[DML] Re: Slam/RPM Shifting, Part Deux

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Slam-shifting (aka speed-shifting) is changing gears without using the
clutch. Many books about racing touch on this subject. It is not for
the faint-of-heart. You cannot drive in traffic and you put yourself
and the people around you in jepordy. You put tremendous stresses on
the whole drivetrain, the transmission in particular. You can strip
gears, wreck synchros, bend or crack the shift linkage and explode the
gearcase. If anyone was to try this they should try to practice first
and not on a public road. A missed shift or a WRONG shift can cause an
accident. Now that you have all the disclaimers it is a technique that
can be useful in certain SPECIAL situations. I would not let someone
try it on MY car though! At least if I cared about it. Try it on a
beater first. It is like driving on a hiway without brakes. It can be
done right up until that accident that you can expect to have! Let me
know what road you will be driving on and when so I can know to stay away.
David Teitelbaum
vin 10757 



--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> 
> 
> Relative to a couple of threads this spring (Messages #41013, #43300
> etc) Re: slam shifting, which CAN be done with the DeLorean Renault
> transmission quite nicely (I lived that way for a week during my ill
> fated clutch replacement. Shift points are 2300-2500 RPM):
> 
> Having just survived an adventuresome trip to New Jersey to buy a
> truck with clutch hydraulics that failed in transit:
> 
> Be very careful slam shifting on hills. Transmission speed is
> determined by how fast the drive wheels are rotating (you can not vary
> it, but rather match engine speed to it). On relatively flat terrain
> the vehicle will coast, making a leisurely and enjoyable slam shifting
> experience. On hilly terrain however the drive wheels can slow down
> very quickly. The steeper the grade, the shorter the slam shift
> window. If you fail to match RPM's in that abbreviated time span you
> may find yourself pointed uphill at a dead stop. The starter motor
> then will be unable to move the vehicle against gravity to get going
> again.
> 
> Of course stopping on a steep hill at a stop sign or stop light will
> render the vehicle immobile thereafter.
> 
> (I was able to make an unpowered 3 point turn downhill and restart the
> truck. Very dangerous and very unrecommended.)
> 
> Slam shifting is a survival technique best left for flat or gently
> sloping terrain, especially if you are navigating in unfamiliar
> territory. 
> 
> Bill Robertson
> #5939








To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/