I'm pretty sure that is a downshift. I have experienced the unlock/lock and
though it has happened on occasion, I don't think it is the phenomenon. To
explain in detail:
Cruising on flat/level road at 60 mph, tach is at 1800 rpm. Tach will
bounce some from 1700 to 1900 at random (I'm sure this is the TPS). The
tach then surges to 2500 - 2600 and stalls there a bit and then you feel the
cluck of the tranny shifting to 3rd and the engine sounds louder and higher
pitched. The tach reads 3000. Then it will stay there at 3k until I
release the accelerator. Once I release, it will fall back to 2.5k or so
and then up shift to 4th again. It will stay in 4th until 20 mph if I keep
my foot off the pedal. But usually if I immediately reapply the throttle to
move back to 60 mph, the sequence will repeat, but not always. It seems to
get worse the longer I drive. It will not replicate with the O/D off at the
same rpms in 3rd. This is a random fault, and is hard to replicate, but a
real PITA once it starts happening when I have some place to go.
The new TPS should be in tomorrow, so I will talk to the dealer then and ask
about TSB's or recalls. I will get back on what I find.
Thanks for the thoughts.
Pacer
-----Original Message-----
<snip>
I wonder if you are experiencing a 4 to 3 downshift or just a torque
converter lock and unlock which can seem like a downshift? Does it do it
just after coasting and then slightly applying power and seems to upshift
again in about a second?
>
> Thanks for the quick reply Jim.
> That is what I thought too when I first noticed the problems. I did find
> that the return spring on the tranny side of the tv cable was hanging
loose
> (no idea how that happened). But I reattached and the problems continue.
> I just went out and checked adjustment again and it is spot on. I earlier
> tried driving with the tv cable disconnected, but the problem still
> occurred. I reprogrammed the PCM as per FAQ thinking that might help. I
> was thinking the TPS was related but I don't think that is all.
> Could the governer pressure solenoid or sensor be related? I saw
something
> about that in the archive.
>
> TIA
>
> Pacer
>
> <snip>
>
> Sounds like a mis adjusted kick down cable on the tb to me!
>
>
> > Pacer and Jen Baldwin from Perryton, TX
> > 1999 Dakota Sport
> > 3.9L V6 42RE
> > no perf mods.
> > Black w/ red letters
> > 49,500 miles and counting
> >
> > Having problems with random kickdown from od to 3rd. Seems to happen
the
> > most when at 1/4 throttle at 50 - 55 mph.
> > Happens only when warmed up and cruising. A/C doesn't seem to affect.
> Also
> > throttle surges 50 - 200 rpm with or without cruise on. I have a new
TPS
> on
> > order from the dealer. Is there an aftermarket TPS available?
> >
> > I have already adjusted kickdown band to 3 5/8 out from 72 in.# have
> changed
> > fluid w/ATF+3 and tested TPS with VOM. TPS seems accurate, but having
> > surging problems as related in FAQ. Have searched archives and no
> results.
> >
> > Does anyone have any experiences with this problem?
> >
> > TIA
>
> <snip>
>
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:05:12 EDT