Go Back   Ford Truck Enthusiasts Forums > Misc. > Oil & Lubrication
Sign in using an external account
Register Forgot Password?


Oil & Lubrication NO MLM Dealers, Wholesale Buyers Or Retailers allowed (except sponsors)
SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 05-30-2003, 10:31 AM
BigMattXXL's Avatar
BigMattXXL BigMattXXL is offline
Postmaster
 
Join Date: May 2002
Location: Annapolis, Maryland
Posts: 3,028
BigMattXXL is starting off with a positive reputation.
Question Expedition rear differential lube

I know I should've probably kept this one in my forum, but I wanted to bring to you guys. I just did the rear differential fluid in my 1999 Expedition. It calls for Ford synthetic 75w140 gear lube. I used that, but of course it's leaking now (there wasn't a gasket there to begin with, and I thought I did a good job of sealing it. Anyhow, I'm not too keen on buying another 3 qts. of this lube (it's like $25 a quart ) Anyhow, I just want to know if I absolutely have to use 75w140, or if I have a little bit of leeway. I'm thinking I'd rather go with Mobil 1 or Redline, but neither offer something to match the Ford stuff exactly. Any thoughts?

Thanks!

XXL
Reply With Quote
  #2 (permalink)  
Old 05-31-2003, 09:30 PM
MrBSS MrBSS is offline
Posting Guru
 
Join Date: May 2002
Location: Chicago Area
Posts: 1,673
MrBSS is starting off with a positive reputation.
Expedition rear differential lube

I wouldn't claim to be an expert in this area, but I do feel that the viscosity specification is probably important. It would seem that if it made little or no difference, it would be much easier for Ford to go with the more common grades.

I do believe, however, that Mobil 1 IS made in 75W140 viscosity, though you may not find it stocked much. Also, if you ask nice (or threaten to go elsewhere), you can usually get your Ford dealer to discount this kind of item. You can also try Fordpartsonline.com, although they might not be able to ship "hazardous" liquids like this.

Too bad about the leak. Do you think you refilled it maybe a little too soon? I'm putting an SVO cover/carrier support on mine and hope I don't have your problem.

Good luck!
Reply With Quote
  #3 (permalink)  
Old 05-31-2003, 10:25 PM
BlueOvalFitter's Avatar
BlueOvalFitter BlueOvalFitter is offline
Posting Guru
 
Join Date: Aug 2002
Location: Cajun Country
Posts: 1,973
BlueOvalFitter is gaining momentum as a positive member of FTE.
Expedition rear differential lube

I replaced my differential oil with Redline 80w140 full synthetic @ $8.00 a quart.Also used FelPro part # RDS 55341 differntial gasket.I dont trust just using RTV to seal the cover.
__________________
2007XL R/Cab,4.2 V6,auto,cruise control
The anticipation of death is worse then death itself!
Reply With Quote
  #4 (permalink)  
Old 05-31-2003, 11:50 PM
BigMattXXL's Avatar
BigMattXXL BigMattXXL is offline
Postmaster
 
Join Date: May 2002
Location: Annapolis, Maryland
Posts: 3,028
BigMattXXL is starting off with a positive reputation.
Expedition rear differential lube

Quote:
Originally posted by MrBSS

Too bad about the leak. Do you think you refilled it maybe a little too soon? I'm putting an SVO cover/carrier support on mine and hope I don't have your problem.

Good luck!
Yeah probably - I put the RTV on the diff cover, and let it sit for about 10-15mins, then stuck it back on there, torqued it down, and refilled. In retrospect, I should've let it sit until it started to skin over, then stuck it back on, gotten lunch, watched some TV, then refilled. All well - lessons learned.

As far as the viscosity goes - I'm not too concerned with the cold weight. Seeing as how the Ford stuff is 75w140 and the Redline is 80w140, it would appear that the Redline stuff will just be *slightly* thicker when it's cold out, even though the Ford stuff will easily hit the 80W mark within a mile or two down the road. In other words, since the end product is same, and the two weights are so close, I won't sweat it. Especially not in Maryland - it gets pretty hot, but not too terribly cold.

Thanks for the input, though!

