I have 3.73 on my 2000 TJ with 33" and you can really tell it when you get
in the mud, or just doing a water crossing. Need to bump mine to 4.10's or
4.56's but don't have the money now. I will do the speedo recal then, right
now I just remind myself that it is going faster than it says and add about
2% when I have to use it for mileage on expense reports.

Tom

"Rich" <harrisfam1988@verizon.net> wrote in message
news:XoJPf.1483$aF3.130@trndny02...
> Oh I totally agree with you about gear changing. My CJ7 has 33's and I'm
> running 4:10 gears. They are about as high as I'd go with 33's. 4:56 would
> be a better choice at a minimum for him. Some people have to find out for
> themselves. He will. It s funny he's a nice guy, he comes to me for advice
> all the time, but never takes it. Then finds out later I was right.... Go
> figure.
> You can lead a horse to water, but making him drink is his own decision,
> eventually he'll get thirsty though.
> Rich
>
>
> "Troy" <troy@ .> wrote in message
> news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> > He is going to have to buy a speedo gear from the dealership, according
to
> > the ring and pinion gear he already has. I used this link to figure
mine
> > out: http://www.raingler.com/tech/speedoChart.asp
> >
> > Funny thing is that the parts guy at my dealership said I'd have to
> > reflash my computer but I bought the proper speedo gear anyway (he said
it
> > wouldn't work). It does.
> >
> > I really think its a bad idea not to change the gears with that size
tire,
> > might be doable with 3.73 but my jeep had 3.07 with a manual
transmission
> > when I went to 33's and it was so bad I didn't drive it until I could
buy
> > the gears.
> >
> > Troy
> >
> >
> > "Rich" <harrisfam1988@verizon.net> wrote in message
> > news:XwIPf.1602$ky1.188@trndny06...
> >> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> >> lift it and put 35" tires on without a gear change. (not a choice I'd
> >> make but non-the less). He's wondering what he can do to recalibrate
the
> >> Speedo without going to the stealership. I'd know what to do if he had
a
> >> CJ. My guess is he needs a computer reprogramming. True?
> >> Thanks
> >> Rich
> >>
> >
> >
>
>

 

I have 3.73 on my 2000 TJ with 33" and you can really tell it when you get
in the mud, or just doing a water crossing. Need to bump mine to 4.10's or
4.56's but don't have the money now. I will do the speedo recal then, right
now I just remind myself that it is going faster than it says and add about
2% when I have to use it for mileage on expense reports.

Tom

"Rich" <harrisfam1988@verizon.net> wrote in message
news:XoJPf.1483$aF3.130@trndny02...
> Oh I totally agree with you about gear changing. My CJ7 has 33's and I'm
> running 4:10 gears. They are about as high as I'd go with 33's. 4:56 would
> be a better choice at a minimum for him. Some people have to find out for
> themselves. He will. It s funny he's a nice guy, he comes to me for advice
> all the time, but never takes it. Then finds out later I was right.... Go
> figure.
> You can lead a horse to water, but making him drink is his own decision,
> eventually he'll get thirsty though.
> Rich
>
>
> "Troy" <troy@ .> wrote in message
> news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> > He is going to have to buy a speedo gear from the dealership, according
to
> > the ring and pinion gear he already has. I used this link to figure
mine
> > out: http://www.raingler.com/tech/speedoChart.asp
> >
> > Funny thing is that the parts guy at my dealership said I'd have to
> > reflash my computer but I bought the proper speedo gear anyway (he said
it
> > wouldn't work). It does.
> >
> > I really think its a bad idea not to change the gears with that size
tire,
> > might be doable with 3.73 but my jeep had 3.07 with a manual
transmission
> > when I went to 33's and it was so bad I didn't drive it until I could
buy
> > the gears.
> >
> > Troy
> >
> >
> > "Rich" <harrisfam1988@verizon.net> wrote in message
> > news:XwIPf.1602$ky1.188@trndny06...
> >> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> >> lift it and put 35" tires on without a gear change. (not a choice I'd
> >> make but non-the less). He's wondering what he can do to recalibrate
the
> >> Speedo without going to the stealership. I'd know what to do if he had
a
> >> CJ. My guess is he needs a computer reprogramming. True?
> >> Thanks
> >> Rich
> >>
> >
> >
>
>

 

I have 3.73 on my 2000 TJ with 33" and you can really tell it when you get
in the mud, or just doing a water crossing. Need to bump mine to 4.10's or
4.56's but don't have the money now. I will do the speedo recal then, right
now I just remind myself that it is going faster than it says and add about
2% when I have to use it for mileage on expense reports.

