I worked with this guy who used to shift his auto tranny in N while he was at a stop i asked him why he did this and all he told me was it helps the tranny can anyone conform this? Whats the benefit of shifting the tranny in "N" while at a stop other than saving your brake lights and preventing a tired foot.
Auto tranny and stoping
- Thread starter ARB1977
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This is what AAMCO says about that...
http://aamco.com/main/transmissiontips/tip_7.html
I think using a syn ATF, a tranny cooler or product like Lubegard Red is possibly a better approach.
http://aamco.com/main/transmissiontips/tip_7.html
I think using a syn ATF, a tranny cooler or product like Lubegard Red is possibly a better approach.
I think every time you engage the transmission from neutral, it wears off a few molecules of clutch material.
I like Aamco's answer.. shift out of gear if stopped for an extended period of time.
If I am stopped at a traffic light I wouldn't do it. If I am stopped for a train, I do.
It matters if it's 60 degrees out or 104 with the A/C going also.
Auxiliary transmission coolers are your tranny's best friend.
I like Aamco's answer.. shift out of gear if stopped for an extended period of time.
If I am stopped at a traffic light I wouldn't do it. If I am stopped for a train, I do.
It matters if it's 60 degrees out or 104 with the A/C going also.
Auxiliary transmission coolers are your tranny's best friend.
I wonder how AAmco defines an 'extened period of time'.
I would never overly shift the transmission. IMO, if you have to stop for an extended period, find a parking spot and go get yourself a coffee.
If transmission temperature is an issue, upgrade the cooling.
Yep, constant shifting between neutral and drive will cause excessive wear. And, Aamco will love to rebuild your transmission when those clutches wear out.
I would never overly shift the transmission. IMO, if you have to stop for an extended period, find a parking spot and go get yourself a coffee.
If transmission temperature is an issue, upgrade the cooling.
Yep, constant shifting between neutral and drive will cause excessive wear. And, Aamco will love to rebuild your transmission when those clutches wear out.
By that logic, everytime a driver presses the brake pedal, a few molecules of brake lining wears off, too. Hint: It's only true (in either case) if the wheels are moving or are allowed to move during application. The "apparent" car movement, presuming the service brakes are firmly applied, when engaging a drive gear from neutral, is merely torque wrap-up from the engine rocking on its mounts.
h-m-m-m.. I'll have to give it some more thought, and maybe dig out a transmission hydraulic circuit diagram.
Seems to me though that I can't rev up my engine and pull it into drive without causing slipping on my clutches (or bands) just because I have the brakes set and the car doesn't actually roll.
Seems like whenever the clutches are applied and bring two parts into motion together by friction (or stop motion and hold) that there will be some wear..
Unlike the brake pedal, the parts inside the transmission are moving; they are components of planetary gearsets, allowed to move, or locked together, or locked to the case by the clutches and bands.
Anyway, I'll think it over some more. Thanks.
I usually just leave 'er in drive when stopped for a train or a long stop light. I figure it's less wear on those clutches than shifting. I have an aux AT cooler installed and a temp gauge and it's usually at 150 deg. F. or below.
Unless for some reason as Ray stated there is no wear as long the brakes are full on when shifting. But isn't the 1-x clutch essentially applying between the rotating input shaft or whatever and the stopped output shaft?
A guy I used to work with said he shifted to neutral even at stop signs because otherwise "...you have all those gears and stuff in there that are trying to turn but they can't."
Unless for some reason as Ray stated there is no wear as long the brakes are full on when shifting. But isn't the 1-x clutch essentially applying between the rotating input shaft or whatever and the stopped output shaft?
A guy I used to work with said he shifted to neutral even at stop signs because otherwise "...you have all those gears and stuff in there that are trying to turn but they can't."
Interesting points ive never shifted in "N" in traffic or when im at a stop but it does make sense when at a stand still for long periods of time but whats considered long periods. Ive got synthetic atf with a tranny cooler and a remote tranny filter with a filter mag.
If the light just turned red at a long light, I will sometimes set the parking brake and shift into N, mostly to avoid burning up my brake lights. Also, the engine seems slightly happier with a tiny load removed from it. But I will acknowledge that this practice may not ultimately be what's best for the AT, because of the extra wear from switching from D to N and back.
My trans temp doesnt change much while sitting in traffic so if the temp doesnt change all that much then i guess there is no need to worry.
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