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  1. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Thanks for doing the test. And yes, that is my position that you should not see a huge difference between the two. I went through the second video, and took the average of the "Estimated Fuel Rate gal/h" reading at the beginning of the each second (as best I could do, pausing/playing)...
  2. Awesomeness

    Highway speed gear 3.07 vs 2.87

    It's hard to argue that the automatic's inefficiency is insignificant, while also arguing that the hub heat is very significant. The automatic transmission generates way more heat than the hubs (or a manual transmission), so much that it has its own cooling system. Do AMTs have cooling...
  3. Awesomeness

    Highway speed gear 3.07 vs 2.87

    You're confusing me with someone else. I haven't said anything about you selling anything. But you're doing an awful lot of chest thumping, to help prove your points, I guess. The study even says it in passing, because, like me, I assumed everyone was on the same page about transmissions...
  4. Awesomeness

    Highway speed gear 3.07 vs 2.87

    They are good studies. The couple lines before that are equally important to our discussion here: " These fuel economy gains can be attributed to the greater efficiency of manual transmissions and the increased number of gears available in these transmissions to keep the engine operating in...
  5. Awesomeness

    Highway speed gear 3.07 vs 2.87

    What do you estimate then? I think you're agreeing less than 30HP, which would be 10% on your engine. So where does the other 20%+ fuel economy gain come from? Driveshaft yoke bearings on the axle, spinning 1/2 as fast? If you start working through these, you see why 30%+ MPG gains are so...
  6. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Ok, so by your expert opinion, 30+ HP, a full 10-13% of the engine HP is just spinning the hubs. Got it.
  7. Awesomeness

    Highway speed gear 3.07 vs 2.87

    It's not as much as you are assuming. The only thing changing spinning here is the hub gears. 1HP=746W So a 225HP engine is putting out 167,850W, and if 30% efficient is taking in 559,500W worth of fuel. Now think about if you had a standard 1500W heat gun (a 2HP heat gun)... it would have...
  8. Awesomeness

    Highway speed gear 3.07 vs 2.87

    It's operating at full RPM, not maximum power output possible for the engine (at any RPM) or full load for that RPM. You just hit the governor and it stops accelerating. It's making exactly as much power as necessary to maintain that speed, and that power requirement doesn't change because of...
  9. Awesomeness

    Highway speed gear 3.07 vs 2.87

    It would certainly be a better. I believe you measured those results, and that you believe them, but you should have immediately known better (unless you just don't understand these topics well). What's wrong with your test? One single test Mostly just highway, at one speed (could be good...
  10. Awesomeness

    Highway speed gear 3.07 vs 2.87

    The graph is created on a dyno, at 100% engine utilization, which is why I took the time to explain it so carefully. Either you didn't read it, or couldn't understand it. Maybe you're just trolling, but I'm not sure if you deserve that much credit. If you need 100HP worth of fuel to go 62MPH...
  11. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Yes, because it isn't just a simple "cut everything in half" problem. Here's how it works: If you are rolling down the highway at 62MPH, with the engine off/disconnected, you could add up all the resistances... aerodynamic drag, axle friction, tire rolling resistance, etc. Whatever that...
  12. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Best of luck to you. This is why my original statement was that there is no point arguing with such ignorance.
  13. Awesomeness

    Highway speed gear 3.07 vs 2.87

    You are literally dropping the 2:1... taking it out. So, (ignoring the unused 1st gear) it turns a closer-ratio 6-speed transmission into a wider-ratio 4-speed (across the same 0-65MPH driving speed range). The fluid torque multiplication of the torque converter was there before, and is still...
  14. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Can't prove a negative.
  15. Awesomeness

    Highway speed gear 3.07 vs 2.87

    I did read it. It just wasn't worth jumping into that circus.
  16. Awesomeness

    Highway speed gear 3.07 vs 2.87

    I did, it's called physics. You can't drop the 2:1 in the hubs, and make the truck better at everything (e.g. MPG, speed, pulling, etc.). It's not even worth arguing with stuff so completely ignorant. It's snake oil.
  17. Awesomeness

    Highway speed gear 3.07 vs 2.87

    They consider it because they don't understand physics.
  18. Awesomeness

    Highway speed gear 3.07 vs 2.87

    Obviously, but it would give you the option to disengage it.
  19. Awesomeness

    Highway speed gear 3.07 vs 2.87

    It's easy to look at it like that, but probably not how it works at all. Military vehicle parts are feast or famine... the military often decides to get rid of lots of the same stuff at once, and then there are lots of them cheap on the surplus market. Then, the supply dries up and suddenly...
  20. Awesomeness

    Highway speed gear 3.07 vs 2.87

    They come from MRAPs. The military was getting rid of MRAPs over the past several years in droves, which have the 3.07:1 gears. The military won't sell a complete armored MRAP, so they cut up the body and sell the rolling chassis and stuff. People bought up tons of the geared center sections...
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