twaldron

Tracie wrote:

> On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
> <LWBillHug...@------.net> wrote:
>
>> Doesn't your Rubicon automatically correct for tire size? Probably by
>>this '06 it also measures the distance from the ground.
>> God Bless America, Bill O|||||||O
>>mailto:LW------...@aol.comhttp://www.----------.com/
>>
>>"twaldron" <d...@hairsproutingbunions.com> wrote in message
>>
>>news:WcxHi.1705$ec2.502@trnddc03...
>>
>>
>>
>>
>>>Your minimal tire size increase likely made your speedo/odo more
>>>accurate as they tend to read high from the manufacturer. That way
>>>warranties expire sooner and manufacturers save money. I'd bet you are
>>>very close now. For fuel economy, use the highest gear you can while
>>>staying in the power band (not lugging). Lugging will become immediately
>>>apparent and you do it by feel, not by someone telling you what RPM to
>>>run. If you shift into too high a gear, you will notice a power response
>>>loss and ultimately your engine will lug. Downshift.
>>
>>>tw
>>
>>--
>>Posted via a free Usenet account fromhttp://www.teranews.com
>
>
> Well, I do have an appt at the dealership tomorrow around 5 pm
> (eastern time). When I find out whether or not my speedo is right on
> or off a few mph, I will certainly post the results to let you all
> know. In the meantime, I really don't have a lugging issue or a power
> loss with the 3.07s and 31s. I can start up a moderate sized hill
> doing 65 (according to the speedometer) in 5th gear, and not have to
> stomp the gas pedal to continue going up the hill at a nice pace. I
> am wondering if the spec sheet on my jeep is wrong, and I actually
> have 3.73s. I will look at the rear diff case tonight and see what
> the stamp says.
>

Are you making a special trip to the dealer to check your speedo??

tw

jeff

Tracie wrote:
> Hello all. I have a 2006 Wrangler X with 6 speed manual tranny, 3.07
> gearing, and D30 front/35 rear. I recently upgraded my tires from the
> stock 215/75/15 to 31/10.5/15 BFG All Terrain T/A KO. I am looking
> for a reliable way to tell if my speedometer is off at all with the
> tire upgrade. I do not have access to a GPS system. What I HAVE done
> is to use the tripometer (with tenths), and hold steady at 60 mph (my
> speedometer said 60) for one mile while watching my clock. I am
> EXTREMELY close to going 1 mile in 1 minute by using this method. Is
> this reliable to tell whether or not my speedometer is dead on? I
> have NOT changed the speedometer gear yet, or had the computer changed
> to reflect the larger sized tires. Also, I am not using my OD (6th)
> much on the highway, but when I get up to 65 (the speedometer says
> 65), I am running at about 2500 rpms in 5th. Is this bad, or should I
> be shifting into the OD (6th)? I do fine with 1st through 5th. Just
> not sure what speed or what rpms I should be using 6th. Any help is
> really appreciated.
>
Borrow a handheld gps and verify your speed.

--
jeff

jeff

Tracie wrote:
> Hello all. I have a 2006 Wrangler X with 6 speed manual tranny, 3.07
> gearing, and D30 front/35 rear. I recently upgraded my tires from the
> stock 215/75/15 to 31/10.5/15 BFG All Terrain T/A KO. I am looking
> for a reliable way to tell if my speedometer is off at all with the
> tire upgrade. I do not have access to a GPS system. What I HAVE done
> is to use the tripometer (with tenths), and hold steady at 60 mph (my
> speedometer said 60) for one mile while watching my clock. I am
> EXTREMELY close to going 1 mile in 1 minute by using this method. Is
> this reliable to tell whether or not my speedometer is dead on? I
> have NOT changed the speedometer gear yet, or had the computer changed
> to reflect the larger sized tires. Also, I am not using my OD (6th)
> much on the highway, but when I get up to 65 (the speedometer says
> 65), I am running at about 2500 rpms in 5th. Is this bad, or should I
> be shifting into the OD (6th)? I do fine with 1st through 5th. Just
> not sure what speed or what rpms I should be using 6th. Any help is
> really appreciated.
>
Borrow a handheld gps and verify your speed.

--
jeff

jeff

Tracie wrote:
> Hello all. I have a 2006 Wrangler X with 6 speed manual tranny, 3.07
> gearing, and D30 front/35 rear. I recently upgraded my tires from the
> stock 215/75/15 to 31/10.5/15 BFG All Terrain T/A KO. I am looking
> for a reliable way to tell if my speedometer is off at all with the
> tire upgrade. I do not have access to a GPS system. What I HAVE done
> is to use the tripometer (with tenths), and hold steady at 60 mph (my
> speedometer said 60) for one mile while watching my clock. I am
> EXTREMELY close to going 1 mile in 1 minute by using this method. Is
> this reliable to tell whether or not my speedometer is dead on? I
> have NOT changed the speedometer gear yet, or had the computer changed
> to reflect the larger sized tires. Also, I am not using my OD (6th)
> much on the highway, but when I get up to 65 (the speedometer says
> 65), I am running at about 2500 rpms in 5th. Is this bad, or should I
> be shifting into the OD (6th)? I do fine with 1st through 5th. Just
> not sure what speed or what rpms I should be using 6th. Any help is
> really appreciated.
>
Borrow a handheld gps and verify your speed.

--
jeff

jeff

Tracie wrote:
> Hello all. I have a 2006 Wrangler X with 6 speed manual tranny, 3.07
> gearing, and D30 front/35 rear. I recently upgraded my tires from the
> stock 215/75/15 to 31/10.5/15 BFG All Terrain T/A KO. I am looking
> for a reliable way to tell if my speedometer is off at all with the
> tire upgrade. I do not have access to a GPS system. What I HAVE done
> is to use the tripometer (with tenths), and hold steady at 60 mph (my
> speedometer said 60) for one mile while watching my clock. I am
> EXTREMELY close to going 1 mile in 1 minute by using this method. Is
> this reliable to tell whether or not my speedometer is dead on? I
> have NOT changed the speedometer gear yet, or had the computer changed
> to reflect the larger sized tires. Also, I am not using my OD (6th)
> much on the highway, but when I get up to 65 (the speedometer says
> 65), I am running at about 2500 rpms in 5th. Is this bad, or should I
> be shifting into the OD (6th)? I do fine with 1st through 5th. Just
> not sure what speed or what rpms I should be using 6th. Any help is
> really appreciated.
>
Borrow a handheld gps and verify your speed.

--
jeff

Tracie

On Sep 17, 6:49 pm, twaldron <d...@hairsproutingbunions.com> wrote:
> Tracie wrote:
> > On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
> > <LWBillHug...@------.net> wrote:
>
> >> Doesn't your Rubicon automatically correct for tire size? Probably by
> >>this '06 it also measures the distance from the ground.
> >> God Bless America, Bill O|||||||O
> >>mailto:LW------...@aol.comhttp://www.----------.com/
>
> >>"twaldron" <d...@hairsproutingbunions.com> wrote in message
>
> >>news:WcxHi.1705$ec2.502@trnddc03...
>
> >>>Your minimal tire size increase likely made your speedo/odo more
> >>>accurate as they tend to read high from the manufacturer. That way
> >>>warranties expire sooner and manufacturers save money. I'd bet you are
> >>>very close now. For fuel economy, use the highest gear you can while
> >>>staying in the power band (not lugging). Lugging will become immediately
> >>>apparent and you do it by feel, not by someone telling you what RPM to
> >>>run. If you shift into too high a gear, you will notice a power response
> >>>loss and ultimately your engine will lug. Downshift.
>
> >>>tw
>
> >>--
> >>Posted via a free Usenet account fromhttp://www.teranews.com
>
> > Well, I do have an appt at the dealership tomorrow around 5 pm
> > (eastern time). When I find out whether or not my speedo is right on
> > or off a few mph, I will certainly post the results to let you all
> > know. In the meantime, I really don't have a lugging issue or a power
> > loss with the 3.07s and 31s. I can start up a moderate sized hill
> > doing 65 (according to the speedometer) in 5th gear, and not have to
> > stomp the gas pedal to continue going up the hill at a nice pace. I
> > am wondering if the spec sheet on my jeep is wrong, and I actually
> > have 3.73s. I will look at the rear diff case tonight and see what
> > the stamp says.
>
> Are you making a special trip to the dealer to check your speedo??
>
> tw- Hide quoted text -
>
> - Show quoted text -


