Differential Oil Temp ?
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Mark, he is driving a F250 not a F550 so me thinks the GCWR will be significantly less, 23,500? Or so and as a result was thinking the temps will be quite a bit less unless he is actually pulling in Arizona in the mid summer heat, loaded up, which is unlike anything I have experienced. Your testing is pretty severe conditions so yeah, still thinking not much higher than 250 will ever occur. I am not an insincere, just a regular guy with lots of different real world experience in different equipment for 40 years. I think I am about done trying to contribute and going out partying with my lovely wife LOL.
Lead Driver
Joined: Jul 2004
Posts: 6,950
Likes: 510
From: Foothills, CA
By the way, here are the part no's you need for the updated cover (and you need longer bolts since the alum is thicker)... Also I understand this cover will fit the front on the 4x4s -- doubt it needs it, but for looks... 
8C3Z-4033-A COVER
6L1Z 4346-AA BOLTS X12
BP0fMD: Another advantage of the Magtec is extra fluid -- I can't justify 5x the cost though.....
8C3Z-4033-A COVER
6L1Z 4346-AA BOLTS X12
BP0fMD: Another advantage of the Magtec is extra fluid -- I can't justify 5x the cost though.....
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 60
Josh
Lead Driver
Joined: Jul 2004
Posts: 6,950
Likes: 510
From: Foothills, CA
Thought I'd throw this in for you to consider: I emailed riffraff about if they carryed the'08 cover and Clay said they have their own now. It looks nice (black and alum fins), holds an extra qt. and has a drain plug! (where you could put your sensor). Plus they use a Vitron o-ring so no need for sealant.
Oh yeah and it's only $219.33... Check it out:
Riffraff Diesel: Riffraff Diesel Rear Diff Cover
Oh yeah and it's only $219.33...
Check it out:Riffraff Diesel: Riffraff Diesel Rear Diff Cover
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I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Thought I'd throw this in for you to consider: I emailed riffraff about if they carryed the'08 cover and Clay said they have their own now. It looks nice (black and alum fins), holds an extra qt. and has a drain plug! (where you could put your sensor). Plus they use a Vitron o-ring so no need for sealant.
Oh yeah and it's only $219.33... Check it out:
Riffraff Diesel: Riffraff Diesel Rear Diff Cover
Oh yeah and it's only $219.33...
Check it out:Riffraff Diesel: Riffraff Diesel Rear Diff Cover
Thread Starter
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FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
OK...finally have a "real world" answer for this. Just got back from a two week run up north to get cool from this Maryland "hazy, hot and humid" but the weatherman had different ideas! Was running up into PA on 222 & I-476 in close to 100* heat and saw temps on the rear end right up next to 200 degrees at the highest. After running about 2 hours normally, it stayed about 180 but in those mountain passes it got right at 200. It takes a while to get up to 180. If running below 2 hours, you probably will never get to 180 - unless you are in the mountains. In winter/cool weather it'll be tough to get it to 180.
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
Lead Driver
Joined: Sep 2012
Posts: 7,827
Likes: 96
From: Manteca,Ca
OK...finally have a "real world" answer for this. Just got back from a two week run up north to get cool from this Maryland "hazy, hot and humid" but the weatherman had different ideas! Was running up into PA on 222 & I-476 in close to 100* heat and saw temps on the rear end right up next to 200 degrees at the highest. After running about 2 hours normally, it stayed about 180 but in those mountain passes it got right at 200. It takes a while to get up to 180. If running below 2 hours, you probably will never get to 180 - unless you are in the mountains. In winter/cool weather it'll be tough to get it to 180.
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
OK...finally have a "real world" answer for this. Just got back from a two week run up north to get cool from this Maryland "hazy, hot and humid" but the weatherman had different ideas! Was running up into PA on 222 & I-476 in close to 100* heat and saw temps on the rear end right up next to 200 degrees at the highest. After running about 2 hours normally, it stayed about 180 but in those mountain passes it got right at 200. It takes a while to get up to 180. If running below 2 hours, you probably will never get to 180 - unless you are in the mountains. In winter/cool weather it'll be tough to get it to 180.
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
I was surprised to see my coolant/oil temps stay within the recommended 15* spread even in the mountains. Going up they'd pretty much stay about 8-12* difference...even getting up to 230/235 but peak the hill and down the water temp would come with the oil following...but much slowly (Oh yes, the fan was screaming!). Running in the "not-so-high hills" those temps would always stay within that 15* spread - up AND down . I do have studs in the engine and the EGR valve is stock, as is the oil cooler. Running Shell 5-40 synthetic. (Rotella)
