Fluid weight difference - Owner's Manual vs. Motorcraft - Ford F150 Forum - Community of Ford Truck Fans



1987 - 1996 F150 Still running strong! Talk about your 8th and 9th generation Ford F150 trucks.

Fluid weight difference - Owner's Manual vs. Motorcraft

Reply
 
 
 
Thread Tools Search this Thread
Old 05-12-2014, 05:28 PM   #1
Senior Member
Thread Starter
 
ScaldedApe's Avatar
 
Join Date: May 2008
Location: Texas Border
Posts: 414
Thanked 23 Times in 19 Posts
Default Fluid weight difference - Owner's Manual vs. Motorcraft

So I'm trying to order differential fluid for both the front and rear diff and I'm getting two different numbers. My owner's manual says to use 80w-90 front and rear and motorcraft.com says to use the following:

"Part Description: (Motor Oils And Lubricants Usa Usage); Hypoid gear lubricant - ""Use 75W140 synthetic oil ONLY'' "

I know this subject gets beat to death, but I wonder why the difference in weights? Did Ford come to some new understanding?
ScaldedApe is offline   Reply With Quote
Old 05-12-2014, 08:14 PM   #2
We'd do it
iTrader: (1)
 
Just call me Sean's Avatar
 
Join Date: May 2008
Location: Orlando,Fl.
Posts: 32,657
Thanked 427 Times in 383 Posts
Default

They didn't use synthetics when our trucks were new.
Just call me Sean is offline   Reply With Quote
Old 05-12-2014, 08:36 PM   #3
Senior Member
Thread Starter
 
ScaldedApe's Avatar
 
Join Date: May 2008
Location: Texas Border
Posts: 414
Thanked 23 Times in 19 Posts
Default

Quote:
Originally Posted by Just call me Sean View Post
They didn't use synthetics when our trucks were new.
So does Ford now recommend this new weight and synthetic? Front and rear?
ScaldedApe is offline   Reply With Quote
Old 05-12-2014, 11:18 PM   #4
It's a Canadian thing eh!
 
sylver91's Avatar
 
Join Date: Nov 2010
Location: Ontario, living across a hay field
Posts: 6,662
Thanked 186 Times in 181 Posts
Default

As far as I knew only Lightning trucks recommended 75W-140 GL5. Everything else is 80w-90 with or without 4 oz of trac modifier If you have an LS.
sylver91 is offline   Reply With Quote
Old 05-13-2014, 01:45 AM   #5
Senior Member
Thread Starter
 
ScaldedApe's Avatar
 
Join Date: May 2008
Location: Texas Border
Posts: 414
Thanked 23 Times in 19 Posts
Default

I looked at the motorcraft part number notes and it looks like at one point it had been replaced by 75w-90. But all the numbers are discontinued.

I may just stick with synth 75w-90 since it's closet to the manual.
ScaldedApe is offline   Reply With Quote
Old 05-13-2014, 03:23 PM   #6
Senior Member
 
Join Date: Oct 2010
Location: Charlotte, NC
Posts: 2,452
Thanked 160 Times in 136 Posts
Default

Quote:
Originally Posted by ScaldedApe View Post
I looked at the motorcraft part number notes and it looks like at one point it had been replaced by 75w-90. But all the numbers are discontinued.

I may just stick with synth 75w-90 since it's closet to the manual.
I use 75w-90 with no issues.
qdeezie is online now   Reply With Quote
Old 05-20-2014, 10:56 PM   #7
Senior Member
 
Flareside302's Avatar
 
Join Date: Jan 2013
Location: La Vergne, TN
Posts: 441
Thanked 20 Times in 20 Posts
Default

lightning's were 75w140 all others were 80w90. but 75w90 is a great alternative.
Flareside302 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Did a Tune Up WOW! LEBScrew13 2009 - 2014 Ford F150 24 11-15-2017 12:32 PM
Icon Rear Shocks thatdudethere 2015 - Present Ford F150 10 08-25-2016 05:20 PM
'96 side manual mirrors with bolts under bracket Brandyn193 Exterior 12 04-26-2016 03:49 PM
2015 or Wait for 2016 blackout44 General F150 Discussion 17 02-28-2016 03:45 AM
Hey everyone Brandyn193 Introductions 1 09-04-2015 05:06 PM


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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:17 AM.


Copyright 2006 - 2017 F150Forum.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: