Re: IML: AT at stop: N or P, not D ?

["Rob P" <fristpenny@xxxxxxxxxxx>]

I believe you are supposed to idle the car in neutral because the fluid 
doesn't pump in park. At least not much.  My '83 has a 727 that has a 
modification that makes the pump run all the time. I think it's made by 
Sonnax.  I'm not sure of any drawback to this mod, but it seems universally 
loved by muscle car people.

As the trans ages it can exhibit drain back or "morning sickness" (like my 
'82) and when started cold it will take some time and excess gas pedal to 
engage a gear.  This is why you are supposed to warm the car up in neutral, 
it refills the converter and past the leaky seals.   Once they are warmed up 
they are usually fine.  I have also heard you should put the car into drive 
before engaging reverse.  This seems to lessen the hard "clunk" when first 
putting the car into "R".

I'm sure somebody like Mikey Sutton could explain this better, but plenty of 
people have acted like starting my car, running it in park for 30 seconds, 
kicking it off high idle and putting it into reverse was the equivalent of 
slamming it into park at 60 mph or doing a neutral drop from 6,500 rpm.

Rob

> From: RandalPark@xxxxxxx
> Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Subject: Re: IML: AT at stop: N or P, not D ?
> Date: Tue, 12 Jul 2005 21:04:21 -0400
>
> The last year of the drive shaft brake was 1962. There were a bunch of 
> Torqueflites built after that, and they are the ones with Park. The shop 
> manual says NOT to idle the car for long periods in Park. I guess I may be 
> mistaken about the reason why. Still, if the men who built the transmission 
> say that, I will believe them.
>
> Paul W.
>
> In an email dated 12/7/2005 6:19:43 pm GMT Daylight time, Bob Smith 
> <limoguy1950@xxxxxxxxx> writes:
>
> >If I recall correctly (and, it's been a long time), when either in Park 
> or Neutral, both the clutches and bands are released.  The only difference 
> is that if the car has a "Park" position, there is a parking pawl engaged.  
> There would be no difference in the number of parts that are moving.
> >
> >The emergency brake on Torqueflite and Powerflite equipped cars operates 
> on the driveshaft, not on the rear wheels on every one I've seen.
> >Bob Smith
> >RandalPark@xxxxxxx wrote:
> >More parts are running when the car is in Park than when it is in 
> Neutral. If the car is standing still, the brakes won't get hot. The car 
> usually could be held in place with the emergency brake, if your foot is 
> too tired to press the brake pedal during the "prolonged period of idle".
> >
> >Paul W.
> >
> >
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