Differential fluid - Ford Truck Enthusiasts Forums



1999 to 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines SPONSORED BY:
Advertisement

Differential fluid

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-18-2011, 03:12 PM
jc8825's Avatar
jc8825 jc8825 is offline
Posting Guru
Thread Starter
 
Join Date: Jul 2010
Location: Fort Worth
Posts: 1,711
jc8825 is gaining momentum as a positive member of FTE.jc8825 is gaining momentum as a positive member of FTE.
Differential fluid

Anyone here follow the recommended service and never change the rear differential fluid? The front calls for service every 150K, but the rear is "lubricated for life". I have done the front, but I didn't know if I should do the rear. I had it checked a while back and was told the fluid looked good.
Reply With Quote
  #2  
Old 06-18-2011, 05:08 PM
Kajtek1's Avatar
Kajtek1 Kajtek1 is offline
Postmaster
 
Join Date: Apr 2006
Location: CA Bay Area
Posts: 3,524
Kajtek1 has a very good reputation on FTE.Kajtek1 has a very good reputation on FTE.Kajtek1 has a very good reputation on FTE.
Where did you find those recommendations? I found info about my Dana 80 to have the oil changed every 30k.
I rebuild my differential a year ago and changed the oil after 10k as the plug magnet had lot of steel "dust" on it.
That said my Mercedes has 220,000 miles on it and I have no records the differential was ever serviced. I am not planning to do so for the next 300,000. Only checked the oil level some time ago as it shows some oil sweating.
Reply With Quote
  #3  
Old 06-18-2011, 05:43 PM
jc8825's Avatar
jc8825 jc8825 is offline
Posting Guru
Thread Starter
 
Join Date: Jul 2010
Location: Fort Worth
Posts: 1,711
jc8825 is gaining momentum as a positive member of FTE.jc8825 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by Kajtek1 View Post
Where did you find those recommendations? I found info about my Dana 80 to have the oil changed every 30k.
Ford Scheduled Maintenance Guide. The F-450 (Dana 80) and F-550 (Dana 135) are excluded from this and are recommended to change rear axle lubricant between 50K-100K miles.

Reply With Quote
  #4  
Old 06-18-2011, 06:23 PM
Kajtek1's Avatar
Kajtek1 Kajtek1 is offline
Postmaster
 
Join Date: Apr 2006
Location: CA Bay Area
Posts: 3,524
Kajtek1 has a very good reputation on FTE.Kajtek1 has a very good reputation on FTE.Kajtek1 has a very good reputation on FTE.
Well... we had endless discussion on "lifetime transmission fluid" on Mercedes forum in section with cars made in 1995-2003. In that era average car life was less than 10 years. Now, while driving 15 years old cars the owners keep on asking "who's life we are talking about here?"
Mercedes on newer models changed the policy and advise fluid replacements.
Sure sounds like you opened another can of worms.
Good luck whenever it goes.
Oh, BTW years ago I took educational courses about oils. The main rule about oils always was "don't judge oils by their looks"
Reply With Quote
  #5  
Old 06-18-2011, 06:48 PM
F350-6's Avatar
F350-6 F350-6 is online now
Post Fiend
 
Join Date: Mar 2007
Location: Texas
Posts: 25,904
F350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputation
Change the fluid. Lifetime means until it needs a rebuild. It won't need a rebuild as soon if you change the fluid. Besides, if you've got a limited slip rear end you'll be amazed how much better the rear grabs when you put the proper amount of friction modifier in there instead of dumping in way too much like they do at the factory.
Reply With Quote
  #6  
Old 06-18-2011, 06:56 PM
bpounds's Avatar
bpounds bpounds is offline
2 bit Californian
 
Join Date: Aug 2006
Location: Whittier, CA
Posts: 16,284
bpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputation
I change every 50-60k on a truck. Cars don't matter so much.

As far as the schedule, I don't think anyone here should be looking at the Normal Service. Severe Service applies to almost everyone. If it doesn't, you probably shouldn't be driving a truck.

Here's what I did on my Superduty.
http://www.ford-trucks.com/forums/89...with-pics.html
Reply With Quote
  #7  
Old 06-19-2011, 04:41 PM
jc8825's Avatar
jc8825 jc8825 is offline
Posting Guru
Thread Starter
 
Join Date: Jul 2010
Location: Fort Worth
Posts: 1,711
jc8825 is gaining momentum as a positive member of FTE.jc8825 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by F350-6 View Post
Change the fluid. Lifetime means until it needs a rebuild. It won't need a rebuild as soon if you change the fluid. Besides, if you've got a limited slip rear end you'll be amazed how much better the rear grabs when you put the proper amount of friction modifier in there instead of dumping in way too much like they do at the factory.
Okay, now for the friction modifier. I plan to use Valvoline Synthetic 75-140 gear oil as per the manual, do I need to use Motorcraft friction modifier? How much? I have read in two different Ford publications, one said 4oz, the other said 8oz. Which is it?
Reply With Quote
  #8  
Old 06-19-2011, 04:54 PM
bpounds's Avatar
bpounds bpounds is offline
2 bit Californian
 
