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Royal Purple or Redline 75/140 for the rear( no friction additive needed)
75/90 for the front, either dino or synthetic
Mobil 1 for the transfer case
It doesn't get any easier.....
You can find all of them at the local auto parts...
75/90 for the front, either dino or synthetic
Mobil 1 for the transfer case
It doesn't get any easier.....
You can find all of them at the local auto parts...
2001 F-350 CC 4x4 XLT PSD.,Pro Comp 6.5 suspension, 325/65/18 Nitto Terra Grapplers,18x10 Ultra Chrome Predator 8s, Trenz Grill,AMP Research Power Steps,X-Monitor,BD Pressure-Loc,SCMT,4 in MBRP Stainless exhaust,Tru-Cool Max,AFE Magnum Intake,Wicked Wheel,BRPV,203* stat,Western Diesel Turbo BrakeIII,Sonnax/Tri-springs,1400watt Pioneer/Polk Audio/Fosgate stereo, pre-pump & tank mods,ORU diff covers,acetoned badges,zoodad mod,heater core bypass,Friends of Oceano Dunes supporter, American Sand Association supporter. KEEP THE DUNES OPEN!!!!!
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Join Date: Jan 2003
Location: Eagle River, Alaska
Posts: 24,868
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Quote:
Originally Posted by SmokeyWren
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Kevin, read that again and you'll see it says "Do not use ... in transfer cases."
To me that means it's equivalent to Mercon, which was what Ford called for in my t-case as well as an automatic tranny for my year model.
I have a suspicion that Ford's "Transfer Case Fluid" may be the old Mercon, but that's just a guess. Maybe they rebottled their old Mercon stock and remarketed it.
Ford doesn't say why not to use Mercon V in t-cases. I can't see what would make a t-case self destruct with Mercon V in it, as there aren't any synchronizers, friction clutches or similar things like you'd find in an auto tranny, just gears, bearings, and a chain. 
I just put the question to Exxon Mobil thru their Mobil 1 website. We'll see what they say.
First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
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Yes Kevin, please let us know what they say. I have had Mobil 1 ATF in my transfer case now for two years.
2001 F-350 Crew Cab XLT PSD 4x4, Long Bed, 6-speed, 3.73, Manual Transfer, Power TTT Mirrors, 122k miles.
1989 Toyota 4x4 xtracab SR5 V6, Beat to heck with 200k+ miles and still running strong.
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Join Date: Jan 2003
Location: Eagle River, Alaska
Posts: 24,868
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Not a peep from Exxon Mobil yet. I'll be sure and post their response when and if it arrives.
First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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Ive been running the mobile syn ATF for 7 years in my T-case. No problems. I change it once a year.
2002 Excursion 7.3L 200K+, After market tranny cooler, diesel site transmission filter kit, coolant filter kit and complete boot kit, bilstein shocks. Original transmission with mobile syn ATF
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Quote:
Originally Posted by SmokeyWren
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Transfer case: 2 quarts Motorcraft Transfer Case Fluid.
Rear axle: 6.9 pints 75w140 synthetic. Pay attention: that's SYNTHETIC gear lube.
Front axle: Your Owner's Guide calls for 3.8 pints 75w90 synthetic axle lube. The latest workshop manual published in 2003 for 2000 Excursion says SAE 90 Premium Rear Axle Lubricant.
The current quick reference chart for differential lube used by Ford techs is at:
Motorcraft quick reference chart for axle lubes
Since the quick reference chart is current, it may be different than old printed manuals from several years ago. I can't read upside down, so I've learned to print out the chart and then I can read it.
Transfer case lube changed a few years ago. Your Owner's Guide says to use MERCON, but MERCON is no longer available, and you cannot use MERCON V. So you have to use the new stuff Ford developed specifically for transfer cases - Mortorcraft Transfer Case fluid:
http://www.fcsdchemicalsandlubricant...oduct=Transfer Case Fluid&category=Transmission Fluid
Rear axle: 6.9 pints 75w140 synthetic. Pay attention: that's SYNTHETIC gear lube.
Front axle: Your Owner's Guide calls for 3.8 pints 75w90 synthetic axle lube. The latest workshop manual published in 2003 for 2000 Excursion says SAE 90 Premium Rear Axle Lubricant.
The current quick reference chart for differential lube used by Ford techs is at:
Motorcraft quick reference chart for axle lubes
Since the quick reference chart is current, it may be different than old printed manuals from several years ago. I can't read upside down, so I've learned to print out the chart and then I can read it.
