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2013 F150 Rear diff and transfer case UOAs #4596666
12/06/17 10:48 PM
12/06/17 10:48 PM
Joined: May 2013
Posts: 1,124
upstate NY
dustyroads Offline OP
dustyroads  Offline OP
Joined: May 2013
Posts: 1,124
upstate NY
I'm always short on time, so condensing both units into one thread. I'm not sure, but I believe that the transfer case is probably the factory fill. The rear diff lube report looks too low on iron to be the factory fill, although it came out grey colored, which is what some others have reported when draining the factory fill on F150s. So.... shrug

Sorry, but uncertain of what we're looking at here. I bought the truck earlier this year with 81k miles and while it's in great condition, I don't know the service history.

Odometer read 91k miles when these samples were taken. I refilled the rear diff with M1 75W-140 and for the transfer case, I used Valvoline Transfer Case Fluid. The Valvoline TC fluid is said to cover Ford's XL-12, GM Auto Trak II and ATF+4 applications.

Cat SOS reports, tested by Milton Cat in Massachusetts.

Code:
Ford 9.75" rear diff                Borg Warner TC
3.55 with electronic locker         (electronic shift on the fly)
75W-140 (unknown brand, miles)      uncertain, but probably factory fill
Odometer 91k miles                  91k miles

Copper     1                        40
Iron       333                      603
Chromium   2                        1
Aluminum   1                        39
Lead       0                        2
Tin        1                        1
Silicon    22                       61
Sodium     2                        11
Potassium  4                        9
Boron      52                       25
Moly       1                        0
Nickel     25                       16
Silver     0                        0

Titanium   21                       1
Calcium    8                        84
Magnesium  1                        82
Zinc       14                       24
Phosphorus 1134                     82
Barium     0                        3

Oxidation  61%                      11
Nitration  4%                       4
Sulfation  64%                      19

Visc @ 100C  24.5                   5.2

PQI      59                         89

ISO       23/23/21                  22/20/16

4 micron   50248                    38039
6 micron   40489                    8495
10 micron  24638                    1064
14 micron  12816                    438
18 micron  4264                     212
21 micron  1444                     129
38 micron  382                      36
50 micron  287                      23











The transfer case wasn't full before I pulled the plug. I stuck my pinky finger in and could barely touch the fluid. After putting in 1.5 quarts (listed capacity), the new fluid was close to running out of the fill hole. This is my first time testing the TC fluid in any of my pickups, so I don't know if my results are as bad as I think, but "yikes!" is what comes to mind.

Guys and gals, check your factory fill fluids. Don't assume that they get it right when assembling a new vehicle. blush


2013 F150 XLT 5.0 4X4 104k miles
Edge 5W-30 / Fram 10575
Re: 2013 F150 Rear diff and transfer case UOAs [Re: dustyroads] #4596682
12/06/17 11:25 PM
12/06/17 11:25 PM
Joined: Apr 2013
Posts: 142
GTA, Canada / NYC
Emperors6 Offline
Emperors6  Offline
Joined: Apr 2013
Posts: 142
GTA, Canada / NYC
Nice. Why not a F350/F450? laugh

Re: 2013 F150 Rear diff and transfer case UOAs [Re: dustyroads] #4597020
12/07/17 10:32 AM
12/07/17 10:32 AM
Joined: Apr 2008
Posts: 12,999
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,999
Onondaga County
Low fluid causes a lot of transfer cases to spontaneously explode. Glad you checked it now, rather than it exploding down the road!


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: 2013 F150 Rear diff and transfer case UOAs [Re: Emperors6] #4597021
12/07/17 10:32 AM
12/07/17 10:32 AM
Joined: Oct 2014
Posts: 12,593
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,593
Idaho
Originally Posted By: Emperors6
Nice. Why not a F350/F450? laugh
D.R. cool gets to drive a semi. No need to compensate.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: 2013 F150 Rear diff and transfer case UOAs [Re: dustyroads] #4597389
12/07/17 06:23 PM
12/07/17 06:23 PM
Joined: Sep 2010
Posts: 7,594
Planet Earth
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
Planet Earth
I would say that the iron reading in the rear differential is too low for that to be the factory fill. I had 429 ppm after only 13,300 miles and though probably not identical driving conditions, I would guess that your reading should be in the neighborhood of 500 to 600 ppm after 81K miles.

Re: 2013 F150 Rear diff and transfer case UOAs [Re: 2015_PSD] #4598681
12/09/17 02:04 AM
12/09/17 02:04 AM
Joined: May 2013
Posts: 1,124
upstate NY
dustyroads Offline OP
dustyroads  Offline OP
Joined: May 2013
Posts: 1,124
upstate NY
Originally Posted By: Miller88
Low fluid causes a lot of transfer cases to spontaneously explode. Glad you checked it now, rather than it exploding down the road!


Well, I guess there was enough in there to prevent exploding, but between the low viscosity and low fluid level, it certainly isn't a pretty UOA. The iron sure is high for a part time case, I wonder if the previous owner used 4x4 a bunch, or just the result of the low fluid level. I used 4x4 last March in some pretty deep snow all worked well with no funny noises.

