6th Gear...... why do we have it? - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 97 Old 11-03-2011, 09:59 AM Thread Starter
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6th Gear...... why do we have it?

I am a first time Jeep Owner this week. I have yet to use 6th gear. Well i tried at 70 mph but it just fell on its face. Whats the need of gear 6?
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post #2 of 97 Old 11-03-2011, 10:08 AM
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Originally Posted by Living_Legend View Post
I am a first time Jeep Owner this week. I have yet to use 6th gear. Well i tried at 70 mph but it just fell on its face. Whats the need of gear 6?
congrats on the new jeep! i have an auto so i couldnt tell you but i hope you enjoy the other 5 gears nonetheless!

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post #3 of 97 Old 11-03-2011, 10:10 AM
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What size tires/gears are you running? I've got a set of heavy Toyo 33.5's and run 75-80 mph on the highway daily.
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post #4 of 97 Old 11-03-2011, 10:10 AM
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I am a first time Jeep Owner this week. I have yet to use 6th gear. Well i tried at 70 mph but it just fell on its face. Whats the need of gear 6?
Tire size? Axle ratio?

2009 X 2-door 6-speed
budget boost, bilsteins, discos, 35's, 4.88's, and more issues than TV Guide
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post #5 of 97 Old 11-03-2011, 10:13 AM
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Originally Posted by Living_Legend View Post
I am a first time Jeep Owner this week. I have yet to use 6th gear. Well i tried at 70 mph but it just fell on its face. Whats the need of gear 6?
Sixth gear is nice if you have the power/gearing to use it. Otherwise, yeah useless.

Do you know what gearing you have? What size tires are you running?

In my case, from factory I had 4.10 gears and 32" tires and 6th was very usable. I now have 5.13 gears and 37" tires and still use 6th effectively. I think the 6 speed is awesome.

And not to mention when in 4-low, I find myself using 6th on occasion as well.


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post #6 of 97 Old 11-03-2011, 10:14 AM
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We have a sixth gear so it can be readily confused with reverse while traveling at highway speeds.

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post #7 of 97 Old 11-03-2011, 10:15 AM Thread Starter
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i bought my jeep Monday. It has a 4 inch lift and 37inch tires. I have no idea what the gear ratio is......
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post #8 of 97 Old 11-03-2011, 10:17 AM
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I use mine every day, and I don't really shift out of it unless I have to slow substantially. 35s w/4.10s. It'll hold between 65-75 isn't quite in it's wheelhouse, 80+ and it'll hold it though the passes between Nevada and Texas without downshifting.

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Originally Posted by Living_Legend View Post
i bought my jeep Monday. It has a 4 inch lift and 37inch tires. I have no idea what the gear ratio is......
Mkay... Rubicon, Sahara, X?

2009 X 2-door 6-speed
budget boost, bilsteins, discos, 35's, 4.88's, and more issues than TV Guide
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post #10 of 97 Old 11-03-2011, 10:19 AM
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We have a sixth gear so it can be readily confused with reverse while traveling at highway speeds.
Scared the ever loving shit out of myself the first time I did it... BXZZZZZZZTT~!!~! WTF was that???



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post #11 of 97 Old 11-03-2011, 10:19 AM Thread Starter
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Mkay... Rubicon, Sahara, X?
2008 Sahara
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post #12 of 97 Old 11-03-2011, 10:20 AM
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i bought my jeep Monday. It has a 4 inch lift and 37inch tires. I have no idea what the gear ratio is......
Toss some 5.13s in there and you'll get it back.

31 jeeps in... still have issues
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post #13 of 97 Old 11-03-2011, 10:21 AM Thread Starter
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post #14 of 97 Old 11-03-2011, 10:22 AM Thread Starter
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Toss some 5.13s in there and you'll get it back.
i am used to changing gears out when i owned american muscle cars for racing but what is the point for a Jeep? i dont plan on racing the Jeep around town, what are the reasons people change gears out in a jeep?
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post #15 of 97 Old 11-03-2011, 10:23 AM
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i am used to changing gears out when i owned american muscle cars for racing but what is the point for a Jeep? i dont plan on racing the Jeep around town, what are the reasons people change gears out in a jeep?
To regain drivability when installing larger tires, to fix what you are complaining about... Larger tires affects your overall gear ratio, dropping axle ratio tires improves torque multiplication and it'll drive better. Let alone you get better crawl ratios off road for the non-mall crawlers.

