lugnut wrote:
> On Sat, 28 Jan 2006 20:20:15 GMT, "Paul O."
> <oplholik@gmail.com> wrote:
>
>> Just curious, I have never used overdrive in town, but have been wondering
>> if it makes any difference in gas mileage to speak of? Thanks.
>
>
> Leave the OD alone and let the trans do it's thing. The
> only good reason for canceling the OD is if the trans is
> "hunting" in and out of OD which is a possibility with some
> vehicles in low speed driving around the normal minimum
> upshift point for the trans.
>
> Lugnut
There is no universal answer here as it depends on the engines power
curve and your axle ratio. Some vehicles like my 89 4x4 burb will hit OD
and lockup by 35 MPH at light throttle and pull it well without
unlocking or down shifting while others will not hit OD lockup to 50 or
more. The best gage here is if your vehicle hunts a lot between OD and
drive (or locking and unlocking converter) in town, use drive in town
and save OD for highway to easy wear and tear and possible increase MPG
too.
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