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Old 11-28-2013, 12:48 AM   #1
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So how do y'all do "crawl control?"

I have (had anyway) a hand throttle on my TJ for long stretches of water fording, bumpy terrain, what have you. Am I correct in assuming those are no longer possible or desirable for a JK? I never liked mine, I would've rather had a high-idle button. That seems to me a simple thing to implement in a computerized Jeep like the JK, but I'm not a rocket surgeon.

AEV's Procal has a high idle feature, but it apparently only works while the vehicle is standing still. I'd probably be unable to plug it in while driving, and I don't have a winch anyway. Yet. Off Road Engineering's EHT300 requires wire cutting, drilling, and probably warranty burning, and still got negative reviews. Will cruise control work in 4 LO? 4 HI? I recall someone complaining it isn't available when traction control or stability control is disabled. For real? Can it be turned back on?

Finally, I've heard the engine will increase its idle speed automagically to avoid stalling - if you keep your foot off the gas. Is there any truth to that, and is it regardless of the gear (on a manual transmission?) Would that handle pushing through a few feet of water at 5 mph without trouble? There's no obstacle course at any of the Jeep dealerships around here. I also don't know a single person who drives their JK like a proper Jeep, or would let me borrow theirs

So, please, clue me in. Is there a safe, clean, and ideally easy way to implement a high-idle switch or something similar on a JK? Is it even necessary now that Jeeps practically drive themselves? I'm close to buying a fancy new Rubicon, but I just can't seem to figure them all out. My buddy's wife has a Toyota with "Crawl Control," which cuts out after only 12 minutes, but I'm embarrassed to not know the Jeep equivalent!

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Old 11-28-2013, 03:44 AM   #2
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The JK anti-stall feature will work in 4L and 1st gear.

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Old 11-28-2013, 05:22 AM   #3
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Yes the anti stall works well. Even with 35's and reduced crawl ratio. It's hard to stall. I've heard if folks running a cable to their gas pedal to simulate a hand control , and tuners do have a option to increase idle. But this is more for winching.
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Old 11-28-2013, 07:06 AM   #4
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Quote:
Originally Posted by swanson View Post
I have (had anyway) a hand throttle on my TJ for long stretches of water fording, bumpy terrain, what have you. Am I correct in assuming those are no longer possible or desirable for a JK? I never liked mine, I would've rather had a high-idle button. That seems to me a simple thing to implement in a computerized Jeep like the JK, but I'm not a rocket surgeon.

AEV's Procal has a high idle feature, but it apparently only works while the vehicle is standing still. I'd probably be unable to plug it in while driving, and I don't have a winch anyway. Yet. Off Road Engineering's EHT300 requires wire cutting, drilling, and probably warranty burning, and still got negative reviews. Will cruise control work in 4 LO? 4 HI? I recall someone complaining it isn't available when traction control or stability control is disabled. For real? Can it be turned back on?

Finally, I've heard the engine will increase its idle speed automagically to avoid stalling - if you keep your foot off the gas. Is there any truth to that, and is it regardless of the gear (on a manual transmission?) Would that handle pushing through a few feet of water at 5 mph without trouble? There's no obstacle course at any of the Jeep dealerships around here. I also don't know a single person who drives their JK like a proper Jeep, or would let me borrow theirs

So, please, clue me in. Is there a safe, clean, and ideally easy way to implement a high-idle switch or something similar on a JK? Is it even necessary now that Jeeps practically drive themselves? I'm close to buying a fancy new Rubicon, but I just can't seem to figure them all out. My buddy's wife has a Toyota with "Crawl Control," which cuts out after only 12 minutes, but I'm embarrassed to not know the Jeep equivalent!
Just to add a little here. I have a 2010 JK with 4:1 transfer case, 6 speed manual, and 5.38 gears on 37's. When in low range, I can just select the gear I want, let the clutch out, and keep my foot off the throttle and the JEEP will about drive itself. Altho, it will power out in 3rd gear and up if the load gets to be too much. (I Should have just used a lower gear!!)
The JK does have kind of a built in crawl control.
Whenever I shift into low range, if I watch my tach, I see the RPM's increase about 200 RPM and stay there until I shift back to high range.
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Old 11-28-2013, 10:11 AM   #5
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Pictures!

Everybody likes pictures right? Nothing spectacular, but it begs for some kind of 4WD cruise control. Some months I total over 75 miles in these conditions. I like to go 5-10 mph and stay around 1500 rpm.







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Old 11-28-2013, 06:24 PM   #6
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Looks like you have a few good hail dents in your hood.
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Old 11-28-2013, 11:30 PM   #7
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Looks like you have a few good hail dents in your hood.
I bet that hail storm happened just 4 months after I bought the Jeep too. At the time I thought, WOW these TJs sure have some thin sheet metal! The insurance company never did pay to get it fixed. I moved to a different market shortly after, and they wouldn't send me a check because I didn't own the vehicle. I didn't feel like fighting with them because I figured I'd just damage it some other way. Sometimes I wonder what'd happen if I tried to collect on the claim again after 14 years. It's liberating to drive a beat up old Jeep though.

On a side note, the hail damage my TJ sustained would have been only a fraction of the cost to repair had it been designed like the JK. Assuming the JK had unpainted fenders. And a soft top. If I buy a JK, though, I'm getting painted fenders and a hard top. I never learn. :-)
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Old 11-29-2013, 05:24 AM   #8
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I am thinking, from looking at your pictures, that you could just use 4L and about 3 rd gear with a Rubi with 4.10 gears and keep you foot off the gas that it would just roll along at 5-10 mph.

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