New member looking for help. I bought a 2015 JKU lifted with a bad rear end and missing front drive shaft. Jeep had been sitting with no top for a few months at least. I put junkyard rear ended and front drive shaft, same gear ratio from factory so I was told. Jeep goes into limp mode with incorrect gear ratios. I can unplug rear abs sensor and drives perfect without limp mode. Any help is greatly appreciated????
Limp mode issue on 2015 JKU
- Thread starter Kidds Autos
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- jku
Does the rear axle have a locker and your Jeep is a automatic?
This is the problem. Whatever rear end you installed does not match what the ECM originally learned. If you don't have Jscan, you need to hook it up and see what the ECM is set for versus what is installed with respect to the gearing.
You can check to see what gears came in the Jeep from the Factory here.
Build Sheet and Window Sticker Generator
If you want a Build Sheet, add the VIN to: Equipment Listing if you want a Window Sticker, add the VIN to: https://www.chrysler.com/hostd/windowsticker/getWindowStickerPdf.do?vin= (Window sticker seems to be working again on 2013+ models)
wranglerjkforum.net
Sent the Jeep to the dealership to get it reflashed, they said everything matched and they THINK it’s in the transmission! But if that’s the case why does it shift perfect with the abs sensor unplugged
I don’t think this works anymore, at least it doesn’t on my 2014. I tried mobile and desktop. And yes I followed the instructions in the thread.
I sent it to Jeep dealer to get the gears and all checked and or get it flashed. They said they THINK it’s in the transmission after keeping it for two day.
