Back in April I posted about a torque converter lock-up problem that I
was experiencing on my 2000 Cummins 2500.   Since that time, every time
I drove the truck, at about 45 MPH the torque converter would jump in
and out of lock-up.  For months I dealt with it by stomping on the
accelerator or eventually it got so bad I had to shift out of
overdrive, especially while towing.  I tested what I could on the APPS
and the brake pedal without solid conclusions.  Anyway, it eventually
got so bad I had to do something.  As a last drastic measure, I tried
these two fixes, and if they hadn't worked I was off to buy the $480
APPS the next day.  The fixes were to "reset" the APPS and to reroute
the alternator ground wire.  Well to my surprise, one of the fixes
worked (don't have a clue which one) and the problem hasn't presented
itself again in 2 weeks/500 miles.  The only suspicious thing I
observed was the ground wire was laying across and in contact with the
alternator, so I relocated it and shielded it.  If that was indeed the
problem, kudos to Tony Garcin at Dunrite Converters for sharing!  It
could have been a long time before that was discovered.  While I don't
know which fixed it, if the problem reoccurs at least I know it's
electrical which gets me somewhere (and I suspect if it's the APPS it
will resurface).

Anyway, thanks to all who responded.  I offer this in the hope that it
helps someone else along the way.

While I was on a roll, I finally installed the fuel pressure gauge that
Roy and Tom had advised years ago.  It was an easy fix with the parts
from Geno's.

Jack

How to reset the APPS:
http://www.dieseltruckresource.com/faq/faq.php?display=faq&nr=128&catnr=7&prog=1
&lang=en

How to shield the alternator ground wire:
http://www.turbodieselregister.com/news/index.php     (about 2/3's down
the page)

Original post:
http://groups.google.com/group/alt.autos.dodge.trucks/browse_thread/thread/c7062
93edf7f9fa4/0d7ebab565665f7b?lnk=st&q=2000+dodge+apps&rnum=1&hl=en#0d7ebab565665
f7b