Transfer case lube changed a few years ago. Your Owner's Guide says to use MERCON, but MERCON is no longer available, and you cannot use MERCON V. So you have to use the new stuff Ford developed specifically for transfer cases - Mortorcraft Transfer Case fluid:
http://www.fcsdchemicalsandlubricant...oduct=Transfer Case Fluid&category=Transmission Fluid
Sorry to drag up an old post, the quick reference chart you linked shows my 02 F350 taking 75/90 synthetic rear axle lube, and my owners manual says it takes 75/90 premium 4 wheel drive lube. I just changed it with 80/90 rear axle lube, did I mess up?
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Brian, Tucson, Arizona
02 F350 4x4 CREW 7.3 170K, BFG Rugged Terrain 285s, AIS, Isspro pyro, boost & tranny temp pillar pod, Dipricol coolant temp, ELC, Isspro EV-2 Fuel Pressure & HPOP, Dieselsite boots, coolant & tranny filters & 203* Stat, 6.0 Tranny Cooler, ITP pre pump tank mod, Bellowed Up Pipes, Riffraff Frx, netbook mount with AE, GPR LED, Stancor, Red Head steering gear, Battery Tender & 2 Marincos.
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Quote:
Originally Posted by bigb
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I just changed it with 80/90 rear axle lube, did I mess up?
Last edited by SmokeyWren; 11-22-2010 at 08:23 PM.
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Yes, I see the chart says that. I am confused as to why the chart says synthetic but my owners manual says "Premium". They contradict each other.
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Brian, Tucson, Arizona
02 F350 4x4 CREW 7.3 170K, BFG Rugged Terrain 285s, AIS, Isspro pyro, boost & tranny temp pillar pod, Dipricol coolant temp, ELC, Isspro EV-2 Fuel Pressure & HPOP, Dieselsite boots, coolant & tranny filters & 203* Stat, 6.0 Tranny Cooler, ITP pre pump tank mod, Bellowed Up Pipes, Riffraff Frx, netbook mount with AE, GPR LED, Stancor, Red Head steering gear, Battery Tender & 2 Marincos.
Join Date: Apr 1999
Location: Midland County,TX, USA
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Quote:
Originally Posted by bigb
View Post
I am confused as to why the chart says synthetic but my owners manual says "Premium". They contradict each other.
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Just changed it to synthetic 75/90. Thanks for your input.
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Brian, Tucson, Arizona
02 F350 4x4 CREW 7.3 170K, BFG Rugged Terrain 285s, AIS, Isspro pyro, boost & tranny temp pillar pod, Dipricol coolant temp, ELC, Isspro EV-2 Fuel Pressure & HPOP, Dieselsite boots, coolant & tranny filters & 203* Stat, 6.0 Tranny Cooler, ITP pre pump tank mod, Bellowed Up Pipes, Riffraff Frx, netbook mount with AE, GPR LED, Stancor, Red Head steering gear, Battery Tender & 2 Marincos.
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Speaking of wrong fluids for diffs, I was wondering about some of mine. For the sake of simplicity ive been changing all of my diffs with synthetic 75w140. thats 1 D50, a sterling, and a ford 8.8 in a car. The 8.8 gets the snot beat out of it and also havent added any friction modifier (a little chatter, but I prefer a firmer grab of the clutches) and havent had any problems at all in any of my axles.
Do any of you guys foresee any problems or should I take this post to pirate to get flamed there?
Do any of you guys foresee any problems or should I take this post to pirate to get flamed there?
2000 F350 7.3l auto 4x4 CCLB Dually lariat, my new baby purchased 8-22-11
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Quote:
Originally Posted by SmokeyWren
View Post
Quote:
Originally Posted by bigb
View Post
I am confused as to why the chart says synthetic but my owners manual says "Premium". They contradict each other.[IMG class=inlineimg]https://www.thedieselstop.com/forums/images/smilies/read.gif[/IMG]
What's best for the transfer case?
Still synthetic atf.
Or just get the tcase stuff from ford.
Sent from my SM-G892A using Tapatalk
Or just get the tcase stuff from ford.
Sent from my SM-G892A using Tapatalk
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Join Date: Jan 2003
Location: Eagle River, Alaska
Posts: 24,868
My Photos: (180)
Feedback Score: 0 reviews
I just changed my tranny and t-case and used Mobil 1 Syn ATF (again). I'm at 215k miles, and run all winter with the hubs locked in, so my t-case gets abused a bit, turning all winter long whether in 4x4 or not, and it hasn't grenaded on me yet. I'm personally not worried about using a "non-approved" fluid.
But you could go by Ford's recommendation. They seem to change fluid specs as often as we change our underwear.
But you could go by Ford's recommendation. They seem to change fluid specs as often as we change our underwear.
First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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Thx...
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