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Ed covered this pretty well. Gas engines "RPM sweet range" for producing 
torque is higher than that of Diesel engines. Torque is more important 
for towing than horsepower. A gas engine is also "red lined" at a higher 
RPM than a Diesel engine. Look on your tack and you will see an 
indication of the "red line." For a gas engine 3 k is no big deal.

The modern computer controlled automatics do a fine job managing your 
engine/transmission. The newer models even have a "tow/haul" mode which 
is particularly useful in "city driving" where it raises the shift 
points to keep the engine for being "lugged" or on downhills which 
imparts some compression breaking.

So let the computer manage you engine/transmission. It knows a lot more 
about what is going on from the feedback from the various sensors than 
you know.

One final thing is if you have a marginal sensor - it can cause 
problems. You can have an authorized service center for the truck make 
test this. Also there might be a more recent release for the computer 
firmware - again an authorized service center would be the place to 
contact.

Truman



Sharon Levasseur wrote:
> I guess I'd be interested to hear that as well.  I've got a gasoline 5.3L V8
> hauling a 16' steel GN stock trailer with 1-2 horses in it.  I've never seen
> the RPMs over 3k, and it's usually about 2k.  It never occurred to me that I
> should worry about the number... I just don't let it shift into a gear that
> makes the engine scream, if you know what I mean?
> -Sharon L. in Maine
>
>
> Quoting Val Nicoson <vnicoson@xxxxxxxxx>:
>
>   
> > I have a 1/2 ton truck pulling a 3-horse BP trailer and the truck has an RPM
> > meter on the dash display.
> > It has a gas engine and a 4.5 or 5L engine...don't know which.
> > While hauling 2 horses today I noted the RPM read 2-1/2 and up to 3 on
> > occasion...depending upon my speed and the terrain.
> >
> > So I'm just curious at what RPM reading does it show the truck/engine may be
> > straining vs not.
> >
> > Just Curious,
> > Val
> >
> >     
>
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--

“It doesn't matter how beautiful your theory is, it doesn't matter how 
smart you are. If it doesn't agree with experiment, it's wrong” Richard 
Feynman, Nobel Laureate in Physics


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