Not really. I have had this appt scheduled for a few days now. I am
not really good at some things when it comes to this stuff. However,
I did try the measured mile trick on the way home tonight, and used
the formula that someone posted here earlier (3600/time it takes to go
1 mile) = actual speed. When my speedometer reads 60, it took me 54
seconds to go 1 mile. Hence I am assuming my actual speed is
approximately 66.5 mph (3600/54=66.6).

As for the 3.73s, no such luck. : ( I am stuck with the 3.07s.
Although as I mentioned earlier, it's really not that bad. At least
not as bad as I had expected. There is a noticeable difference from
the stock sized tires, but I really don't notice it until I get into
5th gear. Then again, before this 6 speed, I was used to driving a 5
speed anyway. And finally, there's the great debate of whether or not
to use 6th gear and if so, at what speed/rpm.

One thing.....what is engine pinging and what does it sound like? I
have a 'funny' noise that my jeep makes (seems to be coming from the
passenger side) while going uphill. To me, it sounds like keys
jingling very softly and intermittently. It never happened (that I
remember) prior to the installation of the bigger tires. The engine
is not skipping, sputtering, or seem to be lugging at all when this
noise occurs. It usually starts right at the beginning of a moderate
sized hill and continues intermittently until I get to the top of the
hill. And it NEVER happens when the engine is cold (first 30-45
minutes of driving hills or not) or while going downhill. I don't
know if this makes a difference, but I have been using 87 octane fuel
since I bought it new in November of 2006. Just to see if it made a
difference, I filled her up with 89 octane today. Gonna run her a
couple of days and see if I still notice this noise.

Tracie

On Sep 17, 6:49 pm, twaldron <d...@hairsproutingbunions.com> wrote:
> Tracie wrote:
> > On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
> > <LWBillHug...@------.net> wrote:
>
> >> Doesn't your Rubicon automatically correct for tire size? Probably by
> >>this '06 it also measures the distance from the ground.
> >> God Bless America, Bill O|||||||O
> >>mailto:LW------...@aol.comhttp://www.----------.com/
>
> >>"twaldron" <d...@hairsproutingbunions.com> wrote in message
>
> >>news:WcxHi.1705$ec2.502@trnddc03...
>
> >>>Your minimal tire size increase likely made your speedo/odo more
> >>>accurate as they tend to read high from the manufacturer. That way
> >>>warranties expire sooner and manufacturers save money. I'd bet you are
> >>>very close now. For fuel economy, use the highest gear you can while
> >>>staying in the power band (not lugging). Lugging will become immediately
> >>>apparent and you do it by feel, not by someone telling you what RPM to
> >>>run. If you shift into too high a gear, you will notice a power response
> >>>loss and ultimately your engine will lug. Downshift.
>
> >>>tw
>
> >>--
> >>Posted via a free Usenet account fromhttp://www.teranews.com
>
> > Well, I do have an appt at the dealership tomorrow around 5 pm
> > (eastern time). When I find out whether or not my speedo is right on
> > or off a few mph, I will certainly post the results to let you all
> > know. In the meantime, I really don't have a lugging issue or a power
> > loss with the 3.07s and 31s. I can start up a moderate sized hill
> > doing 65 (according to the speedometer) in 5th gear, and not have to
> > stomp the gas pedal to continue going up the hill at a nice pace. I
> > am wondering if the spec sheet on my jeep is wrong, and I actually
> > have 3.73s. I will look at the rear diff case tonight and see what
> > the stamp says.
>
> Are you making a special trip to the dealer to check your speedo??
>
> tw- Hide quoted text -
>
> - Show quoted text -


Not really. I have had this appt scheduled for a few days now. I am
not really good at some things when it comes to this stuff. However,
I did try the measured mile trick on the way home tonight, and used
the formula that someone posted here earlier (3600/time it takes to go
1 mile) = actual speed. When my speedometer reads 60, it took me 54
seconds to go 1 mile. Hence I am assuming my actual speed is
approximately 66.5 mph (3600/54=66.6).

