Alan Casey wrote:
>
> >Hi Folks;
> >
> >I have now had my new Dak on the road for about a week, love the 5.2L and
> >the 3.92LS (kinda maybe wished I got the 3.55's). My question to the
> >owners of new ones, I have a high pitched whistle noise (sounds like a air
> >leak in the cab) at about 45MPH and above, any ideas or discoveries?
>
> >L. John Morris<ljohn@alltel.net>
> >!!!!! ... your local *HEMI* owner ...!!!!!
> >'97 SLT+ CC 4x4
> >5.2L, 3.92LS
> >
>
> Sorry John, I can't help you with the wind noise problem. But you said you
> wish you had gotten the 3.55's, why? I am considering changing my gears
> from 3.21's to maybe 3.92 or 4.10's. I am concerned about gas mileage and
> 5th gear revs at about 85 mph. What do you think? what kind of problems
> are you having?
>
> Alan...
>
Alan, 3.90 gears (the only other 'factory' ratio besides 3.55s) run
at 2800-2900 rpm @ 80 mph in 5th gear (215/75-15 tires)..around 3100 rpm
@ 85 mph... 4th gear runs about 4000 rpm @ 80 mph...
With the 3.90 gears you can tow in 5th gear most of the time
(even on hills)... Gas mileage runs about 15.6 mpg on a 80 mph cruise
(I did Vegas to San Diego @ 80 mph back in September.. 5 hrs with one
stop (I left at 12 midnight, and got home at 5:10 am)..
..Sam '95 SLT
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