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Tow Capacity Ratings

Discussion in '2.5 Gen TRD Pro (2014-2021)' started by TundraTSS19, Feb 22, 2019.

  1. Feb 22, 2019 at 6:24 PM
    #1
    TundraTSS19

    TundraTSS19 [OP] New Member

    Joined:
    Dec 5, 2018
    Member:
    #22626
    Messages:
    332
    San Antonio, TX
    Vehicle:
    2020 Tundra TSS SR5 Crewmax 5.7L
    LED step bar light strips
    I'm pretty familiar with tow capacities in calculating them. What I'd like to know is that makes the difference in rating between a Class III vs Class IV on the tundra? I have the 4.6L crewmax so is it just the engine size or is there something extra as far as the receiver is mounted to the frame. I was looking at ratings of the Tacoma and the tow capacity is approx the same utilizing an even smaller motor. How can that be. I just wanted to have further understanding in this area.

    If there are no differences receiver wise between a 3 & 4, could you technically tow more as long as you're within GCVWR? Please excuse my ignorance.
     
  2. Feb 22, 2019 at 7:20 PM
    #2
    muisejt

    muisejt New Member

    Joined:
    Aug 19, 2017
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    #9142
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    Male
    Vehicle:
    2017 Sunset Bronze 1794 Edition 4x4
    Auburn LSD, TRD rear sway bar, LED interior lights, Weathertech floormats, Fumoto valve
    The whole drive train will determine the tow capacity. Toyota decided what tow ratings it wanted for each engine and designed the tranny and axles around that.

    Class III is rated for 6,000lbs
    Class IV is rated for 10,000lbs

    Could you tow more that the rating? Sure but it won't be safe and something would probably break. If you plan on towing you need to know your "trailer" and then buy the truck that can tow it.
     

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