As for the 3.73s, no such luck. : ( I am stuck with the 3.07s.
Although as I mentioned earlier, it's really not that bad. At least
not as bad as I had expected. There is a noticeable difference from
the stock sized tires, but I really don't notice it until I get into
5th gear. Then again, before this 6 speed, I was used to driving a 5
speed anyway. And finally, there's the great debate of whether or not
to use 6th gear and if so, at what speed/rpm.

One thing.....what is engine pinging and what does it sound like? I
have a 'funny' noise that my jeep makes (seems to be coming from the
passenger side) while going uphill. To me, it sounds like keys
jingling very softly and intermittently. It never happened (that I
remember) prior to the installation of the bigger tires. The engine
is not skipping, sputtering, or seem to be lugging at all when this
noise occurs. It usually starts right at the beginning of a moderate
sized hill and continues intermittently until I get to the top of the
hill. And it NEVER happens when the engine is cold (first 30-45
minutes of driving hills or not) or while going downhill. I don't
know if this makes a difference, but I have been using 87 octane fuel
since I bought it new in November of 2006. Just to see if it made a
difference, I filled her up with 89 octane today. Gonna run her a
couple of days and see if I still notice this noise.

Tracie

On Sep 17, 6:49 pm, twaldron <d...@hairsproutingbunions.com> wrote:
> Tracie wrote:
> > On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
> > <LWBillHug...@------.net> wrote:
>
> >> Doesn't your Rubicon automatically correct for tire size? Probably by
> >>this '06 it also measures the distance from the ground.
> >> God Bless America, Bill O|||||||O
> >>mailto:LW------...@aol.comhttp://www.----------.com/
>
> >>"twaldron" <d...@hairsproutingbunions.com> wrote in message
>
> >>news:WcxHi.1705$ec2.502@trnddc03...
>
> >>>Your minimal tire size increase likely made your speedo/odo more
> >>>accurate as they tend to read high from the manufacturer. That way
> >>>warranties expire sooner and manufacturers save money. I'd bet you are
> >>>very close now. For fuel economy, use the highest gear you can while
> >>>staying in the power band (not lugging). Lugging will become immediately
> >>>apparent and you do it by feel, not by someone telling you what RPM to
> >>>run. If you shift into too high a gear, you will notice a power response
> >>>loss and ultimately your engine will lug. Downshift.
>
> >>>tw
>
> >>--
> >>Posted via a free Usenet account fromhttp://www.teranews.com
>
> > Well, I do have an appt at the dealership tomorrow around 5 pm
> > (eastern time). When I find out whether or not my speedo is right on
> > or off a few mph, I will certainly post the results to let you all
> > know. In the meantime, I really don't have a lugging issue or a power
> > loss with the 3.07s and 31s. I can start up a moderate sized hill
> > doing 65 (according to the speedometer) in 5th gear, and not have to
> > stomp the gas pedal to continue going up the hill at a nice pace. I
> > am wondering if the spec sheet on my jeep is wrong, and I actually
> > have 3.73s. I will look at the rear diff case tonight and see what
> > the stamp says.
>
> Are you making a special trip to the dealer to check your speedo??
>
> tw- Hide quoted text -
>
> - Show quoted text -


Not really. I have had this appt scheduled for a few days now. I am
not really good at some things when it comes to this stuff. However,
I did try the measured mile trick on the way home tonight, and used
the formula that someone posted here earlier (3600/time it takes to go
1 mile) = actual speed. When my speedometer reads 60, it took me 54
seconds to go 1 mile. Hence I am assuming my actual speed is
approximately 66.5 mph (3600/54=66.6).

As for the 3.73s, no such luck. : ( I am stuck with the 3.07s.
Although as I mentioned earlier, it's really not that bad. At least
not as bad as I had expected. There is a noticeable difference from
the stock sized tires, but I really don't notice it until I get into
5th gear. Then again, before this 6 speed, I was used to driving a 5
speed anyway. And finally, there's the great debate of whether or not
to use 6th gear and if so, at what speed/rpm.

