ok guys give me some input on this transmittion rtof 958ll

Discussion in 'Trucks [ Eighteen Wheelers ]' started by earthmover, Dec 9, 2013.

  1. earthmover

    earthmover Medium Load Member

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    any info I can get on this trans would be great it is whats in the gmc I just got that's a dump truck ..I don't know anything about them as my other truck has a 709mll 9speed...I had a time shifting it on the way home but did get home and not break and thing..lol
     
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  3. Taildragon

    Taildragon Heavy Load Member

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    http://stemontreal.com/LCD/Eaton-Fuller-Tr/Eaton-Fuller-Tr-HD-PL/RTO-958LL.pdf

    This should help. I think the F refers to a forward shift bar housing, the transmission sets back farther in this cab configuration, everything else is the same, if anyone knows for sure please feel free to correct me.
     
  4. earthmover

    earthmover Medium Load Member

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    ok guys now the rto 958ll is driving me crazy my other truck ahas a 14709mll and its a 9 speed...can someone walk me through this trans...I drove it home empty so I didn't use all the gears lol no load so now im kinda at a lost... I was told it is a 13 speed by the old owner who never drove the truck he just paid someone else to drive it...but I was looking at the tag rto 958ll and was thinking it should be a 8 speed ..lol anybody can help..i know sounds crazy .....thanks
     
  5. Taildragon

    Taildragon Heavy Load Member

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    Does it have a lever on the dash marked low range or something like that?
     
  6. BigCam9670

    BigCam9670 Medium Load Member

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    It is what they call an 8 speed with low and low-low hence the 8LL. Basically just shift it like your 9 speed but where first gear is on the nine is what is called low and you should have either a button on the side of the shifter or an air switch on the dash or floor for deep reduction or low-low.
     
  7. earthmover

    earthmover Medium Load Member

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    It has the 2 buttons on the shifter just like my 9speed..thanks for the help guys
     
  8. Taildragon

    Taildragon Heavy Load Member

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    The deep reduction wasn't anything that I ever used while on the road, if I got off the road to work at a job site and the ground was soft, that was the only place I ever used it, it is a really low range.
     
  9. Cetane+

    Cetane+ Road Train Member

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    I think your problem is its a U pattern shift trans. The 9508LL I had was. When all the way to the right, high gear is forward, not back. A picture of your shifter with the air switches and I can tell you from there.
     
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  10. Hammer166

    Hammer166 Crusty Information Officer

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    123456 and Taildragon Thank this.
  11. Taildragon

    Taildragon Heavy Load Member

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    I remember that after looking at the label, but it was far enough back in time that I couldn't get it out of the archives. There is an outstanding amount of knowledge on this forum about where to get information, even when it is old information.
     
    Hammer166 Thanks this.
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