What is up with the questions about gearing?

Discussion in 'Ask An Owner Operator' started by Ridgeline, Aug 26, 2019.

Page 4 of 9
  1. Midnightrider909

    Midnightrider909 Road Train Member

    Joined:
    Oct 26, 2016
    Messages:
    2,383
    Thanks Received:
    9,599
    0
    I have a 12 speed Ishift and 2.64 rears and average well over 9 mpg. Gearing matters.
     
    Midnightrider909, Aug 26, 2019
    #31
    jamespmack and uncleal13 Thank this.
  2. starmac

    starmac Road Train Member

    Joined:
    Apr 11, 2019
    Messages:
    6,639
    Thanks Received:
    12,528
    Location:
    Fairbanks Ak
    0
    So is my B model cat, and hopefully next summer a big cam will be also.
     
    starmac, Aug 26, 2019
    #32
    jamespmack and OLDSKOOLERnWV Thank this.
  3. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    Joined:
    Jan 20, 2010
    Messages:
    8,731
    Thanks Received:
    25,084
    Location:
    Hesperia, Ca.
    0
    I’ll stick with my RTO 13 and 3:36’s, tall rubber.
     
    Diesel Dave, Aug 26, 2019
    #33
    jamespmack and Big_D409 Thank this.
  4. snowwy

    snowwy Road Train Member

    Joined:
    Jul 6, 2009
    Messages:
    20,555
    Thanks Received:
    13,283
    0
    According to FL dealer shop.

    The megas spend MILLIONS in research for fuel economy.
    I've seen a couple of England test trucks floating around the valley few years back. This was when the trailer fins were getting started.
    Last month I saw their latest test trucks. HYBRID.

    Don't blame the drivers because that's what they learned on.

    The whole automatics and small rearend gears. Is the mega's quest for economy.

    Over on one of the other posts. Drivers say their trucks pull just fine in the mountains. And some even brag of better then 7 mpg.
    They all pull better then me. But I don't think I've got the best power. And I weigh more.

    ((((((( SHRUG )))))))
     
    snowwy, Aug 26, 2019
    #34
    jamespmack Thanks this.
  5. starmac

    starmac Road Train Member

    Joined:
    Apr 11, 2019
    Messages:
    6,639
    Thanks Received:
    12,528
    Location:
    Fairbanks Ak
    0
    When Autos first started getting used by the megas, they claimed it was because they it would make it easier ti teach drivers to drive, fuel mileage was not mentioned.
    As far as I know the old helmut still holds the fuel mileage record, but it was so ugly no one would drive them. lol
     
    starmac, Aug 26, 2019
    #35
    jamespmack Thanks this.
  6. Old Man

    Old Man Road Train Member

    Joined:
    Apr 3, 2009
    Messages:
    4,597
    Thanks Received:
    13,470
    Location:
    Oklahoma City, OK
    0
    Want a truck that pulls good, buy horsepower, enough hp will overcome any gear ratio. Want fuel mileage, keep your right foot under control.
     
    Old Man, Aug 26, 2019
    #36
    exhausted379, jamespmack and starmac Thank this.
  7. Cattleman84

    Cattleman84 Road Train Member

    Joined:
    Nov 1, 2017
    Messages:
    9,925
    Thanks Received:
    70,822
    Location:
    The Sticks, Idaho
    0
    The biggest thing is that for FLEETS .1 mpg diference across a fleet of 100 trucks can save the fleet like $25k to $30k annually... So for FLEETS gearing higher to match with whatever speed they govern the trucks at makes sense.

    But for O/O gearing higher to get a few tenths better fuel mileage at a low speed but gutless doesnt make that much sense at all.
     
    Cattleman84, Aug 26, 2019
    #37
    Dino soar Thanks this.
  8. rank

    rank Road Train Member

    Joined:
    Feb 11, 2010
    Messages:
    9,918
    Thanks Received:
    113,504
    Location:
    50 miles north of Rochester, NY
    0
    Now that’s a quotable quote
     
    rank, Aug 27, 2019
    #38
    exhausted379, jamespmack and Cattleman84 Thank this.
  9. rank

    rank Road Train Member

    Joined:
    Feb 11, 2010
    Messages:
    9,918
    Thanks Received:
    113,504
    Location:
    50 miles north of Rochester, NY
    0
    Jesus really Ridgeline? here we go again.

    because every other time a piston comes to TDC, fuel gets burned. Fewer times = less fuel. Simple math as they say
     
    rank, Aug 27, 2019
    #39
    jamespmack Thanks this.
  10. rank

    rank Road Train Member

    Joined:
    Feb 11, 2010
    Messages:
    9,918
    Thanks Received:
    113,504
    Location:
    50 miles north of Rochester, NY
    0
    Looks like my old ‘86 with the 3.90 rear will have its day in the sun again. 1500 RPM at 55 mph bought from Knoxville Pete. I bet when they built her it wasn’t with 65 mph speed limiter speeds in mind
     
    rank, Aug 27, 2019
    #40
    Tug Toy, exhausted379 and jamespmack Thank this.
Page 4 of 9