2021 4xe, lift, 37's, gears, flash

JR HANK

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All the goodies, 2.5" lift (matched EPIC to the "T"), 37's, bumpers, winch, dealer flash then to the gears..... Z automotive said it worked, so she went in for 4.56's, then two days of trying to flash went south back and forth texting, doesn't work on the latest model. Z is working on cracking the code, so a waiting game at this point, possibly two weeks. Keep in mind the recient 4xe's are different than the earlier, different parts, various changes and suspect the ECM as well, been almost 2 weeks.

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hoag4147

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So are saying current tazer software doesn’t work on the latest 4XEs?

Oh and forgot to say. Great looking ride there. It looks great at that height and 37s :like:
 
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JR HANK

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So are saying current tazer software doesn’t work on the latest 4XEs?

Oh and forgot to say. Great looking ride there. It looks great at that height and 37s :like:
Not for gears currently
 
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JR HANK

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Not for gears currently
Let me just add before being asked, little to no effect on daily battery usage to and from work and around town.
 

GATORB8

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Looks great!

That’s the Rugged Ridge HD right? Did you do the matching rear?
 

Gazelle

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Sorry to hear you're having trouble to reflash for the gearing. Can you simply ask the dealership to reflash that setting for you?

I am also running the 37" KO2's with the 1" Mopar lift on my 4xe Rubicon. I really don't see much need to regear with my light weight tires & wheels (87.4Lbs tire+wheel).

Also, did you change driveshaft like in the Epic video?
 

GATORB8

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Sorry to hear you're having trouble to reflash for the gearing. Can you simply ask the dealership to reflash that setting for you?

I am also running the 37" KO2's with the 1" Mopar lift on my 4xe Rubicon. I really don't see much need to regear with my light weight tires & wheels (87.4Lbs tire+wheel).

Also, did you change driveshaft like in the Epic video?
Or what about just adjusting the tire size input to account for the gear change for now?
 
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JR HANK

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Dealers wont touch any flashes now days other than tire size changes
 

4xe Rubicon

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Could I see a shot of your Uconnect screen showing the front camera. I'd like to see how much the bar blocks the view. Great build btw. Keep us updated on the Tazer issue.
 

MeanTT

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@JR HANK
Could I see a shot of your Uconnect screen showing the front camera. I'd like to see how much the bar blocks the view. Great build btw. Keep us updated on the Tazer issue.
im in the same boat. I have 37s and 5.13 gears. The reflash does not work for gears. No regen anymore. The speedometer is way off, and every conceivable dash light is on. The Tazer worked fine for just tire sizes.

I was told that the software won’t support anything larger that 4.50 gears which means any replacement gears won’t work. If you try to mess with it on a combination of hearing at 4.49 and smaller tires it throws the ECU into limp mode and you have dangerously little power. You can’t drive over 30 or 35.

I wish I had know the software didn’t work long time ago. I don’t know how the instructions on the TAZER speak to hear changes when they know that gear changes aren’t supported.

#frustrated. But the customer support at Zautomirve has been spectacular.

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89138

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Has there been any resolution to the gear and tire size issues related to the tazer/4xe. Contemplating changing gearing now.
 
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