having a friction modifier.

[@JoaquinSanchez-db9gk]

@@MasterJacks thank you you're the best 🙏

[@Mike_Jones68]

@@JoaquinSanchez-db9gk do u remember what oil u used? Nearing same job soon

[@JoaquinSanchez-db9gk]

@@Mike_Jones68 yes I use amsoil, I highly recommended it

[@mbrick]

@@Mike_Jones68 Valvoline 75W-90 Synthetic "Flexfill" ... comes in a squeeze bag instead of a bottle, easy to squeeze in. Especially on the front diff.

[@steveyd101]

How bad is it to use 80w90 in the rear diff? My 16 f150 called for 80w90 in the front and 75w80 in the rear, but the mechanic put 80w90 in both. Wondering if it's a big deal and if I should take it back.

[@MasterJacks]

I'm sure the oil weight will be fine. Hopefully he put in a good synthetic that will hold up for a long time. The rear diff gets more heat and load abuse than the front diff. Conventional oil will be fine too, I'd just do a follow up service a little sooner than if it was synthetic (like 30k instead of maybe 60k)

[@steveyd101]

@@MasterJacks sorry. Meant to say 75w85 for the rear (not 75w80). It's not that much of a difference. I think it was a synthetic blend. I sort of treat synthetic like it's normal oil. Yeah the oil might not brake down as quick, but it's all the stuff floating around in it that will mess things up haha

[@jamesgo6517]

74-140 gear oil lucas works like butter..

[@markk3652]

Butter 🧈 isn’t a good gear lube tho.

[@ronsmith8434]

So I have an extractor... is it a good idea to do this or do I need to remove the cover to clear the magnet?? I dont pull anything.... I'm at 39000 miles with a rear wheel drive 3.5 standard engine

[@MasterJacks]

Pulling the rear cover allows you to check out the rear gears and to clean any settled grime that may have accumulated. At 39k, I don't think you'd see much wear.

[@MasterJacks]

Also, the magnet is built into the fill plug. They don't put one in the bottom as it can dislodge and take out bearings.

[@markk3652]

@@MasterJacks My Dodge Durango has a magnet epoxied in the sump to hold the debris. Pretty good idea, however I didn’t know it was there the first time I serviced the truck, and got a needle sharp piece of gear debris skewered into my fingertip while wiping out the oil left after cover removal.

[@MrLatex-fk9rj]

would it be okay to use 75w90 instead of the 75w85.

[@MasterJacks]

IMHO, yes that would be perfectly fine. If I wasn't making the video for KZbin, I probably would have used it too.

[@MrLatex-fk9rj]

@@MasterJacks awesome thanks for the fast reply.

[@cg9608]

Like the suction method, but how can you be sure you got all of it out?

[@Timothy2890]

Check the service manual to see how much it holds then pump it out and measure. As long as it you get the majority out you should be good.

[@cg9608]

@@Timothy2890 Ended up doing this myself by taking off the cover and re-sealing it. 2.5 Quarts removed, 2.5 added 👍.

[@bajamedic]

Is LS additive necessary on a '20 Raptor?

[@MasterJacks]

I'm not sure if the raptor has limited slip or not. Adding a friction modifier will not harm a standard differential, but it is necessary if it is limited slip. Short answer, if you put some in you're safe either way. If you bought the fluid from your dealer, they could decode your vin and let you know what you have.

[@okiedoak201]

If the Raptor has a L6 (elocker code is on the driver door label) then no modifier is needed....only a limited slip diff requires modifier

[@nadkram1]

If that was the first time the fluid was changed you should have removed the cover to clean all of the break-in fluid out... hope you don't get metal swimming around in there.

[@MasterJacks]

That's a valid consideration. I'm not sure if it was the first service, but likely it was.

[@gotcoolaid]

How do you do that?

