From: Sonny Heath (sonny@defuniak.com)
Date: Wed Nov 24 2004 - 18:19:41 PST
About three or four years ago I went up to Baskin's truck sales on hiway 50
some fifty miles north of Memphis, Tn and took the truck that I wound up
buying a few hours later for a test drive. The owners son drove as we left
the lot and then stopped a few miles down the road and let me drive back. I
double shifted each gear as that was the way I was taught to do it at
Landstar Poole Trucking Company in the early nineties when I attended their
driving school after having driven about everything the Army had for more
than twenty years, BUT I needed a CDL to replace my Standard Form 46. The
25 year old "Whippersnapper" immediately called himself getting all over me
for using the clutch when changing gears after being in motion. He said
that the truck has a no clutch transmission or some such mess. Later I
contacted Freightliner and they said he was badly misinformed. After I got
used to the truck though I discontinued using the clutch except when
starting out and stopping.
Am I wrong and/or doing damage to the vehicle by not using the clutch?
All input appreciated.
Sonny
----- Original Message -----
From: "GOTaM35" <GOTaM35@joetrapp.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Wednesday, November 24, 2004 7:51 PM
Subject: Re: [MV] Syncros and Marines
> Years ago when I was less mature (I still reserve the right to be
immature)
> I would double shift vehicles to make myself feel like I was driving
> something more than I was (lets face it, a 61 ford falcon is no truck).
>
> I have always noticed double shifting a synchronized transmission is more
> difficult than just shifting. Your experience may differ. One thing to
> consider is the extra wear on the clutch, linkage, throw out bearing and
> your leg. I have also noted only the big rigs I have driven tend to have
> the gear ratios close enough so that a good bump of the clutch and fuel
> petal lets it slide right into the next gear. Also don't underestimate
the
> ability of the gear in question to slow back down to a speed lower than
> desired by the time you push the clutch in and move the gear shift.
>
> Besides I think most "real" truckers will say they don't double clutch
much
> on the up shift, but ALWAYS on the down shift.
>
> Just one opinionated pessimist' take on things.
> Joe Trapp
>
> ----- Original Message -----
> From: "Winget William A Contractor CIV JTFCS J5"
> <William.Winget@jtfcs.northcom.mil>
>
> If Syncros have to spin up the gear clusters to allow gears to shift
without
> clashing, wouldn't speeding up the transmission gears with the engine by
> double clutching accomplish the same WITH less wear to the (usually) brass
> syncros?
>
> Doesn't make any sense to me that double clutching would damage a syncro,
> rather it would make it's job much easier and last much longer. Sure wish
> my Command Car had syncros...
>
>
>
>
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