Tom

"Rich" <harrisfam1988@verizon.net> wrote in message
news:XoJPf.1483$aF3.130@trndny02...
> Oh I totally agree with you about gear changing. My CJ7 has 33's and I'm
> running 4:10 gears. They are about as high as I'd go with 33's. 4:56 would
> be a better choice at a minimum for him. Some people have to find out for
> themselves. He will. It s funny he's a nice guy, he comes to me for advice
> all the time, but never takes it. Then finds out later I was right.... Go
> figure.
> You can lead a horse to water, but making him drink is his own decision,
> eventually he'll get thirsty though.
> Rich
>
>
> "Troy" <troy@ .> wrote in message
> news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> > He is going to have to buy a speedo gear from the dealership, according
to
> > the ring and pinion gear he already has. I used this link to figure
mine
> > out: http://www.raingler.com/tech/speedoChart.asp
> >
> > Funny thing is that the parts guy at my dealership said I'd have to
> > reflash my computer but I bought the proper speedo gear anyway (he said
it
> > wouldn't work). It does.
> >
> > I really think its a bad idea not to change the gears with that size
tire,
> > might be doable with 3.73 but my jeep had 3.07 with a manual
transmission
> > when I went to 33's and it was so bad I didn't drive it until I could
buy
> > the gears.
> >
> > Troy
> >
> >
> > "Rich" <harrisfam1988@verizon.net> wrote in message
> > news:XwIPf.1602$ky1.188@trndny06...
> >> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> >> lift it and put 35" tires on without a gear change. (not a choice I'd
> >> make but non-the less). He's wondering what he can do to recalibrate
the
> >> Speedo without going to the stealership. I'd know what to do if he had
a
> >> CJ. My guess is he needs a computer reprogramming. True?
> >> Thanks
> >> Rich
> >>
> >
> >
>
>

 

He will do the same thing you'd be doing -- switch the gear in the speed
sensor.

He ought to be able to find the speed sensor on the output of the tcase in
essentially the same place as on your CJ. The sensor spins around because it
is mounted on a gear that mates to something inside the tcase. Swap the gear
to recalibrate the speed sensor.



"Rich" <harrisfam1988@verizon.net> wrote in message
news:XwIPf.1602$ky1.188@trndny06...
> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> lift it and put 35" tires on without a gear change. (not a choice I'd make
> but non-the less). He's wondering what he can do to recalibrate the Speedo
> without going to the stealership. I'd know what to do if he had a CJ. My
> guess is he needs a computer reprogramming. True?
> Thanks
> Rich
>

 

He will do the same thing you'd be doing -- switch the gear in the speed
sensor.

He ought to be able to find the speed sensor on the output of the tcase in
essentially the same place as on your CJ. The sensor spins around because it
is mounted on a gear that mates to something inside the tcase. Swap the gear
to recalibrate the speed sensor.



"Rich" <harrisfam1988@verizon.net> wrote in message
news:XwIPf.1602$ky1.188@trndny06...
> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> lift it and put 35" tires on without a gear change. (not a choice I'd make
> but non-the less). He's wondering what he can do to recalibrate the Speedo
> without going to the stealership. I'd know what to do if he had a CJ. My
> guess is he needs a computer reprogramming. True?
> Thanks
> Rich
>

 

He will do the same thing you'd be doing -- switch the gear in the speed
sensor.

He ought to be able to find the speed sensor on the output of the tcase in
essentially the same place as on your CJ. The sensor spins around because it
is mounted on a gear that mates to something inside the tcase. Swap the gear
to recalibrate the speed sensor.



