Ferrari Mailing List: Fw: Fw: NFC AT ALL!!! Automatic shifting in a GM

[jimshadow (jimshadow]

From ListLurker Chuck... 

FWIW, YMMV 

Jim 
Sent from my BlackBerry® wireless device

-----Original Message-----
From: cmidgett [at] inkonit.com

Date: Tue, 17 Jun 2008 12:57:07 
To:jimshadow [at] verizon.net
Subject: Re: Fw: [Ferrari] NFC AT ALL!!!  Automatic shifting in a GM


There may be *some* truth in it. 
A GM transmission likes to hunt a lot.  If you're right on the edge, it will 
shift from 3rd to 4th and back and forth. 
My Acura will lock up the convertor around that speed.  If you are going 55 and 
lift off the gas, it stays locked.  When you reapply, unless you give it MORE 
gas, it stays locked.  A GM on the other hand, will disengage the converter 
when you lift, lock again after you reapply the gas, then back and forth.  In 
traffic on the highway, I think it's quit annoying. 
Some GM transmissions (later ones) lock up in 3rd as well, so their theory 
wouldn't apply. 
But with the '86, it would keep the lockup from occurring until after 45.  But 
you also keep it out of 4th, which would use more gas. 
The best advice is this:  Don't buy a GM. 
 
 
 
 
 
 
 jimshadow [at] verizon.net 
06/17/2008 12:39 PM 
 
Please respond to
 jimshadow [at] verizon.net 
 
 
To "cmidgett [at] inkonit.com" <cmidgett [at] inkonit.com> 
 
cc 
 
Subject Fw: [Ferrari] NFC AT ALL!!!  Automatic shifting in a GM 
 
 
 
 
 
Thoughts??
 Sent from my BlackBerry® wireless device
 
 -----Original Message-----
 From: LtWacko [at] aol.com
 
 Date: Tue, 17 Jun 2008 16:11:57 
 To:JIM <jimshadow [at] verizon.net>
 Cc:The FerrariList <ferrari [at] ferrarilist.com>
 Subject: [Ferrari] NFC AT ALL!!!  Automatic shifting in a GM
 
 
 Again, NO Ferrari content but I figured I could get an answer from you  
 guys...
 
 I was riding in a 1996 Bonneville with a female friend.  While  driving, she 
 would start in "D".  When we got up to speed (45mph), she  would "shift" the 
 car into "D overdrive".  I said "what are you  doing?"  She said her long-time 
 former ex-boyfriend said that it will make  the transmission last longer.  Now 
 if it had been any other person, I would  have my doubts.  Her ex-boyfriend 
 is one hell of a driver.  Corvette  enthusiast/hobby racer and the ENTIRE 
 family was seriously involved with  the SCCA.  So, he's a car guy and it makes 
me 
 wonder if there is any truth  or what are the origins of his advice.
 
 I can sort of see some of the logic.  In the city, keeping it out of  
 overdrive keeps the torque convertor from locking up at 45 mph and shifting in 
 and 
 out of it.  Is that any good?  Bad?  More harm in shifting it  yourself?  
 Applies to GM transmissions only?  I vaguely remember this  advice being 
popular in 
 the early eighties, but I was a puppy then....   okay, not quite .  
 
 So guys, what do you think?
 
 Thanks.
 
 Rodney
 
 
 
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