Help ID Rear Diff Tag for Fluids
Thread Starter
|
More Turbo
Joined: Dec 2015
Posts: 500
Likes: 38
From: Pacific Northwest
Help ID Rear Diff Tag for Fluids
Need some help identifying my rear diff for changing out fluids.
On a 2003 F-250 4x4 4 door, long Bed.
Rear Diff tag says
V 414 F
S 10 5 5618
Also a anyone have any recommendations for a nothing fancy, good priced rear cover replacement?
Thanks in advance!!
On a 2003 F-250 4x4 4 door, long Bed.
Rear Diff tag says
V 414 F
S 10 5 5618
Also a anyone have any recommendations for a nothing fancy, good priced rear cover replacement?
Thanks in advance!!
Elder User
Joined: Mar 2007
Posts: 695
Likes: 4
There are two tags on these rear ends. One is the one you gave us (kind of) and there is also a fluid tag that should tell you the diff needs 75w140 synthetic fluid.
On the other tag, there should be a code that gives you the axle ratio as well as if it is a limited slip. For example, if it were a 3.73 ratio with a limited slip, the tag would read 3 L 73. Look at the tag you have again to confirm.
If it has a limited slip, you will also have to add friction modifier. Even if the fluid you use says it has it in it, I would add a little more as the fluids tend to be light on the modifier.
As for a cover, look for an aluminum finned cover off a 2008. You will need longer bolts to make it work but the cover can be had off ebay for around $50.
On the other tag, there should be a code that gives you the axle ratio as well as if it is a limited slip. For example, if it were a 3.73 ratio with a limited slip, the tag would read 3 L 73. Look at the tag you have again to confirm.
If it has a limited slip, you will also have to add friction modifier. Even if the fluid you use says it has it in it, I would add a little more as the fluids tend to be light on the modifier.
As for a cover, look for an aluminum finned cover off a 2008. You will need longer bolts to make it work but the cover can be had off ebay for around $50.
Laughing Gas
Joined: Jan 2007
Posts: 870
Likes: 9
From: Carbondale, CO
Hope this helps with the cover and procedure. I used this cover and the Mobile with no additional friction modifier on my 02.
https://www.ford-trucks.com/forums/8...with-pics.html
https://www.ford-trucks.com/forums/8...with-pics.html
Thread Starter
|
More Turbo
Joined: Dec 2015
Posts: 500
Likes: 38
From: Pacific Northwest
Awesome thank you guys for the help!
I did see that other tag and it says W 140 synthetic only.
So 75-140.
I also found that my door tag has axle code 31, I'm pretty sure is a Dana rear end.
So for a cover is their more than one Dana model for a cover?
Edit: It's a Dana 10.5 after seeing 10 5 on my diff tag.
Off to eBay to purchase a cover!
I did see that other tag and it says W 140 synthetic only.
So 75-140.
I also found that my door tag has axle code 31, I'm pretty sure is a Dana rear end.
So for a cover is their more than one Dana model for a cover?
Edit: It's a Dana 10.5 after seeing 10 5 on my diff tag.
Off to eBay to purchase a cover!
Elder User
Joined: Mar 2007
Posts: 695
Likes: 4
Awesome thank you guys for the help!
I did see that other tag and it says W 140 synthetic only.
So 75-140.
I also found that my door tag has axle code 31, I'm pretty sure is a Dana rear end.
So for a cover is their more than one Dana model for a cover?
Edit: It's a Dana 10.5 after seeing 10 5 on my diff tag.
Off to eBay to purchase a cover!
I did see that other tag and it says W 140 synthetic only.
So 75-140.
I also found that my door tag has axle code 31, I'm pretty sure is a Dana rear end.
So for a cover is their more than one Dana model for a cover?
Edit: It's a Dana 10.5 after seeing 10 5 on my diff tag.
Off to eBay to purchase a cover!
Usually SRW F-350's are the ones with Sterling 10.5 rears and the f-250's get a Sterling 10.25 rear.
Thread Starter
|
More Turbo
Joined: Dec 2015
Posts: 500
Likes: 38
From: Pacific Northwest
Gonna go check my local Napa tomorrow for a cheaper synthetic alternative. I don't even think mobile 1 would be that much. Granted O'Reillys isn't the best place to buy fluids.
Trending Topics
Thread Starter
|
More Turbo
Joined: Dec 2015
Posts: 500
Likes: 38
From: Pacific Northwest
I'm not saying your wrong at all, how did you come to that conclusion? Are you saying the door sticker axle code 31 is always for the front axle? Thanks
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,679
From: Stephensville WI
Help ID Rear Diff Tag for Fluids
Your rear axle is a Sterling 10.5, not a 10.25. The front is a Dana 60.
Are you sure your code isn't 37 or 3L?
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
Are you sure your code isn't 37 or 3L?
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
Senior User
Joined: Jun 2012
Posts: 489
Likes: 0
From: Plant City, FL
Originally Posted by reptar0077
I would but in my "smaller" town O'Reillys auto parts wants 20$ per bottle! That's a lot!
Gonna go check my local Napa tomorrow for a cheaper synthetic alternative. I don't even think mobile 1 would be that much. Granted O'Reillys isn't the best place to buy fluids.
Gonna go check my local Napa tomorrow for a cheaper synthetic alternative. I don't even think mobile 1 would be that much. Granted O'Reillys isn't the best place to buy fluids.
Thread
Thread Starter
Forum
Replies
Last Post
mattnj
1987 - 1996 F150 & Larger F-Series Trucks
11
Sep 23, 2018 03:38 PM
metalmechanix
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
16
Jan 4, 2005 12:56 PM
dalton
Clutch, Transmission, Differential, Axle & Transfer Case
3
Sep 18, 2003 08:39 AM