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Old 05-17-2015, 07:24 AM
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odd smell in JK

I purchased a 15 Willys and had it off road(rutted dirt road) for the first time a couple of days ago. I have less than 500 miles on it. I started to go up a hill and decided I had better put in 4wd hi (it was at night on a tight trail and I didn't want to back down). I put it in 4wd and tried to go and it stalled...I tried again and stalled ---it was like it had NO power. I tried to give it more gas and had a burning smell...so was it the clutch? Why do these things have no power starting on a hill in 4wd? Is it the HSA? Put in low range?

Yes I do know how to drive a manual...I have a cj5 with a stick shift currently...I have it off road all the time and NEVER experienced anything like what I did with the JK...Any thoughts????

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Old 05-17-2015, 08:42 AM   #2
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Probably burning clutch smell. I wouldn't worry to much about it. In hindsight you should have restarted it, backed down the hill. Put it in 4hi and then attempted the hill again. The transfer case doesn't put you in 4hi immediatly even though you can shift into 4h stopped it takes a little motion to actually engage. So you had that going against you.

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Old 05-17-2015, 08:50 AM   #3
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Slow is fast, try 4 LO next time. If you want to rule out the Hill Assist; let off the brake pedal for two sec. and the Jeep will start to roll backwards slightly letting you know it is disengaged. Start off in second gear and see how it reacts to the terrain.
Some things are hard to imagine on the internet. We can't tell the incline, how loose the road is or such factors as this.
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Old 05-17-2015, 10:18 AM   #4
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The odor was most likely the clutch, which that can happen. I agree with putting it in 4L. I don't think HSA was involved.
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Old 05-17-2015, 08:59 PM
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Thank you for the information. The JK is a much different animal from the CJ...I'm not used to all the newness. As a follow up question...how bad can you hurt a JK clutch it only happened that one time and it seems to shift okay now?
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Old 05-17-2015, 10:12 PM   #6
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if you are offroad and have no intentions of going over 20mph, put it in 4L. That is exactly the reason why you have a transfer case with a low range. When you use 4L, your engine, transmission, and clutch become 2.73x more effective and your engine is seeing RPM's that give you much more power.

your clutch is probably fine. If thats all it took to kill a clutch, "16 year old me learning to drive" would have needed a new clutch.
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Old 05-18-2015, 07:35 AM   #7
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Turn off HSA and your traction control when on the trail....Id leave the HSA off all of the time.
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Old 05-18-2015, 08:08 AM   #8
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4L gives you more torque for climbing. Climbing hills in 4H is like going up a hill on the highway in overdrive.
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Old 05-18-2015, 06:34 PM
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Thanks again for the information...it seems fine. I'll try 4 hi/lo next time before I think I need it. Much different than the CJ...
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Old 05-18-2015, 06:34 PM
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Don't get me wrong love both of them just different.

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