twin stick ratios

Discussion in 'Experienced Truckers' Advice' started by rank, Apr 18, 2014.

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  1. Apr 18, 2014 #1
    rank

    rank Road Train Member

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    Anyone know where I can find the ratios for different types of twin stick transmissions 4x4, 6x4 etc? Are they all Spicer except for Mack?
     
    rank, Apr 18, 2014
    rank, Apr 18, 2014
    #1
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  3. Apr 18, 2014 #2
    wore out

    wore out Numbered Classic

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    Most of them are spicer. Do a search on here Pack Rat TDI posted the ratio's on a couple several years ago. A google search on spicer will get you some as well. I just bought a new 1750 from TTC there were 3 different ratios on that box alone.
     
    wore out, Apr 18, 2014
    wore out, Apr 18, 2014
    #2
    PackRatTDI and rank Thank this.
  4. Apr 18, 2014 #3
    PackRatTDI

    PackRatTDI Licensed to Ill

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    PackRatTDI, Apr 18, 2014
    PackRatTDI, Apr 18, 2014
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    Cetane+, rank and wore out Thank this.
  5. Apr 18, 2014 #4
    rank

    rank Road Train Member

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    yeah there was some good info in that thread. Thanks. I found some good discussion with the search tool but didn't see that one.

    I have a 1998 T800 with an M11 Cummins, 13RTLO, 4.33 rear gear, 22.5 Lo pro rubber. I routinely gross 75,000 - 89,000 through PA so I have some hills and the M11 needs that 4.33 rear gear. Problem is half of my miles are grossing 30,000 - 50,000 and I an screaming along at 1800 rpm at 60 mph.

    IFTA reports show me doing ~ .75 mg better than the big motors in our fleet doing the same runs. I have tracked fuel mileage at 70, 65, 60 and 55 mph and I still haven't found the point where teh mileage levels off.

    I think I could use another overdrive gear. Would one of these boxes fit the bill or should I be looking for a 13RTOO?
     
    rank, Apr 18, 2014
    rank, Apr 18, 2014
    #4
  7. Apr 18, 2014 #5
    rank

    rank Road Train Member

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    What did that cost?
     
    rank, Apr 18, 2014
    rank, Apr 18, 2014
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  8. Apr 18, 2014 #6
    PackRatTDI

    PackRatTDI Licensed to Ill

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    Yeah it took me a while to find it and I wrote the #### thing, lmao.
     
    PackRatTDI, Apr 18, 2014
    PackRatTDI, Apr 18, 2014
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  9. Apr 18, 2014 #7
    PackRatTDI

    PackRatTDI Licensed to Ill

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    I'd suggest adding the brownie box due to the fact the RTOO boxes can be really hard to find.

    Plus you'd gain an extra starting ratio or two.
     
    PackRatTDI, Apr 18, 2014
    PackRatTDI, Apr 18, 2014
    #7
  10. Apr 18, 2014 #8
    rank

    rank Road Train Member

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    OK...googling brownie boxes now. Search returned lots of cookies LOL.
     
    rank, Apr 18, 2014
    rank, Apr 18, 2014
    #8
  11. Apr 18, 2014 #9
    PackRatTDI

    PackRatTDI Licensed to Ill

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    Probably look it up under TTC like wore ou
     
    PackRatTDI, Apr 18, 2014
    PackRatTDI, Apr 18, 2014
    #9
  12. Apr 18, 2014 #10
    The Admiral

    The Admiral Heavy Load Member

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    We used to flip 1 of the gears in the RTO's and make generic RTOO. Can't remember just how we did that, but my old 359 would stroll with that set up.
     
    The Admiral, Apr 18, 2014
    The Admiral, Apr 18, 2014
    #10
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