Rear Diff Cover ?
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
This is not true, my 2011 F350 SRW truck has a finned aluminum differential cover. I thought we covered this already... 
Senior User
Joined: Nov 2005
Posts: 290
Likes: 0
From: Albuquerque
Covers
How's this:
Some MY2011 SRW's and all MY2011 F450 and F350 DRW's have finned aluminum rear diff covers.
Moving on to the relevant part:
Coating the aluminum will reduce the ability to transfer heat.
Whether or not this will damage anything depends on the heat loading of the rear end.
Ford spends the extra money on the finned covers for a reason?
Some MY2011 SRW's and all MY2011 F450 and F350 DRW's have finned aluminum rear diff covers.
Moving on to the relevant part:
Coating the aluminum will reduce the ability to transfer heat.
Whether or not this will damage anything depends on the heat loading of the rear end.
Ford spends the extra money on the finned covers for a reason?
More Turbo
Joined: Aug 2002
Posts: 538
Likes: 45
From: Lansing, MI
I disagree. I know of 32 people with MY 2011 SRW trucks that have the finned cover. Based on the data I've collected they made the change to stamped covers for SRW trucks with build dates of 11/2010 and later. Take a look at my spreadsheet when you have a minute. Link is in my sig.
Posting Guru
Joined: Oct 2009
Posts: 2,453
Likes: 4
From: AZ
Surface colour
The heat transfer from the heatsink is mediated by two effects: conduction via the coolant, and thermal radiation. The surface of the heatsink influences its emissivity; shiny metal absorbs and radiates only a small amount of heat, while matte black radiates highly.
The heat transfer from the heatsink is mediated by two effects: conduction via the coolant, and thermal radiation. The surface of the heatsink influences its emissivity; shiny metal absorbs and radiates only a small amount of heat, while matte black radiates highly.
Posting Guru
Joined: Oct 2009
Posts: 2,453
Likes: 4
From: AZ
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Senior User
Joined: Nov 2005
Posts: 290
Likes: 0
From: Albuquerque
and if painting or coating the diff cover black would really improve heat transfer out of the fluid, it would be painted black. Also, coatings, especially undercoatings, act as insulators.
If that gets on your diff, get it off.
If that gets on your diff, get it off.
More Turbo
Joined: Aug 2002
Posts: 538
Likes: 45
From: Lansing, MI
Excellent information. Would you mind adding his information to the spreadsheet in my sig. The more data the better!
Thread
Thread Starter
Forum
Replies
Last Post
Fexx22
1973 - 1979 F-100 & Larger F-Series Trucks
4
Dec 27, 2011 08:16 AM
78ford351m
1973 - 1979 F-100 & Larger F-Series Trucks
18
Apr 13, 2006 04:48 AM
