THanks for the info steve.
How about more info on a shift kit; know nothing about them.
Cory
--- Jetmugg@aol.com wrote:
>
>
> Cory:
> Those 31" tires in combination with the 3.55
> gears give an "effective"
> gear ratio of 3.22, as compared with the standard
> size of 235/70 tires and a
> 3.55 ratio. If you changed to 3.90 gears, that
> would give an evvective ratio
> of 3.56, which would be very close to the standard
> setup of 235/70's and the
> 3.55 ratio. It seems to me that the combination of
> the large tires and 3.55
> gears are what is causing you the majority of the
> problems when towing large
> loads. I currently have 3.55's and 225/70 tires.
> This gives me an
> "effective" ratio of 3.58.
> Example - if you and I were pulling identical
> trailers, both with our
> current setups, your truck would be acting like it
> has 3.22 gears, and mine
> like it has 3.58 gears. It's not difficult to see
> that the 3.58 effective
> ratio is the preferred one for towing. As far as
> the manual/automatic, many
> people prefer automatics for towing, especially when
> equipped with a shift
> kit and/or heavy duty transmission cooler.
> IMHO, the best thing you could do to improve
> towing performance would be
> to get a set of 3.90's for the front and rear.
> 4.10's would be even better
> if they are available.
>
> SteveM.
>
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