"Rich" <harrisfam1988@verizon.net> wrote in message
news:XwIPf.1602$ky1.188@trndny06...
> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> lift it and put 35" tires on without a gear change. (not a choice I'd make
> but non-the less). He's wondering what he can do to recalibrate the Speedo
> without going to the stealership. I'd know what to do if he had a CJ. My
> guess is he needs a computer reprogramming. True?
> Thanks
> Rich
>

 

He will do the same thing you'd be doing -- switch the gear in the speed
sensor.

He ought to be able to find the speed sensor on the output of the tcase in
essentially the same place as on your CJ. The sensor spins around because it
is mounted on a gear that mates to something inside the tcase. Swap the gear
to recalibrate the speed sensor.



"Rich" <harrisfam1988@verizon.net> wrote in message
news:XwIPf.1602$ky1.188@trndny06...
> I've got a neighbor who has a Rubi. 2005 I think. He's getting ready to
> lift it and put 35" tires on without a gear change. (not a choice I'd make
> but non-the less). He's wondering what he can do to recalibrate the Speedo
> without going to the stealership. I'd know what to do if he had a CJ. My
> guess is he needs a computer reprogramming. True?
> Thanks
> Rich
>

 

"Troy" <troy@ .> wrote in message
news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> He is going to have to buy a speedo gear from the dealership, according to
> the ring and pinion gear he already has. I used this link to figure mine
> out: http://www.raingler.com/tech/speedoChart.asp
>

There is no need to buyit from the dealership, any speed shop should carry
them.



> Funny thing is that the parts guy at my dealership said I'd have to
> reflash my computer but I bought the proper speedo gear anyway (he said it
> wouldn't work). It does.
>
> I really think its a bad idea not to change the gears with that size tire,
> might be doable with 3.73 but my jeep had 3.07 with a manual transmission
> when I went to 33's and it was so bad I didn't drive it until I could buy
> the gears.
>

I agree with you, BUT the Rubi comes stock with 4.10 gears anyway, so it may
work out okay. I stick to 4.56s if I was doing it, so the 4.10s won't be too
bad.

 

"Troy" <troy@ .> wrote in message
news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> He is going to have to buy a speedo gear from the dealership, according to
> the ring and pinion gear he already has. I used this link to figure mine
> out: http://www.raingler.com/tech/speedoChart.asp
>

There is no need to buyit from the dealership, any speed shop should carry
them.



> Funny thing is that the parts guy at my dealership said I'd have to
> reflash my computer but I bought the proper speedo gear anyway (he said it
> wouldn't work). It does.
>
> I really think its a bad idea not to change the gears with that size tire,
> might be doable with 3.73 but my jeep had 3.07 with a manual transmission
> when I went to 33's and it was so bad I didn't drive it until I could buy
> the gears.
>

I agree with you, BUT the Rubi comes stock with 4.10 gears anyway, so it may
work out okay. I stick to 4.56s if I was doing it, so the 4.10s won't be too
bad.

 

"Troy" <troy@ .> wrote in message
news:5KednQ688NdWxJLZnZ2dnUVZ_v2dnZ2d@comcast.com. ..
> He is going to have to buy a speedo gear from the dealership, according to
> the ring and pinion gear he already has. I used this link to figure mine
> out: http://www.raingler.com/tech/speedoChart.asp
>

There is no need to buyit from the dealership, any speed shop should carry
them.



> Funny thing is that the parts guy at my dealership said I'd have to
> reflash my computer but I bought the proper speedo gear anyway (he said it
> wouldn't work). It does.
>
> I really think its a bad idea not to change the gears with that size tire,
> might be doable with 3.73 but my jeep had 3.07 with a manual transmission
> when I went to 33's and it was so bad I didn't drive it until I could buy
> the gears.
>

I agree with you, BUT the Rubi comes stock with 4.10 gears anyway, so it may
work out okay. I stick to 4.56s if I was doing it, so the 4.10s won't be too
bad.