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Old 05-10-2013, 09:43 AM   #1
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How do I use 2hi, 4hi, 4lo?

Sorry for such a rookie question, but not sure how to use my new toy and don't want to break it , any how I have been driving in 2hi for normal driving, not sure if thats right but it feels right, I have not messed with the 4hi or 4lo yet, don't want to mess it up, any help would be great. 1995 jeep wrangler 2.5, 5 speed.

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Old 05-10-2013, 09:49 AM   #2
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only use your 4hi when in loose mud or gravel never on road. 4lo only when you need extra pulling power and or steep inclines and also in loose dirt or mud. you can pull it back into 4hi by simply pulling back tranfercase lever to 4hi. to go to 4lo you have to be in neutral and pull it into lo range. same to take it out. back up a little after diengaging from 4 wheel drive to take tension off your drive train before you continue on in 2wd. good luck from ky.

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Old 05-10-2013, 09:52 AM   #3
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Thanks for the reply chemicaljeep, so I was right driving in 2hi for normal driving then?
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Old 05-10-2013, 09:59 AM   #4
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check the owners manual, its all in there.

But, heres what I do. It says I can shift on the fly at a few miles per hour but I tend to change in N.

I stop, put it in N, pull the lever straight back into 4H, put it gear and go. For 4L you have to pull the lever to the right, then down. I made a rookie mistake years ago and thought that I had to pull straight back for 4L and couldn't figure out why it would not go into 4L? Then I looked down at the little picture to pull right, then down lol.

4 Low is REALLY low, like driving a tractor. My brakes can hardly hold it back even on idle so make sure you got some room to test it. As in, don't try locking it in while sitting a foot from the garage lol.

Have fun!!! And if it does not want to lock in, drive forward a foot or so and try again...

And a general rule of thumb if it doesn't want to ever come out of gear is that you can shut it off, put in N, put it back in 2wd, Start it up and reverse a few feet then drive forward.

Don't know if my process is the best, but it works, it doesn't grind and it seems to work great.

My general rule is,
2wd for driving most of the time
4hi for snow, ice, sand, really loose gravel and general trail running
4low to pull people out, climb steep hills

And if your ever not really sure its in 4wd, drive in a circle. Your front wheels will be locked and the steering wheel will pull left to right like a tank! No doubt when trying to turn sharp!
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Old 05-10-2013, 10:09 AM   #5
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Awesome info thanks sevenservices, So is it okay to run in 2hi for normal driving?
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Old 05-10-2013, 10:23 AM   #6
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Originally Posted by oxmax360 View Post
Awesome info thanks sevenservices, So is it okay to run in 2hi for normal driving?
Yup. That's meant for normal driving.
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Old 05-10-2013, 10:23 AM   #7
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Yes, the normal people around here never use 4WD for commuting or road driving.

You can shift on the fly from 2WD HI to 4WD HI so long as your speed does not exceed 50mph (not recommended). The front driveshaft is already freespooling at around the same rate as the front axle (and the front axle is turning at the same rate as the rear obviously), so shifting on the fly isn't a problem.

Typically 4WD HI is only used on lower traction surfaces at greater speeds. Sand for one is a great place to use 4WD HI, so is hardpack, ice, snow, mud, so on and so forth.

4WD LO is typically used for steeper inclines that can bog your engine out, and so you can climb an obstacle at a slower and more controlled rate of speed. Keeps the wheels from spinning.

It is not recommended to use 4WD on high traction surfaces, such as tarmac, asphalt, concrete, etc. because the transfercase is a locked differential. It transmits 50% of the power to the front and 50% of the power to the rear. When you turn your vehicle, the front wheels physically travel a further distance, which binds up your entire driveline, so typically you will hear your tires bark and a lot of binding noises coming from beneath.

AWD vehicles don't have this issue because they have a transfercase designed to allow the front end to spin at a greater speed than the rear.
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Old 05-11-2013, 01:14 PM   #8
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Thank you All for the info.. I will mud riding this weekend WOO HOO!!!!!!!

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