Take off ability with 2.47 / 2.64 gears

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Lowkie695, Jan 1, 2024.

  1. Lowkie695

    Lowkie695 Bobtail Member

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    Jan 1, 2024
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    Looking at 2016 or newer Volvo VNL trucks with D13 (405 -435 hp), 12 sp Ishift Direct Drive with 2.47 or 2.64 gears.
    Will be used on farm application pulling hopper bottom loads with total weight 80K - 100K out of fields/gravel roads. We park the trucks to head straight out of the field. 50% of the time we are on the road filling across the ditch. We don't park in areas where we have to drive through ditches or quarter mile out. Currently have a 1995 Intl 9200 with M11 10 sp 3.55 gears and 1996 Volvo WG64 with VED12 13 sp 4.10 gears. If traction is good Volvo does not have any problem. The 9200 you need easy off the clutch when getting going on road or in field. Put about 20K miles total between both trucks.
    Just wondering how a VNL would do with 12 sp Ishift Direct Drive with 2.47 gears.
    Want a newer truck with autoshift, easier to find someone drive.
     
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  3. Cat sdp

    Cat sdp . .

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    They all run that these days. And they probably don’t have full lockers or tall rubber either.
     
  4. 201

    201 Road Train Member

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    With automatics, you can get by with ratios like that for fuel economy, but with a stick, you'll be frying clutches, as 1st gear and 2:67s won't be low enough for field applications. And I did farm work, you run into soggy situations all the time. You aren't going for "triple digits" anyway, and no less than 3:90s, I'd have to think.
     
  5. Judge

    Judge Road Train Member

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    that cascadia i have is 2.67.
    i don’t have problems, but, have learned of loading heavy in field before taking off. ease back a little, truck sinks a bit in field with weight, then take off forward, makes it easier seems to me.
     
  6. Deezl Smoke

    Deezl Smoke Medium Load Member

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    Don't do it. From a life long farmer, though in a different area, you are used to 2 small engines with better gearing. Going to that higher torque engine with that strictly otr gearing is going to make you wish you had not found that low priced vnl. Your wg64 is a city truck that can work fine on a farm. That vnl is a otr truck that needs to stay otr. Regardless how hard you try to keep it on the roadway to load with the buggy, and regardless how few miles you put on it annual, the risk of drive train failure putting that truck in your rotation, is too high IMO.
     
    J.S. Thanks this.
  7. Lowkie695

    Lowkie695 Bobtail Member

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    Jan 1, 2024
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    Thanks all for the feed back. I've looked as some VNL's with 3.42 and ATO transmission, 1st gear being a 11.73. Just cannot find any reasonably priced trucks with a crawler gear and automatic...unless I spend some $$$.
     
  8. Magoo1968

    Magoo1968 Road Train Member

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    Find out what first gear is on the direct drive . I know a 2.64 starts out like a 3.55 ratio with a double over 13 speed . A direct drive will put more stress on driveshaft though .
     
  9. Lowkie695

    Lowkie695 Bobtail Member

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    Jan 1, 2024
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    The AT direct drive is 14.95.
    I can't find any direct drives with a rear-end shorter than 2.64. They are either 2 64 or 2.47. Once the rearends go to 3.08, then the transmission switch to the ATO overdrive trans.
     
  10. uncleal13

    uncleal13 Road Train Member

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    A direct drive transmission has a lower first gear than an overdrive one. 14.94 first in a direct vs 11.73 in an overdrive.
    At 140,000 lbs hauling hopper bottom super B trains on road they were fine. In a soft fresh field we found they had to be towed or pushed to get started.
    In the older trucks you did have a greater risk of twisting a drive shaft or breaking an axle using a direct drive in the fields, the newer trucks kinda limit the torque to prevent that from happening, but that also prevents you from getting it rolling in tough conditions.
     
    Lowkie695 and Magoo1968 Thank this.
  11. Lowkie695

    Lowkie695 Bobtail Member

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    Jan 1, 2024
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    This is good information. Thanks.
    I'm trying to get a gear ratio of 40:1 or bigger. The only way is with the ATO overdrive at 11.73 x 3.42 or 3.55 gear ratio.
    Or I'm trying to find a truck with the crawler gear for I-shift, but can't find any in my price range.
     
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