Far from anything about racing..

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post #16 of 97 Old 11-03-2011, 10:25 AM
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Prolly still has stock gears in it, in which case you can determine what it has through diff-markings, getting the VIN decoded by dealer, or jack up a back wheel and count wheel and driveshaft rotations... most people seem too lazy for that last one. Either way, to make 6th useful you'll need to regear.

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post #17 of 97 Old 11-03-2011, 10:25 AM Thread Starter
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To regain drivability when installing larger tires, to fix what you are complaining about... Larger tires affects your overall gear ratio, dropping axle ratio tires improves torque multiplication and it'll drive better. Let alone you get better crawl ratios off road for the non-mall crawlers.

Far from anything about racing..
word, i guess they havent been changed aready, not sure how to check.

so is my mileage counter off also?
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post #18 of 97 Old 11-03-2011, 10:29 AM
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word, i guess they havent been changed aready, not sure how to check.

so is my mileage counter off also?
Yes, odometer is more than likely off as well. But that would need to be corrected with a speedo calibrator as opposed to just gears.


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post #19 of 97 Old 11-03-2011, 10:30 AM
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Originally Posted by Living_Legend View Post
i am used to changing gears out when i owned american muscle cars for racing but what is the point for a Jeep? i dont plan on racing the Jeep around town, what are the reasons people change gears out in a jeep?
I'd guess you have 3.73's with your Sahara. I can see why it's a dog on the highway with those 37's. Like Goody said, swapping out gears for a set of 4.88's or 5.13's would help get it back to a more driveable setup, even if you aren't driving it like you stole it. (And, if you plan on off-roading much, swapping the gears out could also serve as an opportunity to throw a set of lockers in there as well!)

Here's a chart for the best gear ratio to tire sizes:
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post #20 of 97 Old 11-03-2011, 10:31 AM Thread Starter
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Yes, odometer is more than likely off as well. But that would need to be corrected with a speedo calibrator as opposed to just gears.
so am i putting on more or less miles on my Jeep with out the speedo calibrator?
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post #21 of 97 Old 11-03-2011, 10:31 AM
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Originally Posted by Living_Legend View Post
word, i guess they havent been changed aready, not sure how to check.

so is my mileage counter off also?
Speedo may have been calibrated, playing with an rpm calculator and comparing to your results should be fairly accurate. However if they were changed, you probably wouldn't have the issue you have now either..

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post #22 of 97 Old 11-03-2011, 10:32 AM Thread Starter
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Originally Posted by merlin4979 View Post
I'd guess you have 3.73's with your Sahara. I can see why it's a dog on the highway with those 37's. Like Goody said, swapping out gears for a set of 4.88's or 5.13's would help get it back to a more driveable setup, even if you aren't driving it like you stole it. (And, if you plan on off-roading much, swapping the gears out could also serve as an opportunity to throw a set of lockers in there as well!)

Here's a chart for the best gear ratio to tire sizes:
excuse my ignorance... i am learning... lockers?
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post #23 of 97 Old 11-03-2011, 10:43 AM
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Originally Posted by scrogg View Post
Sixth gear is nice if you have the power/gearing to use it. Otherwise, yeah useless.

Do you know what gearing you have? What size tires are you running?

In my case, from factory I had 4.10 gears and 32" tires and 6th was very usable. I now have 5.13 gears and 37" tires and still use 6th effectively. I think the 6 speed is awesome.

And not to mention when in 4-low, I find myself using 6th on occasion as well.
Are you serious? When do you use 6th gear in 4lo?

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post #24 of 97 Old 11-03-2011, 10:43 AM
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Originally Posted by Living_Legend View Post
excuse my ignorance... i am learning... lockers?
Lockers are what keep both of your tires moving when on the trail (or in snow, mud, etc.) The Sport, X, and Sahara models come with "open" or limited-slip differentials, which means that power is only going to 1 side. Rubicons come with electronic lockers in the axles. Lockers, well..."lock" the two halves of the axles together to get power to both sides.
Like I mentioned, not "necessary" but if you plan on offroading a lot, then they're well worth it, and swapping out gears is a great time to do both.
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post #25 of 97 Old 11-03-2011, 10:47 AM
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Ditto on regear. My JK is doing fine with 5.13 gears and 37's. Took a camping trip with the wife, kids and a couple hundred pounds of stuff.
I only had to go back to 5th on the longer steep hills in PA.
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