Join Date: Aug 2006
Location: Whittier, CA
Posts: 16,284
bpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputation
I suggest you choose a synthetic that has the modifier already in it. The Valvoline may, not sure. Mobil 1 and Royal Purple have it.
Reply With Quote
  #9  
Old 06-19-2011, 05:38 PM
F350-6's Avatar
F350-6 F350-6 is online now
Post Fiend
 
Join Date: Mar 2007
Location: Texas
Posts: 25,904
F350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputation
You can get the friction modifier from places like NAPA or Carquest too. Start out with 4 oz and take it for a test drive around a bunch of corners. If you're getting any chattering, add another ounce and test again until the chattering is gone. If you dump too much in there you don't have to worry about the chatter, but it also makes the LS about useless.
Reply With Quote
  #10  
Old 06-19-2011, 06:07 PM
A/Ox4's Avatar
A/Ox4 A/Ox4 is offline
9 ECHO 1
 
Join Date: Aug 2009
Location: Bakersfield, CA
Posts: 11,823
A/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputation
I just did mine yesterday. It also gave me a change to clean out the inside of the cover and I took them down and repainted them.
Reply With Quote
  #11  
Old 06-19-2011, 06:49 PM
jc8825's Avatar
jc8825 jc8825 is offline
Posting Guru
Thread Starter
 
Join Date: Jul 2010
Location: Fort Worth
Posts: 1,711
jc8825 is gaining momentum as a positive member of FTE.jc8825 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by TreySpooner65 View Post
I just did mine yesterday. It also gave me a change to clean out the inside of the cover and I took them down and repainted them.
I'm just going to empty and fill. I'm not going to be taking it apart.
Reply With Quote
  #12  
Old 06-19-2011, 06:52 PM
jc8825's Avatar
jc8825 jc8825 is offline
Posting Guru
Thread Starter
 
Join Date: Jul 2010
Location: Fort Worth
Posts: 1,711
jc8825 is gaining momentum as a positive member of FTE.jc8825 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by bpounds View Post
I suggest you choose a synthetic that has the modifier already in it. The Valvoline may, not sure. Mobil 1 and Royal Purple have it.
I can get the Valvoline for 11.99/qt and add the 4oz bottle of Motorcraft friction modifier for 6.99. The Mobil 1 and RP are both over $19/qt. No, thank you. I have NEVER used a Mobil 1 or RP product for that reason. If I am going to get into spending big bucks for fluid, I'll buy Amsoil, which I won't, I'm just sayin'...
Reply With Quote
  #13  
Old 06-19-2011, 06:57 PM
bpounds's Avatar
bpounds bpounds is offline
2 bit Californian
 
Join Date: Aug 2006
Location: Whittier, CA
Posts: 16,284
bpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputationbpounds has a superb reputation
Quote:
Originally Posted by jc8825 View Post
I can get the Valvoline for 11.99/qt and add the 4oz bottle of Motorcraft friction modifier for 6.99. The Mobil 1 and RP are both over $19/qt. No, thank you. I have NEVER used a Mobil 1 or RP product for that reason. If I am going to get into spending big bucks for fluid, I'll buy Amsoil, which I won't, I'm just sayin'...
Fine. Spent 20 seconds in Google to find that the Valvoline has the additive already, as I suggested that it might.
Valvoline.com > Products > Grease Gear Oil > Gear Oil > SynPower® Full Synthetic Gear Oil

Really wasn't hard to find.
Reply With Quote
  #14  
Old 06-19-2011, 06:59 PM
F350-6's Avatar
F350-6 F350-6 is online now
Post Fiend
 
Join Date: Mar 2007
Location: Texas
Posts: 25,904
F350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputation
How are you going to drain? Got a vacuum pump? Standard procedure is usually pull the cover, drain fluid, wipe things down a bit, new permatex, stick the cover back on and fill.
Reply With Quote
  #15  
Old 06-19-2011, 08:11 PM
SpringerPop's Avatar
SpringerPop SpringerPop is offline
Too old to be too smart..
 
Join Date: Jan 2002
Location: La La Land
Posts: 16,626
SpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputationSpringerPop has a superb reputation
Quote:
Originally Posted by jc8825 View Post
I'm just going to empty and fill. I'm not going to be taking it apart.
OK, but that's going to make things a bit more difficult, as there's no drain plug on these.

Pop
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rear Differential Fluid Change With Valvoline Synpower Texas Bob 1999 to 2016 Super Duty 1 06-17-2012 11:03 AM
Rear Differential Fluid Change With Valvoline Synpower Texas Bob 6.0L Power Stroke Diesel 2 06-16-2012 03:52 PM
2003 Rear Differential Fluid Type? daveplot Expedition & Navigator 11 06-27-2011 01:05 PM
Differential Fluid Change onuredneck707 6.0L Power Stroke Diesel 5 03-30-2011 06:09 PM
Differential fluids, what kind? Friction modifiers, yes/no? Vijay 1999 - 2003 7.3L Power Stroke Diesel 24 10-19-2009 02:54 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
2002, 2011, 250, bad, changed, diff, differential, duty, f250, f350, fluid, front, gear, oil, super

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 11:09 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.