Is the bling worth it? Diff Covers...
Thread Starter
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Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
Is the bling worth it? Diff Covers...
Bling bling on that lifted thing!
I see many people around town and across the country running their expensive "high capacity" diff covers - and it makes sense! More fluid equals more cooling capacity; right? Well... that may not be true for differentials.
Check out the video. Leave comments below. I'm excited to see the results... cause now we'll finally know if that bling bling with worth anything
I see many people around town and across the country running their expensive "high capacity" diff covers - and it makes sense! More fluid equals more cooling capacity; right? Well... that may not be true for differentials.
Check out the video. Leave comments below. I'm excited to see the results... cause now we'll finally know if that bling bling with worth anything
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Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
YESSSSS! Thank you for posting this!
EDIT: Looks like an excellent precursor video to the final results.
Really enjoying seeing the logic and thought process these guys use when looking at something as seemingly simple as a diff cover.
Got a strange feeling that the GM vs Mopar axles might create quite the stir!!!!! Patiently waiting mid-september
EDIT: Looks like an excellent precursor video to the final results.
Really enjoying seeing the logic and thought process these guys use when looking at something as seemingly simple as a diff cover.
Got a strange feeling that the GM vs Mopar axles might create quite the stir!!!!! Patiently waiting mid-september
Cargo Master
Joined: Sep 2013
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From: Pryor, OK
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Cargo Master
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Fleet Owner
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From: Brentwood,CA
Just like most gear boxes oil capacity is one thing but oil depth is critical. Comercial gear boxes run huge sumps but shallow depth. It keeps the gears lubricated but the shallow depth eliminates fluid friction heat build up. Most of these aftermarket covers actually have a higher fill plug than stock so that increases depth which adds heat and puts way to much oil against the axle lip seals that they were not designed for. No different than a overfilled engine oil pan, causes foaming, heat, lack of lubrication and parasitic drag.
More Turbo
Joined: Oct 2014
Posts: 504
Likes: 4
From: Malheur County
YESSSSS! Thank you for posting this!
EDIT: Looks like an excellent precursor video to the final results.
Really enjoying seeing the logic and thought process these guys use when looking at something as seemingly simple as a diff cover.
Got a strange feeling that the GM vs Mopar axles might create quite the stir!!!!! Patiently waiting mid-september
EDIT: Looks like an excellent precursor video to the final results.
Really enjoying seeing the logic and thought process these guys use when looking at something as seemingly simple as a diff cover.
Got a strange feeling that the GM vs Mopar axles might create quite the stir!!!!! Patiently waiting mid-september
Senior User
Joined: Jun 2014
Posts: 244
Likes: 3
Thanks for posting this. I’m sure there are aftermarket diff manufacturers biting their nails right now. What was once a truck badge of honor could quickly turn into the equivalent of a tramp stamp tattoo if we see detrimental outcomes of going beyond stock. Cant wait for part 3!
Thread Starter
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Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
I have a sneaking suspicion that you're correct - many diesel and lifted truck owners out there are going to have a lovely new ash tray once this is all said and done. Stock FTW? Methinks so!
Elder User
Joined: Aug 2016
Posts: 723
Likes: 3
From: Cape Town, South Africa
Thank you Gents for posting those excellent videos. 
It's quite a tease having to wait for part 3 !! LOL
When I first got my truck I fitted a United States of China shiny, blingy, thin, OE shaped chrome diff cover.
Quality was sh$t and the plug threads were insufficient.
I replaced that one with a black powder coated PML aluminium one because I wanted a drain plug. (I like the thick mating surface on it.)
Having no drain plug is a nuisance.
The oil level is the same as the OE one, but it takes an extra 1/2 litre, not much.
I immediately noticed an increase of 25 HP, 3 MPG better fuel consumption, and the 'cooling ribs' kept the oil at only 20* F.
No, I'm talking sh$t, but let's just say that I'm keen to see the part 3 results. LOL
Aaron, to be honest with you, I spent more time looking at the disc brake setup.
It's quite a tease having to wait for part 3 !! LOL
When I first got my truck I fitted a United States of China shiny, blingy, thin, OE shaped chrome diff cover.
Quality was sh$t and the plug threads were insufficient.
I replaced that one with a black powder coated PML aluminium one because I wanted a drain plug. (I like the thick mating surface on it.)
Having no drain plug is a nuisance.
The oil level is the same as the OE one, but it takes an extra 1/2 litre, not much.
I immediately noticed an increase of 25 HP, 3 MPG better fuel consumption, and the 'cooling ribs' kept the oil at only 20* F.
No, I'm talking sh$t, but let's just say that I'm keen to see the part 3 results. LOL
Aaron, to be honest with you, I spent more time looking at the disc brake setup.