Do you HAVE to recal when regearing a 2012
 

For those who have regeared a 2012, did you have to get a tuner? I was told it would go into limp mode if you don't. Really didn't want to have to pay the extra $150 for one, because I think it's pointless with a 6 speed. 60mph is actually 64-65, not that hard :gak:

I didn't buy one for a while with a six speed. On the manual trans it really doesn't matter. It does matter on a auto trans, because the computer shifts it. There is a guy I know that just shifts the auto himself. I finally broke down, and bought the procal. It is nice to have the speedo read the right speed. I real don't know how much it would affect the Nanny Systems on the JK, because mine are turned off 90% of the time except for inspection.

well...
 

One came with my jeep, it's nice to know the speedo is dead on. Actually it's within 2 MPH at 60 vs my iphone GPS app (Dashboard).

I also enabled the DRL with it, so I thought that was cool.

You could always go for a drive and see if limp mode turns on, but I thought that was only for the automatic transmissions?

what gears did you go to? I have a 2012 on 35s (actually 34.5s I think) with an automatic, and it's got plenty of GO for me.

(Rubicon, so it's on 4.11s)

I have the AEV one, ProCal maybe? its got some dip switches and works great.

I have 3.21's and a rubicon transfercase. It's really not that bad on the road and with the transfercase I do just fine in the rocks. I am either going to 4.10 or 4.56.

That's what I thought. Limp mode sounded like a way to sell me something I didn’t need. I could really care less about the speedo.

speedo
 

the problem isn't the speedo. it's the ESP/rollover mitigation software.

if it thinks you are going faster/slower than you really are, it will or will not intervene when it should.

I didn't think I'd like the computer controlling stuff, but I took an exit ramp in the wet too fast, and it settled things down so well, I thought... ya know.. that ain't so bad! I didn't end up off the road or upside down.

Yes, it was 100% my fault for going to quickly on an unfamiliar off ramp. But this JK rides so nice I didn't realize how fast I was going.

While I don't like the nanny state, and always want an OFF switch for these things. I kinda like having it...

I already have 35's on and no problem with ESP or traction control. Would the regear effect speedo moreso than 32's to 35's?
:thinking:

well
 

well, if anything, drive it and see what happens. you can do the math to find the speed, or just download a free app to your iphone or android and see.

i don't see how it would hurt to do the gears, then go for a few test drives.

if you need the procal thing, just get it later.

On automatic i used the AEV Procal...No issues at all...Huge difference with gear swap...

I'm just wondering for those that regeared a 2012 and didn't recal if it will go into limp mode. Never been in limp mode, but it doesn't sound very driveable for a 60 mile commute to and from work :gak: But according to Metaldemon, doesn't sound like he had any issues :thumbsup: