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Author
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Topic: Auto trans question,idle in neutral or drive ?
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 07-25-2003 05:03 PM
   
Is it better to let the car idle in Neutral or Drive while sitting at a stop light or in traffic?
Does it wear the trans down more quick to shift it in and out of drive like that?
Just alittle debate I have going with a few people.------------------
SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. https://mustangsandmore.com/ubb/Fastymz.html
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adragon8u
Gearhead Posts: 4857
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 07-25-2003 05:26 PM
I seem to remember reading about this debate awhile back. if I remember correctly, if it's a stick, then take it out of gear, if it's an auto, leave it in gear.
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V8 Thumper
Gearhead Posts: 4376
From: Arizona
Registered: Dec 2001
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posted 07-25-2003 10:14 PM
At idle and in gear, the converter is sliping. While this generates quite a bit of heat, it dosen't hurt the transmission or converter (that's what trans coolers are for). Looooooooong periods of time may start to break down the ATF if anything, shortening your trans service interval.------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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V8 Thumper
Gearhead Posts: 4376
From: Arizona
Registered: Dec 2001
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posted 07-25-2003 10:16 PM
Just a side note, 25000 miles max in between trans services is recommended. The way we drive    , once a year wouldn't hurt  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html [This message has been edited by V8 Thumper (edited 07-25-2003).]
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steve'66
Gearhead Posts: 8796
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-25-2003 10:48 PM
Ron,It really depends on your cam and converter selection. For instance a stock converter that wants to stall at 1600 rpm coupled with a cam that wants to idle at 1200 rpm. That's a crappy mismatch and it would have to be popped into neutral at every stop. If the car doesn't try to go at a stop, you should leave it in gear. If you have to fight the brake peddle to keep it at a stop, you need a looser converter. SteveW
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 07-26-2003 01:41 AM
Thanks guys thats kinda what I was thinking.
My car has no problem in gear at idle.I have had cars before where you feel like you need to grab on to the light poll to keep you from inching forward.
My converter 2200-2400rpm and I idle at 750 in gear.Todd 25,000 miles that would take me about 12 years. 
I get mine serviced once a year. ------------------
SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. https://mustangsandmore.com/ubb/Fastymz.html
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V8 Thumper
Gearhead Posts: 4376
From: Arizona
Registered: Dec 2001
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posted 07-26-2003 01:58 AM
Hey, isn't it past your bedtime? ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 07-26-2003 02:24 AM
Is this the only time of the day they let you on here any more. ------------------
SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. https://mustangsandmore.com/ubb/Fastymz.html
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Tea'sGrabber
Gearhead Posts: 276
From: Seattle, Wash.
Registered: Feb 2003
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posted 07-26-2003 10:35 AM
It does no harm at all to pop it into neutral. It will keep your motor from loading up.. Jim at JPT told me to pop it into neutral when I'm street driving my car.Less stress on the convertor. I have alot bigger cam and convertor than you... I idle at 1400 in gear and 1900 in neutral. Been doing this for 7 years with this trans and convertor... Probably just the QUALITY of JPT'S stuff!!!!!------------------
Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.
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Fastback68
Gearhead Posts: 3053
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 07-28-2003 05:12 AM
Ol' timers I talk to all say old American autos should be popped into neutral at the stop light. Leaving it in gear is something only newer cars don't mind.
Just passing on the info to confuse you
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SteveLaRiviere
Administrator Posts: 42859
From: Saco, Maine
Registered: May 99
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posted 07-28-2003 07:00 PM
quote:
Originally posted by Fastback68:
Ol' timers I talk to all say old American autos should be popped into neutral at the stop light.
Maybe the ones from the '50s... ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
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