5spd surprise

[Jeff Miller]

That's a little low for the 5.29, but about right. It is too high RPM
for any other gearing, likely the speedo or tach are not 100%
accurate.

Yes it downshifts in the same sequence, down into 2nd, then out of
overdrive, then down to 1st.

Climbing grades will never in my experience overheat the transmission
no matter how hard you try, as long as the torque converter is in
lockup. Once you drop out of lockup, the transmission starts to
generate lots of heat, and that heat also goes into the radiator and
drives the engine temp up. Keep that in mind when climbing as the '82
didn't normally come with a transmission temperature gauge, something
worth adding.

- Jeff Miller
in Holland, MI


--- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> Thanks. I will try that and report back. It may be a few days
before
> I have it out on the road again. Does it also shift down the same
> way? 2--lockup, then 2 unlocked? That would explain the double
shift
> down I was feeling in second.
> There's still the info on the 644 and 654CR in the owner's
handbook.
> It looks like it was added at the same time as the info on the new
CAT
> engine was added.
> The rear end may also have been changed. It was running about 2620
> rpm's at 64mph which seems a little low if the rear end is still the
> 5.29. There's Rockwell gear brochures in the owners handbook also.
>
> Kerry
> 82 FC 35
> Denver
>
> -- In WanderlodgeForum@yahoogroups.com, "Jeff Miller"
> wrote:
> >
> > No problem.
> >
> > The MT-643, standard WLFC transmission, has four gears. The shift
> > goes like this: 1/2, lockup, 2/3, 3/4.
> >
> > My speed reference might be a little off for the 5.29:1 gears, it
has
> > been a while since I always sent my 5.29 gears to the junkyard,
but I
> > believe it locks the torque converter when in second gear around
> > 37mph at full throttle, will drop back out of lockup about the
same
> > speed at full throttle. Select second at a stop, you will feel
the
> > 1/2 shift, then the lockup. This should tell you conclusively
that
> > with two shifts in the second gear position you are feeling the
> > lockup.
> >
> > As said before, the true 5-speed (the 654cr) is in the PT models
with
> > the 6-cylinder DD engine, the MT-643 in your bird is maxed-out at
> > 250hp.
> >
> > A five-speed is not necessary IMO on the 3208, it has a good
useable
> > RPM range to 3000rpm (Na and ATAAC, 2800rpm for Ta), it just
needs
> > more power and taller gears for highway work above 55 or 60mph.
The
> > DD 2-stroke engines really needed the 5-speed more as they're
only a
> > 2100rpm engine with a fairly narrow power band.
> >
> > - Jeff Miller
> > in Holland, MI
>