Interesting. I was curious as the techs were trying to convince me that the small steps in acceleration was just they way they are now. In contrast, the Jungheinrich literature describes the situation very differently-

Note the mention of "stepless speed control in below ECR 327 literature" with print date of 2010.

(add www to this) kellytractor.com/eng/images/pdf/forklifts/jungheinrich/walkies/ECR-327-336.pdf

And another brochure from 2010..

madisa.com/sites/default/files/producto/ficha/ficha_jh_carretillaselectricas_ECR327_en_0.pdf

"Controlled by design
Control is the key concept behind the
ECR 327/336. The synchronization of
the Jungheinrich 3-phase AC motor
and controller allows for the smooth,
precise movement of the truck at the
speed you designate"

Smooth, precise movement ?? Mine is the opposite of that !

This situation is most curious. Even if they can't figure out how to fix this particular jack one would think they would get me another or offer a refund, but I continue to be ignored.

I wonder if it's possible all the ECR327's are this way, but all the others perhaps were sold to users that either aren't familiar with how an electric pallet jack is supposed to run and/or to users loading produce or other palletized goods where a bit of crashing into the pallets is no big deal and they are running at such breakneck speed they simply don't care how smooth the acceleration is ?