Command-trac 4Hi usage questions
#11
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
You can shift in and out of 4HI as required at speeds up to 55 MPH. You
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
#12
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
You can shift in and out of 4HI as required at speeds up to 55 MPH. You
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
#13
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
You can shift in and out of 4HI as required at speeds up to 55 MPH. You
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
can safely run 4HI on short, straight stretches of high traction
surfaces (even asphalt), especially when there is loose stuff ahead to
allow unwinding.
Don't worry too much about using 4HI on anything but asphalt or
concrete. Even very hard packed dirt will allow enough wheel slip.
Steve
http://xjeep.dyndns.org
Sandstone wrote:
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
> I'm concerned about driving on hard dirt or clay roads that have
> intermittent trouble areas (e.g., deep sand or mud spots). Do I dare
> drive in 4Hi on roads like this, or are they equivalent to dry pavement
> scenarios? What are others experiences in situations like this?
>
> What about gravel roads - are they problematic in 4Hi?
>
> TIA
#14
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
I purchased a Cherokee with command trac and had the Dealer change
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
#15
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
I purchased a Cherokee with command trac and had the Dealer change
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
#16
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
I purchased a Cherokee with command trac and had the Dealer change
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
#17
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
I purchased a Cherokee with command trac and had the Dealer change
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
over to selectrac at around 30,000 mile and like the selectrac much
better. So you don't have to worry about road surface. The change
over cost was around $1,900, so you should get the selectrac option
when you purchase the car new and save yourself some money in the long
run. You are not likely to regret it even if it may mean a few more $
per month on payments.
#18
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
"Sandstone" <spambucket@infowest.com> wrote in message
news:430E7FAC.AED5F286@infowest.com...
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
Yes, there is a problem. Not an immediate problem to be sure, but a long
term problem.
The trouble is, the SelecTrac is a Full Time system, meaning it has a
differential of sorts built in. The differentials in the axles accomodate
speed differences from left to right, the differential in the tcase will
accomodate speed differences front to rear. There are inherent speed
differences because the front and rear are not geared precisely the same,
they are off by a few hundredths, but over time and distance something has
to give. When driving on dirt, or snow, the give comes from the tires
slipping on the ground, but when driving on pavement there is no slip to
speak of, and the drive chain inside the tcase stretches. This stretching is
a bad thing. A very bad thing.
No, the problem doesn't occur only when turning. It occurs worse when
turning.
#19
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
"Sandstone" <spambucket@infowest.com> wrote in message
news:430E7FAC.AED5F286@infowest.com...
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
Yes, there is a problem. Not an immediate problem to be sure, but a long
term problem.
The trouble is, the SelecTrac is a Full Time system, meaning it has a
differential of sorts built in. The differentials in the axles accomodate
speed differences from left to right, the differential in the tcase will
accomodate speed differences front to rear. There are inherent speed
differences because the front and rear are not geared precisely the same,
they are off by a few hundredths, but over time and distance something has
to give. When driving on dirt, or snow, the give comes from the tires
slipping on the ground, but when driving on pavement there is no slip to
speak of, and the drive chain inside the tcase stretches. This stretching is
a bad thing. A very bad thing.
No, the problem doesn't occur only when turning. It occurs worse when
turning.
#20
Guest
Posts: n/a
Re: Command-trac 4Hi usage questions
"Sandstone" <spambucket@infowest.com> wrote in message
news:430E7FAC.AED5F286@infowest.com...
> I'm thinking about buying a Jeep Liberty. I know Selec-Trac may be a
> better option but all the Libertys I've looked at have Command-Trac.
> Selec-Trac just rarer than hen's teeth around here. Command-Trac might
> be OK but I'm worried about the 4Hi limitations.
>
> Does the problem with 4Hi on dry pavement only occur when turning?
>
> For the sake of argument, if you *only* drive in a straight line on dry
> pavement, no matter what the speed, then is there any 4HI problem?
>
Yes, there is a problem. Not an immediate problem to be sure, but a long
term problem.
The trouble is, the SelecTrac is a Full Time system, meaning it has a
differential of sorts built in. The differentials in the axles accomodate
speed differences from left to right, the differential in the tcase will
accomodate speed differences front to rear. There are inherent speed
differences because the front and rear are not geared precisely the same,
they are off by a few hundredths, but over time and distance something has
to give. When driving on dirt, or snow, the give comes from the tires
slipping on the ground, but when driving on pavement there is no slip to
speak of, and the drive chain inside the tcase stretches. This stretching is
a bad thing. A very bad thing.
No, the problem doesn't occur only when turning. It occurs worse when
turning.