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  1. #11
    Road Train Member Preacher Man's Avatar
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    I have been using an auto shift for three months and hate it. It saves the left leg in traffic and construction zones, but that is the only real advantage. When backing up it can actually be dangerous. With a manual transmission you can control the speed of the truck by letting out on the clutch. You get a nice smooth movement of the truck. The auto shift has an annoying habit of just sitting there until it gets enough fuel to motivate the computer to engage the clutch, when that happens the entire truck will lurch backwards a good three to ten feet. (I hit a parked car because of this "feature", but that's another story.) Another thing to consider is that if you shut the truck off in gear and you have an air leak, you will not be able to start your truck until you charge the system to at least 100psi


  2. #12
    20 Year Truckload Veteran jlkklj777's Avatar
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    cons:

    Cannot pull start an automatic if your starter quits or the batteries die.
    If stuck on ice or snow all you can do with an automatic is try and rock it back and forth.
    Slower start up when accelerating.
    When backing or docking the truck does seem to "lurch" considerably.

    Pros:

    Simple to drive.
    Easier on driver in traffic jams.

  3. #13
    Bobtail Member
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    Would be nice for a while, but I still like to shift with a stick.

  4. #14
    Road Train Member Red Fox's Avatar
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    Cons: Adds 300lbs or so to the tractor.
    Pros: Makes it easier to talk your boss into an APU by keeping the real tranny.

  5. #15
    Bobtail Member
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    I bought an Automatic ZF tronic gearbox MAN truck.

    I posted this subject from about two years, and I learned few things from vistors. Anyway, I like now to add my experience. I bought an Automatic MAN truck.

    Advantages:

    - Fuel consumption is super reduced (its still deponds how u do your breaking)
    - I spoke to the company who sells them and they told never had a similar truck with cluch problem.
    - It can be booring when driving, but diffenately helps if you are very tired or when you trying to concentrate on the trafic around you. Their biggest advantage is in the city (congested roads).
    - The driver has no complete authority on rpm of the engine, it never goes to red. He can not ruin the engine by bad driving. I saw some new manual trucks, which had their engine destroyed by bad driving.
    - Its non sense when some people say, most workshops do not have the know-how in repairing automatic gearbox's. If there is a problem with any gear you need to see the dealer weather its manual or automatic.


    Disadvantage:

    - I was told a driver damaged the gearbox when driving uphill. Couldnt get enough torque and the truck returned backwards, thus broke the gearbox.
    - Many people feel the automatic gearbox would not survive in gravel roads, but I know a person who drives it in gravel roads and had no problem.
    - They are not the best to be used in mining fields or uphil downhills continuaus driving. Because I knew a person driving a Mercedes Tipper had his gearbox broken (I dont know how he damaged it, but possiple misuse by a bad driver).

    I knew Scania makes automatic gearbox's for short hauls use and trucks to be used in the city. However, I am happy with my ZF tronic gearbox and I have no intention to sell it or replace it.

  6. #16
    Road Train Member GAPrincess's Avatar
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    [quote=jlkklj777;469203]
    cons:Cannot pull start an automatic if your starter quits or the batteries die.
    If stuck on ice or snow all you can do with an automatic is try and rock it back and forth.
    Depending on the terrain this is not very effective. Best to carry some kitty litter.
    Slower start up when accelerating.
    When backing or docking the truck does seem to "lurch" considerably.
    Seems to? The difference in an automatic when hitching & unhitching the trailer is that you feel like
    you are getting whiplash! You literally have to slam the truck into the trailer to make the connection. I hate it and so does my guy who drives a Volvo automatic for his company.

    Driving through the mountains of Kentucky, Tennessee, and Georgia with a heavy load is . . . at best unpleasant. You really do need to be able to shift for mountainous terrain.


    My guy says real truck drivers drive manual transmissions. I'd have to agree.


    Pros:
    Simple to drive.
    Easier on driver in traffic jams.
    Doesn't seem like a fair trade to me. I guess if you only drive in NYC an automatic is great.

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  8. #17
    Bobtail Member
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    Hello everyone, I like to know if auto trans. have a "locking" problem, i heard comments, some auto trans. tend to lock and you will need to call sor some one to unlock them.
    Thanks for the help.

  9. #18
    20 Year Truckload Veteran jlkklj777's Avatar
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    I have also "heard" of older auto shifts refusing to shift but have not experienced this myself. If this happens you might try to pull the vehicle over and then restart it. This may reset the computer. The other option would be to try and manually shift gears. There is a "manual" button as well as up and down buttons on the ultra shift transmission so you can shift gears yourself. This function comes in handy in slippery conditions.

  10. #19
    Light Load Member Trucker79010's Avatar
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    Quote Originally Posted by santafetruck View Post
    Hello everyone, I like to know if auto trans. have a "locking" problem, i heard comments, some auto trans. tend to lock and you will need to call sor some one to unlock them.
    Thanks for the help.
    The truck in my picture is a 10sp auto...when it was bran new there was a lot of problems with the transmission locking up ... I would pull up to a red light it would get locked in 10 gear... so just turning it off and back on would not work I had to turn it off and turn the battery power off then turn it back on it fix the problem for a little while...there was a relay on top of the tranny I would have to hit if it got stuck climbing a hill...so eventually freightliner had to replace the xy sensor, and the wire harness on that truck and its been good for the last 250,000 miles.

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  12. #20
    Road Train Member Mr. PlumCrazy's Avatar
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    I drove an auto around a lot once and that told me I will never buy one. It was like the first time i drove a manual about snapped my #### neck. have to get the rpm's up to get it to move.

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