and two: what would cause me to not be able to go past 4h on the 4wheel shifter? i mean maybe im not trying hard enough but it seem like it wont budge.
4L is for crawling speeds. On my new Jeep the manual says to shift from 4H to 4L at a speed under 5 MPH. Other vehicles I've owned, said you had to stop, switch to neutral and then shift into 4L. Check the manual for the specifics of your vehicle.
Basically, it gives you the engine HP and Torque of 3500 rpms that you usually get at say 20 mph, at 7 mph. The reason is pretty obvious. You are gaining a LOT of HP and Torque at slower speeds. This means you can climb up/down/over obstacles with more power, at a slower, more controlled speed.
It also allows for more power, much more quickly. This is more for pickups etc. but you get the idea. Basically you would use it that way, if you need to have a LOT of power very fast, such as when moving a very large heavy trailer around the farm, or yanking out a tree stump etc. if you don't have room to run.
The only "downfall" with 4low, is the opposite of what it is doing. You loose wheel speed. There are certain kinds of mud, along with slippery hill climbs, when wheel speed is much more important than having all your torque quickly. Running your tires at 7mph with full torque will get ya stuck much faster than running your tires at 55mph with full torque when in some suction mud
if you dont have a BL, and no T gase lowring kit, then you must either be doing something wrong or being too "shy", at around 3-4 mph, put it in neutral, then pull the tcase into neutral and continue through neutral to 4lo, it may take a few tries, but with a good hard tug it should go in, dont be worried about hurting the gears or breaking the handle, tug it nice and hard and evenly past neutral and into 4low and it should go, if not, let the clutch in and then try it again b/c the gears may be lining up exactly wrong if you get what i mean
4L is also great when creeping along really narrow winding ATV trails. Sounds like you might just need a linkage adjustment. 5 minute job for someone that knows what they are doing. Mine did the same thing after a rebuild.
Female rolling with the 93 YJ SOA Locked and Hard at Play
I put mine in neutral and then rip the lever, sometimes you have to "rock" it and let it move a little bit, this way like debruins said all the gears have to mesh up right, and sometimes just a little movement causes this to happen. I come to a complete stop b4 doing anything, but I think some ppl. let it keep rolling.
A conlusion is just the place where you got tired of thinking.
how exactly should i go about trying to cahnge it?
meaning like the jeep on, in gear, off and out of gear. that type of thing.
You might want to try this question again, what are you trying to "change"
When going from 4hi through neutral to 4lo you have to move the stick sideways, it's not a strait throw.
I wouldn't recommend trying to shift into 4 lo while moving, I don't know about other YJ's but mine gets all kinda pissed off when I try it while moving.
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782
Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.