My suggestions are many-fold:
What I would suggest doing first, however, is shifting the gear selector
slower from Drive to Neutral to Reverse and see if that alleviates the
issue. Many folks just slam the shifter from one drive gear to the other
and expect instantaneous response - and it ain't gonna happen when you also
have to wait or electronic valves and hydraulic pressure. You can try
taking it to either the dealer or a reputable tranny shop and have them bump
up the line pressure inside the tranny that shifts the gearset from Drive to
Reverse. This is not really recommended - if it's even possible with the
newer units - because it may cause hard shifting and just might invalidate
your warranty. A few extra RPM while shifting (VERY few) could help, but
that's not a habit I'd want to get into. If you really believe that this is
a problem you could have a sluggish or sticky valve in the valve body
causing a slow shift so maybe a dose of tranny fluid additive that
supposedly loosens up internal valves could help (but no guarantees).
On the other hand, you mention that this issue happens before you can count
to "3". I've been driving Chevy trucks since 1988 and have had a THM700R4,
a 4L80E, and my current Allison 1000 and in all those years have never had a
tranny that shifted from Drive to Reverse in less than 3 seconds, especially
if I had even the slightest headway when I shifted. 3 seconds is resonable
for this shift so I don't think the dealer will be much help since your
tranny is most likely operating within parameters. Tranny's have much more
electronics in them today than ever before and the shift timing in this case
could actually be a programming issue. Try having the dealer reflash the
tranny computer with the most updated software (or if you already have the
most updated version, try a version slightly older than what you have).
However, in the end I don't see where a 3-second delay is a problem (and
from how many times you've posted about this neither does your dealer),
especially when reversing the tranny and backing uphill as you mention in
other posts. Frankly, if there really is nothing wrong then I guess you're
just going to have to learn to count to 3 and be patient.
Cheers - Jonathan
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I haven't checked these posts in a while.
How come it only does it when it is hot!
Two dealers have not answered that question for me.
When is is cold, the is a slight hesitation the it goes. When hot, is is
like is going to stall
<pre wrap="">Has anyone had the same problem I have?
If you stop, put it in reverse (before you can count to 3!) and press on
the gas. It runs like one cylinder is dead for a few seconds!
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