First automatic
11-03-2005, 11:27 AM
#91
Guest
Posts: n/a
Re: First automatic
If you think about it your first gear ratio is about 3:1, your transfer case
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
11-03-2005, 11:29 AM
#92
Guest
Posts: n/a
Re: First automatic
Is this really a Tiptronic Transmission (Porsche design used found in Audis)
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
11-03-2005, 11:29 AM
#93
Guest
Posts: n/a
Re: First automatic
Is this really a Tiptronic Transmission (Porsche design used found in Audis)
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
11-03-2005, 11:29 AM
#94
Guest
Posts: n/a
Re: First automatic
Is this really a Tiptronic Transmission (Porsche design used found in Audis)
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
or just another "sequential shifter"?
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
11-03-2005, 12:00 PM
#95
Guest
Posts: n/a
Re: First automatic
"Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
11-03-2005, 12:00 PM
#96
Guest
Posts: n/a
Re: First automatic
"Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
11-03-2005, 12:00 PM
#97
Guest
Posts: n/a
Re: First automatic
"Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
> Snip sensible analysis of drive mechanics ...
> ...
> Why would you not expect a jolt?
Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
there's no jolt when I let out the clutch.
I just want the computer to be better than it is. Or than I am. Thazall.
Cheers,
Fred
11-03-2005, 12:15 PM
#98
Guest
Posts: n/a
Re: First automatic
So you want it to slip on downloads into first when in 4Lo?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>
11-03-2005, 12:15 PM
#99
Guest
Posts: n/a
Re: First automatic
So you want it to slip on downloads into first when in 4Lo?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>
11-03-2005, 12:15 PM
#100
Guest
Posts: n/a
Re: First automatic
So you want it to slip on downloads into first when in 4Lo?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Fred Klingener" <gigabitbucket@brockeng.com> wrote in message
news:smraf.8971$Lv.1006@newssvr24.news.prodigy.net ...
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:e81ce$436a3af1$4831b233$30784@FUSE.NET...
>
>> Snip sensible analysis of drive mechanics ...
>> ...
>
>> Why would you not expect a jolt?
>
> Because, when I'm driving a stick shift in 4L and I shift from 2 to 1,
> there's no jolt when I let out the clutch.
>
> I just want the computer to be better than it is. Or than I am. Thazall.
>
> Cheers,
> Fred
>
>