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Any tips on driving a 8LL trans?

Discussion in 'Heavy Equipment & Pavement' started by mrusk, Oct 20, 2012.

  1. mrusk

    mrusk LawnSite Gold Member
    Messages: 3,260

    Long story short, I bought a 2005 Pete 335 roll off truck. Has a 300hp cat with a 8LL transmission. I never drove a manual transmission in a car or truck before. Only bikes and quads.

    The truck was delivered Monday and today was the first time driving it. Luckily park in a big complex and have plenty of space to practice. I had a truck driver with explain the basics with me. He spent around a half hour with me. I didn't do to well driving around the lot with him. Hes able to shift all the gears with out touching the clutch. Where I am struggling to to not grind gears with the clutch.

    Luckily, i'm not easily discouraged. I know practice is everything, but what tips can you guys give me?





    CLARK LAWN LawnSite Silver Member
    Messages: 2,526

    I'm assuming that is a none synchronized trans, if it is NEVER push the clutch to the floor with the truck moving. You will destroy the clutch brake and have a hell of a time getting it into gear after that. You also need to double clutch to shift until you can shift with out the clutch.
    Posted via Mobile Device
  3. bobcat_ron

    bobcat_ron LawnSite Fanatic
    Messages: 10,137

    Float the gears, I've done it a few times in my own Jeep, it's a combination of backing off the throttle a hair and getting the next gear and matching the engine speed to the next gear.
    Posted via Mobile Device
  4. jsslawncare

    jsslawncare LawnSite Bronze Member
    Messages: 1,673

    Rpm's are everything.
  5. BrandonV

    BrandonV LawnSite Platinum Member
    Messages: 4,613

    You only clutch first!!!! As for tips, dont coast stay in gear and practice.
  6. ma71t

    ma71t LawnSite Member
    Messages: 19

    Damn.......nice truck.
  7. 44DCNF

    44DCNF LawnSite Bronze Member
    Messages: 1,563

    Read the manual. If it has break in oil installed from factory, make sure to have it changed out when it says, in a timely fashion. If it is spec'd for synthetic use a synthetic of the grade it calls for. Don't let someone put another oil in it because that is what they are used to and think it'is better because their grandfather used it. Fulller RTO 146-13 for example spec'd synthetics of 50 weight because non synthetic gear lube was hard on certain parts and was found to caused accelerated wear. A company I worked for thought they knew better than what Fuller had researched and called for. They used 80w-90 GL and it damaged said components.

    And follow what Clark says.

    Don't let a hack adjust your clutch brake or clutch. Makee sure you choose a mechanic that knows his onions. Keep linkage greased properly. Don't over greae any zerk that leads into the bell housing. I am thinking of the Fuller set up on a Ford; yours may be diff.
    Dont ride with your foot touching or slightly depressing the clutch pedal at the top of it's travel. If you've driven sticks before that's a given.

    You will find times when you need to clutch other than starting out and may do so. A quick double clutch will be your friend in those times. Soft ground, pulling heavy load up a grade, etc.
  8. ksss

    ksss LawnSite Fanatic
    Messages: 7,162

    If your not used to driving a truck tranny and this is your first the 8LL will be fine. What I struggled with is being used to a typical H pattern where you go up and down through the grears. The 8LL goes from 3-4 right next to each other. That kicked my ass when I wasn't paying attention to the pattern. I sold that 8LL truck and so its not an issue now. Having the super low tranny is nice for a construction truck.
  9. Cornell

    Cornell LawnSite Senior Member
    from MN
    Messages: 544

    Sharp looking rig
  10. sbrem

    sbrem LawnSite Member
    from Vermont
    Messages: 14

    Most 8LLs actually have the regular H pattern, but some have the backwards patten that you are talking about. A company that I used to work for had 4 trucks with 8LLs, two had the regular pattern and two had the backwards pattern. Could make going between the different trucks a little confusing.

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