Does "S" shift position have engine braking?

[6cuda61]

> This is a good explaination.
> I also think that manny means don't use the transmission to slow the vehicle from say 65 to 40, I don't think hes saying to use S to stay at
> 40mph
> ________________________________
> From: John R.Lebetski
> Sent: Thursday, July 29, 2021 9:12 AM
> To: gmclist
> Subject: [GMCnet] Re: Does "S" shift position have engine braking?
>
> TH425 has no energy saving era freewheel clutches so it is engaged in all gears, except for converter slip The friction material wear occurs
> only
> during the shift events. Once in a lower gear, there should be no friction material slip i drive it as if it were a manual in mountains. If you
> rely
> on brakes and you use them up with heat soak, then what? I choose the lower gear preemptively, then apply brakes only as needed to limit engine
> overspeed with very short applies and long off intervals. I beg to disagree with Manny here (and on disconnecting the GM designed kickdown which
> I
> have connected as stock) as overheating brakes can warp drums and rotors and break down grease leading to future fails. Remember that even Mobil
> 1
> grease is only rated to 305F by Mobil. My trans has just past 100K mark no problems.
> The long grade you speak of at 14% is a first gear grade taken below 30 MPH. In S it will run away.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
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Tried "S" to start with yesterday and it was better but on the only semi level 100 feet or so i downshifted it to "L" before the last and worst
part.....much better overall and a bit more control.

Wife says that if we are going out West next year and have to face the mountains, she wants disk brakes on the rear.....lol.

--
Rich Mondor,

Brockville, ON

77 Hughes 2600

 

[Matt Colie]

> Tried "S" to start with yesterday and it was better but on the only semi level 100 feet or so i downshifted it to "L" before the last and worst
> part.....much better overall and a bit more control.
>
> Wife says that if we are going out West next year and have to face the mountains, she wants disk brakes on the rear.....lol.

Rich,
Research this carefully. There are problems there that few suspect.
Talk to Dave Lenzi about it.
Matt
--
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

 

[6cuda61]

> > Tried "S" to start with yesterday and it was better but on the only semi level 100 feet or so i downshifted it to "L" before the last and
> > worst part.....much better overall and a bit more control.
> >
> > Wife says that if we are going out West next year and have to face the mountains, she wants disk brakes on the rear.....lol.
>
> Rich,
> Research this carefully. There are problems there that few suspect.
> Talk to Dave Lenzi about it.
> Matt

Thanks for the heads up Matt, i think everything will have pros/cons no matter how you look at it. The brakes work pretty good stock but when 20000lbs
starts pushing on a 14% grade other "things" start to pucker, if you know what i mean....lol.
--
Rich Mondor,

Brockville, ON

77 Hughes 2600