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LIKE2BUILD's avatar
LIKE2BUILD
Explorer
Nov 08, 2019

Banks Differential Cover

A while back I came across a video series of Banks Performance testing differential covers. I thought it was interesting and very well done.

Now I see why. They've introduced the Banks Ram Air Differential Cover. I've already installed an AAM aluminum finned cover on my Ram 2500 so I don't really plan to change it out for this one. But, the science and engineering they put behind it are really interesting. They put a lot of time into measuring temps and air flow around the cover and observing oil flow inside the diff. It's really curious they purposefully extended part of the cover below the axle to grab air and flow it across the fins.

Maybe the new diesel emissions rules are clamping down on their business so now they are turning their attention to other performance enhancement options? :h Either way, the cover does look well designed and not just a show piece.

KJ
  • This whole thing reminds me of a solution waiting for a nonexistent problem.

    Kind of like people freaking out over 240F ATF temps. :R
  • time2roll wrote:
    I would not buy a cover that created a new low point to hit with a rock.

    That was a concern of mine as well. Did you see the part at the very end of the video where he addressed that situation? Fast forward to the 32:00 minute mark to see it if you didn't. Gale took a piece of steel rod and a 4lbs hammer and clobbered the part that hangs down. In his controlled condition the only thing that broke off was the part that hangs down leaving the rest of the cover in tact. He says directly if that happens, they'll give you a replacement.

    Now, it's entirely possible the rock you hit will be funky breaking another part and allowing your gear oil to leak out. If that fries your axle will Banks cover it? Not sure.

    I think they really intended this cover for on-road use trucks that are hauling heavy loads on the rear axle. Sure this could be used for an off-road truck, but the way they designed the fins and air intake it seems they are targeted conditions where the truck is at-speed flowing air across the cover and actively cooling the fins.

    KJ
  • I believe they work but they look very cool regardless. TY for posting.
  • time2roll wrote:
    I would not buy a cover that created a new low point to hit with a rock.


    It doesn’t sit more than an inch lower than the diff itself, in fact the one in the video looked less than an inch. With that said. At the end of the video he showed what it would take to break off the fins. He also said that if it did break off you get a new cover for free. It’s meant to break away. And it won’t lose any fluid.
  • I would not buy a cover that created a new low point to hit with a rock.
  • Watch the whole video and found it to be very informative.
    Thanks for posting.
  • Thanks for posting this very interesting diff cover


    It might fit my Sub, as the others stick out and interferes with the tank skid plate


    Was going to (maybe still going to in addition to this) just use a healthy dose of either Molybdenum Disulfide or Tungsten Disulfide

    Issue with those super lube additives is with anything with friction clutches. Too slippery abd clutches will be ruined

    Will check this out some more