Originally Posted By: CT8
Originally Posted By: Emperors6
Nice. Why not a F350/F450? laugh
D.R. cool gets to drive a semi. No need to compensate.


I had to think about Emperors' comment. Maybe just a nod to the 75W140? If so, it's what Ford spec'd in my pickup. I understand that now they're using 75W-85 in the rear diffs.


Originally Posted By: 2015_PSD
I would say that the iron reading in the rear differential is too low for that to be the factory fill. I had 429 ppm after only 13,300 miles and though probably not identical driving conditions, I would guess that your reading should be in the neighborhood of 500 to 600 ppm after 81K miles.


I agree with you that the factory fill would probably have shown much more iron (based on your 2010 FX4), but I don't know. Unless there's some poor wear going on, I don't know why iron would be so high on a lube that had been changed along the way. I guess it could be just residual iron rinsing out on the first refill. Between the look of the fluid, and the fight that the cover gave me in removing it, I would have thought it was the first time draining. However, the "fuzz" on the plug wasn't as thick as I had expected, either. I dunno.... frown

Your transfer case UOAs looked fantastic on your 2010 FX4, mine is a little scary to look at. Hopefully, mine will go on to live a long life with proper care. I will consider switching to Amsoil in my TC next year, but I'm going to send in a sample of the Valvoline TC fluid for VOA and give it a workout this winter. I will see how it looks next spring.


2013 F150 XLT 5.0 4X4 104k miles
Edge 5W-30 / Fram 10575
Re: 2013 F150 Rear diff and transfer case UOAs [Re: dustyroads] #4599040
12/09/17 02:03 PM
12/09/17 02:03 PM
Joined: Apr 2013
Posts: 142
GTA, Canada / NYC
Emperors6 Offline
Emperors6  Offline
Joined: Apr 2013
Posts: 142
GTA, Canada / NYC
I was just asking about the F350/F450 due to the higher towing capacity. smile

Re: 2013 F150 Rear diff and transfer case UOAs [Re: Emperors6] #4599630
12/10/17 08:15 AM
12/10/17 08:15 AM
Joined: May 2013
Posts: 1,124
upstate NY
dustyroads Offline OP
dustyroads  Offline OP
Joined: May 2013
Posts: 1,124
upstate NY
Originally Posted By: Emperors6
I was just asking about the F350/F450 due to the higher towing capacity. smile


thumbsup That's fine. I'll tell you what came to mind...my friends saw the 75W-140 on the shelf in my garage, waiting to go in the rear diff. They (Chevy guys) laughed and said if I needed that heavy of lube, I should just get a heavier duty truck. Their trucks use 75W-90 so it seemed silly that I would be using the heavier grade. I've seen similar sentiment in some F-150 threads where guys wondered why Ford was using 75W-140. I thought maybe you were looking at it like that. smile


2013 F150 XLT 5.0 4X4 104k miles
Edge 5W-30 / Fram 10575
Re: 2013 F150 Rear diff and transfer case UOAs [Re: dustyroads] #4625352
01/05/18 08:01 PM
01/05/18 08:01 PM
Joined: Dec 2017
Posts: 3,044
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 3,044
SE British Columbia, Canada
One thing that Iíve found regarding OCIís is a lot of people regard rear diffís, front diffs and transfer cases as needing the same OCIís. After checking it out, I find transfer cases generally require more changes than diffs, especially if they have an auto setting with clutches inside the case.

An example would be that the front diff and rear diff are not even listed in the maintenance program for Chevy 1500 trucks within the first 150,000 miles but transfer cases require changes every 50,000 miles.

SF


If you want the job done right......do it yourself.
Re: 2013 F150 Rear diff and transfer case UOAs [Re: Snagglefoot] #4629451
01/09/18 04:12 PM
01/09/18 04:12 PM
Joined: May 2013
Posts: 1,124
upstate NY
dustyroads Offline OP
dustyroads  Offline OP
Joined: May 2013
Posts: 1,124
upstate NY
Originally Posted By: Snagglefoot
One thing that Iíve found regarding OCIís is a lot of people regard rear diffís, front diffs and transfer cases as needing the same OCIís. After checking it out, I find transfer cases generally require more changes than diffs, especially if they have an auto setting with clutches inside the case.




Agreed. Looking at my own reports above, the transfer case is sheared down to a low viscosity, and shows lots of iron. That's just a part time TC with no "auto" option. Maybe it was used extensively in 4x4, or maybe something is going to fail, but it definitely needed servicing. I think I will change the TC fluid again in the summer and go with a higher viscosity ATF, rather than the 5.9 cSt Valvoline fluid that I used.

For the folks not used to seeing particle counts, I should have put a > ahead of the micron sizes. It should show number of particles greater than 4 micron, 6 micron, etc. Cat doesn't show it on their report, and I was typing as fast as possible and left out the "greater than" symbols.


2013 F150 XLT 5.0 4X4 104k miles
Edge 5W-30 / Fram 10575

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