Mods for longevity?
Moderator
Joined: May 2004
Posts: 6,508
Likes: 899
From: Home Base Nebraska
The only thing I did to my trucks for longevity was to switch every fluid I could think of to synthetic.
1. Oil
2. Transfer case
3. Differentials front and rear
4. Power steering
The tranny I left alone because I believe the OEM fluid is best for it.
These I could also do my self at home.
1. Oil
2. Transfer case
3. Differentials front and rear
4. Power steering
The tranny I left alone because I believe the OEM fluid is best for it.
These I could also do my self at home.
Denny
Moderator
Joined: May 2004
Posts: 6,508
Likes: 899
From: Home Base Nebraska
When you guys change to the aluminum rear end cover do yo have any trouble with leaking. After the last time I changed my fluid it will not stop leaking, it doesn't leak much but it's a pain in the butt. I have a Dana 80 so I don't have trouble with the paint pealing off.
Denny
Denny
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
When you guys change to the aluminum rear end cover do yo have any trouble with leaking. After the last time I changed my fluid it will not stop leaking, it doesn't leak much but it's a pain in the butt. I have a Dana 80 so I don't have trouble with the paint pealing off.
Denny
Denny
http://www.permatex.com/products/Aut...sket_Maker.htm
Elder User
Joined: Sep 2007
Posts: 803
Likes: 1
From: S CAL
When I read the owners manual I thought is said that only the rear diff came with synthetic fluid and the front diff did not. Since I changed my rear diff covers the fluid was changed out any ways.
Senior User
Joined: Feb 2011
Posts: 248
Likes: 0
True. Only the rear is synthetic. I run standard 80w-90 in my front. Not sure if thats what they call for, but its what has been run in dana 60,s since the beginning of time.
Moderator
Joined: May 2004
Posts: 6,508
Likes: 899
From: Home Base Nebraska
I used regular Permatex gasket maker on mine originally and got some seepage. I pulled the cover, cleaned the surface and used Permatex "Right Stuff" which sets up very firm like the OE sealant. The "Right Stuff" is actually an OE replacement. It got rid of the slight leak. Also make sure you don't put too much oil in the diff when you refill it. Too much oil can cause the pinion seal to leak oil.
http://www.permatex.com/products/Aut...sket_Maker.htm
http://www.permatex.com/products/Aut...sket_Maker.htm
I well try that next.Denny
Postmaster
Joined: Jun 2008
Posts: 2,564
Likes: 11
From: Wayyy NoCal, USA
Mag-Hytek cover with no sealant, just original o-ring. No leaks.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
Mag-Hytek cover with no sealant, just original o-ring. No leaks.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Postmaster
Joined: Jun 2008
Posts: 2,564
Likes: 11
From: Wayyy NoCal, USA
The diff temp actually fluctuates quite a bit.
Unloaded, it is usually within 50 degrees of ambient temp. Towing on flats, more like 100.
Highest I've seen? With a GCW of 19K pounds on hot days climbing Siskiyou Grade or Donner Summit (both include at least 15 minutes of continuous pretty hard pull), it has crept up almost 175 over ambient. I have seen over 260 on the gauge on hot summer days.
Unloaded, it is usually within 50 degrees of ambient temp. Towing on flats, more like 100.
Highest I've seen? With a GCW of 19K pounds on hot days climbing Siskiyou Grade or Donner Summit (both include at least 15 minutes of continuous pretty hard pull), it has crept up almost 175 over ambient. I have seen over 260 on the gauge on hot summer days.
Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
Mag-Hytek cover with no sealant, just original o-ring. No leaks.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
I have temp gage in differential, and can confirm there is NO real need for a bigger cover unless you're towing heavy. Mine runs about 50 to 100 degrees higher when towing - so stock cover should be more than adequate for unloaded driving.
Ditto, no leaks in 75k of use.
Pap
Thread
Thread Starter
Forum
Replies
Last Post
sunuvabug
1999 - 2003 7.3L Power Stroke Diesel
52
May 13, 2013 02:32 PM