XXL
Reply With Quote
  #5 (permalink)  
Old 05-31-2003, 11:58 PM
BigMattXXL's Avatar
BigMattXXL BigMattXXL is offline
Postmaster
 
Join Date: May 2002
Location: Annapolis, Maryland
Posts: 3,028
BigMattXXL is starting off with a positive reputation.
Arrow Expedition rear differential lube

So far, all I've found in 75w140 is Royal Purple and Amsoil. I think the Redline stuff is going to offer the best bang for the buck. Also, a friend told me about something called "The Right Stuff". Apparently it's the gasket sealant that's used for heavy duty trucks (like dump trucks, 18 wheelers, etc.) and it's ultra heavy duty.

Also, does anyone know what the drain interval is for the rear differential on my truck? My mom's 1998 Explorer manual says the rear lube never has to be changed - ever. I decided to change mine just because I bought the truck used, and I like to know what's going on. If the interval is kinda low, should I install one of those drain plug kits on the differential cover (providing I have clearance)?

XXL
Reply With Quote
  #6 (permalink)  
Old 06-01-2003, 12:08 AM
BlueOvalFitter's Avatar
BlueOvalFitter BlueOvalFitter is offline
Posting Guru
 
Join Date: Aug 2002
Location: Cajun Country
Posts: 1,973
BlueOvalFitter is gaining momentum as a positive member of FTE.
Expedition rear differential lube

Ford claims 100k mile change intervals;but they also say that about the plugs too,but we all know better! If you want just pull the fill plug and siphon it from there.Do you have the 8.8 differential? If so,use FelPro gasket #RDS 55341.
__________________
2007XL R/Cab,4.2 V6,auto,cruise control
The anticipation of death is worse then death itself!
Reply With Quote
  #7 (permalink)  
Old 06-01-2003, 09:51 PM
bronco351 bronco351 is offline
Posting Guru
 
Join Date: Sep 2002
Posts: 1,154
bronco351 is starting off with a positive reputation.
Expedition rear differential lube

Well, as far as changing the fluid. If you use your truck for heavy towing, or go off-road often, you want to change it once a year. If you do neither of those every 35,000 miles is good!!

Also, next time you change the fluid why don't you buy a gasket? They are only a few bucks. That RTV crap never works.

P.S. I beleive the expeditions have the 10.25 rear axles.
__________________
-1998 Ford P71, THIS CAR IS SCAREY FAST!!!

-2003 F-350 Dually, Crew Cab, Turbo Diesel, 4x4, BLACK!!!
Reply With Quote
  #8 (permalink)  
Old 06-01-2003, 11:40 PM
BigMattXXL's Avatar
BigMattXXL BigMattXXL is offline
Postmaster
 
Join Date: May 2002
Location: Annapolis, Maryland
Posts: 3,028
BigMattXXL is starting off with a positive reputation.
Expedition rear differential lube

Quote:
Originally posted by bronco351
Well, as far as changing the fluid. If you use your truck for heavy towing, or go off-road often, you want to change it once a year. If you do neither of those every 35,000 miles is good!!

Also, next time you change the fluid why don't you buy a gasket? They are only a few bucks. That RTV crap never works.

P.S. I beleive the expeditions have the 10.25 rear axles.
I don't do heavy towing, but I don't mind coughing up a few bucks now and then to save money in the long run. I didn't get a gasket because I had heard from numerous sources not to use one, and there wasn't a gasket when I took it off. I think it's the 8.8 LS axle, although I'm not sure - I remember seeing 8.8 somewhere on there. I'll double check

XXL
Reply With Quote
  #9 (permalink)  
Old 06-02-2003, 12:18 AM
bronco351 bronco351 is offline
Posting Guru
 
Join Date: Sep 2002
Posts: 1,154
bronco351 is starting off with a positive reputation.
Expedition rear differential lube

The reason there wasn't a gasket was because, it's cheaper for the factory just to put RTV. A gasket is always the best way to go in my opinion!!
__________________
-1998 Ford P71, THIS CAR IS SCAREY FAST!!!