One thing.....what is engine pinging and what does it sound like? I
have a 'funny' noise that my jeep makes (seems to be coming from the
passenger side) while going uphill. To me, it sounds like keys
jingling very softly and intermittently. It never happened (that I
remember) prior to the installation of the bigger tires. The engine
is not skipping, sputtering, or seem to be lugging at all when this
noise occurs. It usually starts right at the beginning of a moderate
sized hill and continues intermittently until I get to the top of the
hill. And it NEVER happens when the engine is cold (first 30-45
minutes of driving hills or not) or while going downhill. I don't
know if this makes a difference, but I have been using 87 octane fuel
since I bought it new in November of 2006. Just to see if it made a
difference, I filled her up with 89 octane today. Gonna run her a
couple of days and see if I still notice this noise.

Tracie

On Sep 17, 6:49 pm, twaldron <d...@hairsproutingbunions.com> wrote:
> Tracie wrote:
> > On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
> > <LWBillHug...@------.net> wrote:
>
> >> Doesn't your Rubicon automatically correct for tire size? Probably by
> >>this '06 it also measures the distance from the ground.
> >> God Bless America, Bill O|||||||O
> >>mailto:LW------...@aol.comhttp://www.----------.com/
>
> >>"twaldron" <d...@hairsproutingbunions.com> wrote in message
>
> >>news:WcxHi.1705$ec2.502@trnddc03...
>
> >>>Your minimal tire size increase likely made your speedo/odo more
> >>>accurate as they tend to read high from the manufacturer. That way
> >>>warranties expire sooner and manufacturers save money. I'd bet you are
> >>>very close now. For fuel economy, use the highest gear you can while
> >>>staying in the power band (not lugging). Lugging will become immediately
> >>>apparent and you do it by feel, not by someone telling you what RPM to
> >>>run. If you shift into too high a gear, you will notice a power response
> >>>loss and ultimately your engine will lug. Downshift.
>
> >>>tw
>
> >>--
> >>Posted via a free Usenet account fromhttp://www.teranews.com
>
> > Well, I do have an appt at the dealership tomorrow around 5 pm
> > (eastern time). When I find out whether or not my speedo is right on
> > or off a few mph, I will certainly post the results to let you all
> > know. In the meantime, I really don't have a lugging issue or a power
> > loss with the 3.07s and 31s. I can start up a moderate sized hill
> > doing 65 (according to the speedometer) in 5th gear, and not have to
> > stomp the gas pedal to continue going up the hill at a nice pace. I
> > am wondering if the spec sheet on my jeep is wrong, and I actually
> > have 3.73s. I will look at the rear diff case tonight and see what
> > the stamp says.
>
> Are you making a special trip to the dealer to check your speedo??
>
> tw- Hide quoted text -
>
> - Show quoted text -


Not really. I have had this appt scheduled for a few days now. I am
not really good at some things when it comes to this stuff. However,
I did try the measured mile trick on the way home tonight, and used
the formula that someone posted here earlier (3600/time it takes to go
1 mile) = actual speed. When my speedometer reads 60, it took me 54
seconds to go 1 mile. Hence I am assuming my actual speed is
approximately 66.5 mph (3600/54=66.6).

As for the 3.73s, no such luck. : ( I am stuck with the 3.07s.
Although as I mentioned earlier, it's really not that bad. At least
not as bad as I had expected. There is a noticeable difference from
the stock sized tires, but I really don't notice it until I get into
5th gear. Then again, before this 6 speed, I was used to driving a 5
speed anyway. And finally, there's the great debate of whether or not
to use 6th gear and if so, at what speed/rpm.

One thing.....what is engine pinging and what does it sound like? I
have a 'funny' noise that my jeep makes (seems to be coming from the
passenger side) while going uphill. To me, it sounds like keys
jingling very softly and intermittently. It never happened (that I
remember) prior to the installation of the bigger tires. The engine
is not skipping, sputtering, or seem to be lugging at all when this
noise occurs. It usually starts right at the beginning of a moderate
sized hill and continues intermittently until I get to the top of the
hill. And it NEVER happens when the engine is cold (first 30-45
minutes of driving hills or not) or while going downhill. I don't
know if this makes a difference, but I have been using 87 octane fuel
since I bought it new in November of 2006. Just to see if it made a
difference, I filled her up with 89 octane today. Gonna run her a
couple of days and see if I still notice this noise.

