Ok, I've been researching which speedo gear to get for my Dana 300. I came
up with 3 different answers. I can't find the link I had to the one that
told me I needed a 34 tooth gear, but here's the links for the other two.

32 tooth gear
http://www.jeeptech.com/javaAps/Speedo.html

33 tooth gear
http://www.sierrajeep.com/speedome.htm

Any suggestions on which to go with. My gut tells me to get the 33 and sort
of split the difference.

 

Kevin,

Try the 33.

The charts told me to use a 34 tooth gear for my BFG MT 33x10.50R15
tires (nominally 32.8") and 4.10 gears. The dealers here had none in
stock so I tried a 35 tooth gear. It works pretty near perfectly for me.
Here's a pic of my GPS reading 99.1 km/h and my speedo needle just a
shade higher than 100 km/h:

http://xjeep.dyndns.org/gps.jpg

Is this the chart that told you to use 34?:

http://www.raingler.com/jeepReference/speedoChart.html

Tells me I need 36 teeth whereas 35 is actually best. Tells you to use
34 and therefore confirms that you should try 33.

Steve
http://xjeep.dyndns.org


Kevin S wrote:
> Ok, I've been researching which speedo gear to get for my Dana 300. I came
> up with 3 different answers. I can't find the link I had to the one that
> told me I needed a 34 tooth gear, but here's the links for the other two.
>
> 32 tooth gear
> http://www.jeeptech.com/javaAps/Speedo.html
>
> 33 tooth gear
> http://www.sierrajeep.com/speedome.htm
>
> Any suggestions on which to go with. My gut tells me to get the 33 and sort
> of split the difference.

 

Kevin,

Try the 33.

The charts told me to use a 34 tooth gear for my BFG MT 33x10.50R15
tires (nominally 32.8") and 4.10 gears. The dealers here had none in
stock so I tried a 35 tooth gear. It works pretty near perfectly for me.
Here's a pic of my GPS reading 99.1 km/h and my speedo needle just a
shade higher than 100 km/h:

http://xjeep.dyndns.org/gps.jpg

Is this the chart that told you to use 34?:

http://www.raingler.com/jeepReference/speedoChart.html

Tells me I need 36 teeth whereas 35 is actually best. Tells you to use
34 and therefore confirms that you should try 33.

Steve
http://xjeep.dyndns.org


Kevin S wrote:
> Ok, I've been researching which speedo gear to get for my Dana 300. I came
> up with 3 different answers. I can't find the link I had to the one that
> told me I needed a 34 tooth gear, but here's the links for the other two.
>
> 32 tooth gear
> http://www.jeeptech.com/javaAps/Speedo.html
>
> 33 tooth gear
> http://www.sierrajeep.com/speedome.htm
>
> Any suggestions on which to go with. My gut tells me to get the 33 and sort
> of split the difference.

 

Kevin,

Try the 33.

The charts told me to use a 34 tooth gear for my BFG MT 33x10.50R15
tires (nominally 32.8") and 4.10 gears. The dealers here had none in
stock so I tried a 35 tooth gear. It works pretty near perfectly for me.
Here's a pic of my GPS reading 99.1 km/h and my speedo needle just a
shade higher than 100 km/h:

http://xjeep.dyndns.org/gps.jpg

Is this the chart that told you to use 34?:

http://www.raingler.com/jeepReference/speedoChart.html

Tells me I need 36 teeth whereas 35 is actually best. Tells you to use
34 and therefore confirms that you should try 33.

Steve
http://xjeep.dyndns.org


Kevin S wrote:
> Ok, I've been researching which speedo gear to get for my Dana 300. I came
> up with 3 different answers. I can't find the link I had to the one that
> told me I needed a 34 tooth gear, but here's the links for the other two.
>
> 32 tooth gear
> http://www.jeeptech.com/javaAps/Speedo.html
>
> 33 tooth gear
> http://www.sierrajeep.com/speedome.htm
>
> Any suggestions on which to go with. My gut tells me to get the 33 and sort
> of split the difference.

 

> Try the 33.

Unless someone convinces me otherwise I think I'll probably go with the 33.

> Is this the chart that told you to use 34?:
> http://www.raingler.com/jeepReference/speedoChart.html

That looks familiar, but it's for a TJ and therefore I assume different.

 

> Try the 33.

Unless someone convinces me otherwise I think I'll probably go with the 33.

> Is this the chart that told you to use 34?:
> http://www.raingler.com/jeepReference/speedoChart.html

That looks familiar, but it's for a TJ and therefore I assume different.

 

> Try the 33.

Unless someone convinces me otherwise I think I'll probably go with the 33.

> Is this the chart that told you to use 34?:
> http://www.raingler.com/jeepReference/speedoChart.html

That looks familiar, but it's for a TJ and therefore I assume different.

 

Should be the same...... "should be"

You know the more correct way to figure it out is; get a GPS and take speed
readings from both the GPS and speedo at different speeds. Figure out the
percentage off the gauge is. Then remove the old gear and count the teeth.
You should be able to get a new gear that is really close.

On another note, I have seen people list their speedo gear sizes and even
having 8" rims versus 10" rims makes a difference in the gears.

--James

"Kevin S" <ksperle@nospam.hotmail.com> wrote in message
news:mkIZc.159$cV5.40581@news.uswest.net...
>> Try the 33.
>
> Unless someone convinces me otherwise I think I'll probably go with the
> 33.
>
>> Is this the chart that told you to use 34?:
>> http://www.raingler.com/jeepReference/speedoChart.html
>
> That looks familiar, but it's for a TJ and therefore I assume different.
>
>

 

Should be the same...... "should be"

You know the more correct way to figure it out is; get a GPS and take speed
readings from both the GPS and speedo at different speeds. Figure out the
percentage off the gauge is. Then remove the old gear and count the teeth.
You should be able to get a new gear that is really close.

On another note, I have seen people list their speedo gear sizes and even
having 8" rims versus 10" rims makes a difference in the gears.

--James

"Kevin S" <ksperle@nospam.hotmail.com> wrote in message
news:mkIZc.159$cV5.40581@news.uswest.net...
>> Try the 33.
>
> Unless someone convinces me otherwise I think I'll probably go with the
> 33.
>
>> Is this the chart that told you to use 34?:
>> http://www.raingler.com/jeepReference/speedoChart.html
>
> That looks familiar, but it's for a TJ and therefore I assume different.
>
>

 

Should be the same...... "should be"

You know the more correct way to figure it out is; get a GPS and take speed
readings from both the GPS and speedo at different speeds. Figure out the
percentage off the gauge is. Then remove the old gear and count the teeth.
You should be able to get a new gear that is really close.

On another note, I have seen people list their speedo gear sizes and even
having 8" rims versus 10" rims makes a difference in the gears.

--James

"Kevin S" <ksperle@nospam.hotmail.com> wrote in message
news:mkIZc.159$cV5.40581@news.uswest.net...
>> Try the 33.
>
> Unless someone convinces me otherwise I think I'll probably go with the
> 33.
>
>> Is this the chart that told you to use 34?:
>> http://www.raingler.com/jeepReference/speedoChart.html
>
> That looks familiar, but it's for a TJ and therefore I assume different.
>
>