-2003 F-350 Dually, Crew Cab, Turbo Diesel, 4x4, BLACK!!!
Reply With Quote
  #10 (permalink)  
Old 06-02-2003, 02:12 AM
BigMattXXL's Avatar
BigMattXXL BigMattXXL is offline
Postmaster
 
Join Date: May 2002
Location: Annapolis, Maryland
Posts: 3,028
BigMattXXL is starting off with a positive reputation.
Expedition rear differential lube

Quote:
Originally posted by bronco351
The reason there wasn't a gasket was because, it's cheaper for the factory just to put RTV. A gasket is always the best way to go in my opinion!!
Duly noted - I knew there had to be some sort of money-saving function for the FoMoCo

XXL
Reply With Quote
  #11 (permalink)  
Old 08-07-2007, 05:55 AM
jsw68 jsw68 is offline
New User
 
Join Date: Jan 2007
Posts: 21
jsw68 is starting off with a positive reputation.
I had the same problem...TWICE. I changed the rear diff on my supercrew to royal purple. Then after 4,000 miles it leaked. I changed it again, and after about 4,000 miles it's leaking again! I didnt use a gasket either time. Now i'm going to use a gasket. But do you need to put the gasket sealer on there too or do you just use the gasket?
Reply With Quote
  #12 (permalink)  
Old 08-07-2007, 10:50 AM
jimandmandy jimandmandy is offline
Post Fiend
 
Join Date: Jun 2001
Location: Running Springs CA
Posts: 5,228
jimandmandy has a great reputation on FTE.jimandmandy has a great reputation on FTE.jimandmandy has a great reputation on FTE.jimandmandy has a great reputation on FTE.jimandmandy has a great reputation on FTE.
75W-140 synthetic seems to have replaced 80W-90 dino as OE rear axle lube at Ford and GM, maybe Dodge also. The axles are identical, just that the syn is considered "lifetime".

The local PepBoys has both Mobil 1 and RP in 75W-140. The Mobil is much more expensive. I use Redline gear oils, not on price only, but also because it really does contain limited slip additive (also available without). When I tried the M1 gear oil, the LS unit chattered.

Jim
Reply With Quote
  #13 (permalink)  
Old 08-07-2007, 07:59 PM
aurgathor aurgathor is offline
Postmaster
 
Join Date: Aug 2004
Location: Bothell, WA
Posts: 2,886
aurgathor is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by jsw68
I had the same problem...TWICE. I changed the rear diff on my supercrew to royal purple. Then after 4,000 miles it leaked. I changed it again, and after about 4,000 miles it's leaking again! I didnt use a gasket either time. Now i'm going to use a gasket. But do you need to put the gasket sealer on there too or do you just use the gasket?
Normally, you use either the gasket (rubber) or the gasket sealer (RTV), but not both. For cork, you may use some brush on, or spray on sealers.

In any case, no matter what you do, you need to clean both surfaces. That's especially important with gaskets.

For whatever it worth, I used Ultra Blue RTV last time (30,000+ miles ago) and as far as I can see, there's not a drop of oil that leaked from the rear end.
Reply With Quote
  #14 (permalink)  
Old 08-07-2007, 08:21 PM
jsw68 jsw68 is offline
New User
 
Join Date: Jan 2007
Posts: 21
jsw68 is starting off with a positive reputation.
I looked all over for a gasket. I even called a dealer, they said that for 03 they only use the silicone. I used Ultra Black, it's the high temperature one. I just did it again tonight but i'm letting it set up over night before i put the lube in. I'll see if that makes a difference this time. On this tube it says to finger tighten the nuts until the sealant starts to come out the sides. Wait an hour and then tighten the bolts and additional 1/to 1/2 turn. So thats what i just did this time. This better work this time.
Reply With Quote
  #15 (permalink)  
Old 01-02-2009, 09:00 AM
Brandon_01's Avatar
Brandon_01 Brandon_01 is offline
Senior User
 
Join Date: Nov 2008
Location: Eastern South Carolina
Posts: 190
Brandon_01 is starting off with a positive reputation.
I am needing to change the oil in my rear end. The other night I checked out the rear end to see if I have a drain hole......well I don't. I have the limited slip, so I'm glad I have to take the cover off to drain it so I can make sure everything is ok inside.
__________________

01 Expedition 5.4L EB Wedgewood Blue
Towing w/ Limited Slip, 135K Miles

Psalm 13:5-6
Reply With Quote
Old 01-02-2009, 09:00 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Misc. > Oil & Lubrication

Tags
1998, change, diff, differential, end, expedition, fluid, ford, gear, lube, oil, p71, problems, rear, seal

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 07:21 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
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.

vbulletin Admin Backup