[@Culb420]

kzbin.info/www/bejne/n4WQaoaNptOIg8k

[@jamesgo6517]

75-140 12 bolt fords ...lucas gear oil works great 👍

[@jamesgo6517]

dont let motorcraft rip you off

[@kenj.8897]

Yeah Amsoil , but wrong weight

[@jamesgo6517]

@@kenj.8897 theirs also a little bottle of anti friction additive your suppose to ad but most full synthetic wont need but if you frel it chattering add the additive its like 10$ from ford.

[@tomcali494]

Good morning Do you know how many thousand mile do I need to change I use oil gear Ford Thx so much

[@MasterJacks]

Probably around every 60k miles. More if towing often or a lot of city driving.

[@tomcali494]

@@MasterJacks Thx so much for help me

[@dontask8979]

The idea of pulling the cover is to inspect it. That's why there is no drain

[@ajamesc55]

and yet so many other vehicles have a drain

[@stevenc9207]

So what? Still doesn't mean a drain plug wouldn't be helpful or nice. Removing the cover to drain is dumb

[@markk3652]

@@stevenc9207 not dumb at all. There is a sump area at the very bottom of the housing that holds quite a bit of oil. This is where most of the debris from gear wear or lsd clutch wear will settle out. Pulling the cover allows for a better removal of this oil containing the debris, which gives a better resultant fluid change out. That debris cannot be removed from the vacuum method shown, this will cause accelerated bearing wear if left in place.

[@jfisher168]

No there’s no drain plug? It must be extracted?

[@MasterJacks]

Typically on a read diff, you pull the rear cover to drain it. Extractor is another option.

[@jfisher168]

@@MasterJacks I gotcha, I have a 2018 Durango and it’s got a fill plug and drain plug

[@MasterJacks]

@@jfisher168 it's nice when they do!

[@mvol5973]

How many miles should you do this?

[@MasterJacks]

Depends how much towing you're doing. Industry average is about every 30k.

[@robertd9850]

My 2016 F-150 manual says every 150,000 miles.

[@kevinanglin678]

@@robertd9850 Don't trust manufacturers change intervals transmission said 150,000 miles as well reason why it's so far is because that is when the extended warranty is done so it's on the consumer if they let it go that long and something breaks

[@attkdriver]

I did my first one at 60k. All regular driving no towing. If you’re towing id do it ever 30k.

[@gabeslawncare9104]

I thought you had to put friction modifier

[@MasterJacks]

If you have a limited-slip differential, yours might require a unique fluid or additive.

[@gabeslawncare9104]

@@MasterJacks I was talking to a Ford mechanic he told me I can use 75140 in my rear differential on my 17 f 150 instead of that other stuff I don't know man I thought about it

[@brianfinn7644]

I always wonder on mileage... my old Tundra is was 100k... I really dont know on Fords. It says 100k somewhere in my documents but I do not trust that...

[@MasterJacks]

Industry standard is around 30-60k, but it really depends on the extremes it's exposed to. Heavy towing or a lot of around town start/stop would have me lean towards or more frequent interval. For most users, 100k is probably fine, just nice to stay ahead of the game before grime starts taking out seals.

[@SA-bq1us]

My 2015 f150 calls for 75w140

[@9Packin]

My 2015 F150 says 75w85... both in the manual and on on the official Motorcraft fluid replacement chart.. hmm.

[@SA-bq1us]

@9Packin I took another look and yes, rear axle 75w140 and front axle 4x4 80w90 2015 ford f150 4x4 5.0 fx4

[@scottchristian5056]

There are better more professional videos on KZbin that shows you the correct way to do this job.

[@scottchristian5056]

Wow. What an aweful way to do it. Need to check and clean any metal shavings. Back yard mechanics are bad for real ones

[@blackericdenice]

This is not the right way to change the fluid. You didn’t clean off the magnet.

[@blackericdenice]

I just changed my 2016 F165 @ 89,000 miles. There was still some brown in the oil.

[@jamesgo6517]

74-140 gear oil lucas works like butter..