-------------- Original message --------------
From: "Rob P" <fristpenny@xxxxxxxxxxx>
> I expressed interest in adding an o/d to my "feeble" small block 80's
> Imperials. First of all, there is no reason it would be a mistake. As long
> as you lower the rear gear you will end up with the best of both worlds as
> far as mpg and accelleration. I was the one that brought up the highway
> gears and stated I would be changing them. BTW, my '83 is a small block car
> and probably has more hp than 95% of the Imperials out there-it's got a
> Magnum 360. I understand where you're coming from, but you lose nothing by
> adding the o/d since the lower gears are identical just with the addition of
> 4th.
>
> Rob
>
> >From: sosmi@xxxxxxxxxxx
> >Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> >To: mailing-list@xxxxxxxxxxxxxxxx
> >Subject: Re: IML: overdrive torqueflite and stall speed
> >Date: Thu, 14 Dec 2006 01:12:15 +0000
> >
> >Interesting, but somewhat misleading. First the Lock-up converters do not
> >retrofit to 727's, the trans would not be slipping, in over-drive only the
> >torque converter, and that amount of slippage is NEVER at stall speed.It
> >would never be as much, as a car, or truck pulling a boat, or travel
> >trailer.Thats why you add trans coolers.No doubt adding the over-drive to
> >an 80's Imp would be a mistake, they were already feeble enough.Most
> >members that expressed interest in OD. have big block motors, they make
> >peak torque at 2000-2600 rpm. Peak torque, is always the best rpm to run
> >an engine at, its usually most fuel efficient too. Ya'll have a nice day,
> >Dave
> >
>
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