24 4xe Tazer vs Jscan

[8MYCA5H]

Have a 24 4xe Rubi and just went to 37s. Want to change tire size but also be able to read and clear codes. Not trying to spend a lot but if ones a lot better than the other I’d get it. Help me decide

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[nositting]

either will do the job, as i understand it. you’ll need a few things and everyone will recommend the security bypass extension with whichever route you go. it sounds like you might be a little familiar with the products already. jscan with the 12+8 pin connector will be cheaper than the tazer however some very knowledgeable experts, like rhinebeck01, will tell you that the 12+8 connector is “clunky” (i disagree, it’s fine) and that you can recoup a good chunk of the tazer cost upon selling it (i agree). both should work well for you. lots of threads on these.

 

[Rhinebeck01]

Have a 24 4xe Rubi and just went to 37s. Want to change tire size but also be able to read and clear codes. Not trying to spend a lot but if ones a lot better than the other I’d get it. Help me decide

@8MYCA5H

My feeling is ..... that a guy / gal, that puts "37's" on their new JL, will during ownership of that JL ... want to do more / need to more, then just tire size calibration and clearing of codes.

With the knowledge I have in regard to programmers / programming of the JL/JT and knowing that you installed 37's, I can tell you that you would be best to definitely, start off with JSCAN and that you will always, during the ownership of your JL, find yourself using/keeping JSCAN.

YES, I do think that a guy that installed 37's will probably want a Tazer JL Mini, eventually... and you will go with a Tazer JL Mini.

... BUT, I do know you will always want/need JSCAN in the mix with the Tazer JL Mini.

Do forum research in regard to what I coined the hybrid approach in regard to using both JSCAN and a Tazer JL concurrently..

Do tire calibration, asap.

JSCAN is easy to use and unlike with the Tazer JL Mini, with JSCAN... there is no very sizeable learning curve in regard to proper use.

By the way.... You can buy a JSCAN license and an inexpensive, "Recommended by JSCAN" scan tool and the needed other hardware for a total $ outlay of as little as $65.

.

 

[8MYCA5H]

@8MYCA5H

My feeling is ..... that a guy / gal, that puts "37's" on their new JL, will during ownership of that JL ... want to do more / need to more, then just tire size calibration and clearing of codes.

With the knowledge I have in regard to programmers / programming of the JL/JT and knowing that you installed 37's, I can tell you that you would be best to definitely, start off with JSCAN and that you will always, during the ownership of your JL, find yourself using/keeping JSCAN.

YES, I do think that a guy that installed 37's will probably want a Tazer JL Mini, eventually... and you will go with a Tazer JL Mini.

... BUT, I do know you will always want/need JSCAN in the mix with the Tazer JL Mini.

Do forum research in regard to what I coined the hybrid approach in regard to using both JSCAN and a Tazer JL concurrently..

Do tire calibration, asap.

JSCAN is easy to use and unlike with the Tazer JL Mini, with JSCAN... there is no very sizeable learning curve in regard to proper use.

By the way.... You can buy a JSCAN license and an inexpensive, "Recommended by JSCAN" scan tool and the needed other hardware for a total $ outlay of as little as $65.

.

Thank you for the info. I also have a jku with 37s but for that one I only used the Superchips flashcal. Since you seem to be really knowledgeable I’ll ask you this instead of starting a new thread. It’s probably a dumb question but these new wheels and tires came off a 21 jlu and already had TPMs sensors in them. When I installed them yesterday and drove it for about 30 minutes it was showing tire pressure. When the wife drove it this morning it’s now showing red X on the screen. Do the tpms sensors need to be married to the jeep somehow?

 

[Rhinebeck01]

Thank you for the info. I also have a jku with 37s but for that one I only used the Superchips flashcal. Since you seem to be really knowledgeable I’ll ask you this instead of starting a new thread. It’s probably a dumb question but these new wheels and tires came off a 21 jlu and already had TPMs sensors in them. When I installed them yesterday and drove it for about 30 minutes it was showing tire pressure. When the wife drove it this morning it’s now showing red X on the screen. Do the tpms sensors need to be married to the jeep somehow?

It depends on when the 2021 JL was manufactured.

IF the 2021 JL, left the factory after mid June 2021, the TPMS's from that 2021 vehicle will not work on a 2021 that left factory after mid June 2021 or on any newer JL vehicles 2022-2024.

IF a JL has the correct TPMS's , they just will sync right up to the JL, with no programming / no "marrying" necessary.

 

[dlong1119]

There was a TPMS change mid-year for the '21 model so if you have the earlier sensors then they won't work and you were initially just seeing the last value that your Jeep had stored, but once it went to update it couldn't.

 

[RCJL18]

@8MYCA5H

My feeling is ..... that a guy / gal, that puts "37's" on their new JL, will during ownership of that JL ... want to do more / need to more, then just tire size calibration and clearing of codes.

With the knowledge I have in regard to programmers / programming of the JL/JT and knowing that you installed 37's, I can tell you that you would be best to definitely, start off with JSCAN and that you will always, during the ownership of your JL, find yourself using/keeping JSCAN.

YES, I do think that a guy that installed 37's will probably want a Tazer JL Mini, eventually... and you will go with a Tazer JL Mini.

... BUT, I do know you will always want/need JSCAN in the mix with the Tazer JL Mini.

Do forum research in regard to what I coined the hybrid approach in regard to using both JSCAN and a Tazer JL concurrently..

Do tire calibration, asap.

JSCAN is easy to use and unlike with the Tazer JL Mini, with JSCAN... there is no very sizeable learning curve in regard to proper use.