c

Tracie wrote:
> On Sep 17, 6:49 pm, twaldron <d...@hairsproutingbunions.com> wrote:
>> Tracie wrote:
>>> On Sep 17, 3:49 pm, "L.W. \(Bill\) ------ III"
>>> <LWBillHug...@------.net> wrote:
>>>> Doesn't your Rubicon automatically correct for tire size? Probably by
>>>> this '06 it also measures the distance from the ground.
>>>> God Bless America, Bill O|||||||O
>>>> mailto:LW------...@aol.comhttp://www.----------.com/
>>>> "twaldron" <d...@hairsproutingbunions.com> wrote in message
>>>> news:WcxHi.1705$ec2.502@trnddc03...
>>>>> Your minimal tire size increase likely made your speedo/odo more
>>>>> accurate as they tend to read high from the manufacturer. That way
>>>>> warranties expire sooner and manufacturers save money. I'd bet you are
>>>>> very close now. For fuel economy, use the highest gear you can while
>>>>> staying in the power band (not lugging). Lugging will become immediately
>>>>> apparent and you do it by feel, not by someone telling you what RPM to
>>>>> run. If you shift into too high a gear, you will notice a power response
>>>>> loss and ultimately your engine will lug. Downshift.
>>>>> tw
>>>> --
>>>> Posted via a free Usenet account fromhttp://www.teranews.com
>>> Well, I do have an appt at the dealership tomorrow around 5 pm
>>> (eastern time). When I find out whether or not my speedo is right on
>>> or off a few mph, I will certainly post the results to let you all
>>> know. In the meantime, I really don't have a lugging issue or a power
>>> loss with the 3.07s and 31s. I can start up a moderate sized hill
>>> doing 65 (according to the speedometer) in 5th gear, and not have to
>>> stomp the gas pedal to continue going up the hill at a nice pace. I
>>> am wondering if the spec sheet on my jeep is wrong, and I actually
>>> have 3.73s. I will look at the rear diff case tonight and see what
>>> the stamp says.
>> Are you making a special trip to the dealer to check your speedo??
>>
>> tw- Hide quoted text -
>>
>> - Show quoted text -
>
>
> Not really. I have had this appt scheduled for a few days now. I am
> not really good at some things when it comes to this stuff. However,
> I did try the measured mile trick on the way home tonight, and used
> the formula that someone posted here earlier (3600/time it takes to go
> 1 mile) = actual speed. When my speedometer reads 60, it took me 54
> seconds to go 1 mile. Hence I am assuming my actual speed is
> approximately 66.5 mph (3600/54=66.6).
>
> As for the 3.73s, no such luck. : ( I am stuck with the 3.07s.
> Although as I mentioned earlier, it's really not that bad. At least
> not as bad as I had expected. There is a noticeable difference from
> the stock sized tires, but I really don't notice it until I get into
> 5th gear. Then again, before this 6 speed, I was used to driving a 5
> speed anyway. And finally, there's the great debate of whether or not
> to use 6th gear and if so, at what speed/rpm.
>
> One thing.....what is engine pinging and what does it sound like? I
> have a 'funny' noise that my jeep makes (seems to be coming from the
> passenger side) while going uphill. To me, it sounds like keys
> jingling very softly and intermittently. It never happened (that I
> remember) prior to the installation of the bigger tires. The engine
> is not skipping, sputtering, or seem to be lugging at all when this
> noise occurs. It usually starts right at the beginning of a moderate
> sized hill and continues intermittently until I get to the top of the
> hill. And it NEVER happens when the engine is cold (first 30-45
> minutes of driving hills or not) or while going downhill. I don't
> know if this makes a difference, but I have been using 87 octane fuel
> since I bought it new in November of 2006. Just to see if it made a
> difference, I filled her up with 89 octane today. Gonna run her a
> couple of days and see if I still notice this noise.
>


The "key jingling" sound you hear is probably pinging. That is actually
a good way to describe it. I used to always tell people it sounds like
light tapping on a piece of metal with a small hammer.

Chris