By the way.... You can buy a JSCAN license and an inexpensive, "Recommended by JSCAN" scan tool and the needed other hardware for a total $ outlay of as little as $65.

.

I am new here and not sure If I should reply to an older post or start new, it is based on this post and question. I currently have 2018 Jeep JL 3.5 lift and I have purchased and Jscan and using the Vgate Icar Pro that was on the approved list.

My issue is with my NEW 37x13.50x18 and after having used the Jscan to update the Tire size and I am not shifting right on the highway at all, it does shift out into 7th and sometimes even 8th going downhill but most of the time for even a slight incline of a hill it will push all the way down to 4th and 5th shifting back and forth over and over again while using cruise control or even without.

I call a local 4x4 dealership and they said I needed to get a Tazer to set the tire sizes and they didn't know anything about Jscan so they could only recommend Tazer min or lite even for the Tire size setting. Please help I dont want to do any damage with the way things are currently.

 

[dlong1119]

If your speedo is reading correct now then your issue is most likely gearing. Jscan is perfectly fine for setting tire size and actually better than a Tazer for that and a number of other changes because they're permanently set and not related to the Tazer being married to the Jeep.

 

[Rhinebeck01]

I am new here and not sure If I should reply to an older post or start new, it is based on this post and question. I currently have 2018 Jeep JL 3.5 lift and I have purchased and Jscan and using the Vgate Icar Pro that was on the approved list.

My issue is with my NEW 37x13.50x18 and after having used the Jscan to update the Tire size and I am not shifting right on the highway at all, it does shift out into 7th and sometimes even 8th going downhill but most of the time for even a slight incline of a hill it will push all the way down to 4th and 5th shifting back and forth over and over again while using cruise control or even without.

I call a local 4x4 dealership and they said I needed to get a Tazer to set the tire sizes and they didn't know anything about Jscan so they could only recommend Tazer min or lite even for the Tire size setting. Please help I dont want to do any damage with the way things are currently.

Well, whether you do tire size programming with a Tazer JL or JSCAN , there is no difference.

Just get the tire size itself, programmed properly .... and verify with GPS that your speedo is aok at varying speeds after programming.

After you do the tire size programming the JL's computer will adjust shift points... but with 37's (especially without gearing) you will not have the same same experience lets call it, as when you run with stock tire size. You may rarely see 8th gear for example and ...

.

 

[RCJL18]

If your speedo is reading correct now then your issue is most likely gearing. Jscan is perfectly fine for setting tire size and actually better than a Tazer for that and a number of other changes because they're permanently set and not related to the Tazer being married to the Jeep.

Thank you for the reply.

The dealership owner said he has the same JL I do and also has 37's on his JL with zero issues like mine and said the stock JL should have no issue with 37's.

 

[RCJL18]

Well, whether you do tire size programming with a Tazer JL or JSCAN , there is no difference.

After you do the tire size programming the JL's computer will adjust shift points... but with 37's you will not have the same same as when you run with stock tire size. You may rarely see 8th and ...

.

I am fine not seeing 8th but 4th and 5th over and over again back and forth on an hour drive is im sure super bad for the Jeep.

 

[dlong1119]

Thank you for the reply.

The dealership owner said he has the same JL I do and also has 37's on his JL with zero issues like mine and said the stock JL should have no issue with 37's.

But what gears are you running and is he regeared? I'm going to guess 3.45s. Is he running the same? For 37s you'll want at minimum 4.10s to keep some semblance of decent highway performance.

 

[RCJL18]

But what gears are you running and is he regeared? I'm going to guess 3.45s. Is he running the same? For 37s you'll want at minimum 4.10s to keep some semblance of decent highway performance.

I believe mine are 3.45s and he said he has stock as well so I would say 3.45s but I can call again to confirm.

 

[dlong1119]

Yeah, 3.45s are probably tolerable around town as the 8 speed transmission can make up for some of the loss but there's just no way highway driving is ideal with that combo and you're going to be downshifting constantly as you've been seeing. I wouldn't put much stock in that guy's opinions or expertise if he's saying you're fine with that combo. He's also defaulting to "get a Tazer", when that is not the best way to change a lot of the Jeep settings.

I'm running 3.73's with my 35's and even with the added power of the 4xe I'm getting ready to swap in 4.56's as I see more downshifting than I'd prefer on the highway. If I knew I was staying with 35's then I'd probably just move to 4.10's but I'm planning for 37's when these are ready to be replaced.

 

[RCJL18]

I believe mine are 3.45s and he said he has stock as well so I would say 3.45s but I can call again to confirm.

Yeah, 3.45s are probably tolerable around town as the 8 speed transmission can make up for some of the loss but there's just no way highway driving is ideal with that combo and you're going to be downshifting constantly as you've been seeing. I wouldn't put much stock in that guy's opinions or expertise if he's saying you're fine with that combo. He's also defaulting to "get a Tazer", when that is not the best way to change a lot of the Jeep settings.

I'm running 3.73's with my 35's and even with the added power of the 4xe I'm getting ready to swap in 4.56's as I see more downshifting than I'd prefer on the highway. If I knew I was staying with 35's then I'd probably just move to 4.10's but I'm planning for 37's when these are ready to be replaced.

So you think 4.56 for my setup is the best way to go then? I wanted to also add that when I was watching the how to video on the Jscan for tire change setting, it was saying to measure the actual tire size, I do think the first time I set the tire size I had it not dead on and the second time I made it what seem to be closer and this did make an improvement. I am wondering if I can play with that tire size a little more and make a positive change, or will it just always end with needing 4.56 gears?

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