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Got a question and what opinions..

89cherokeexj

89cherokeexj

NAXJA Forum User
Location
Victorville
Got my 91 4.0L 4x4, NP231 HP30/D44. Its sitting at about 5" of lift and is currently on 33's. I am wondering which you think is better. Should I get a 4:1 kit for my t-case, or gear the axles?? I definently want some lower gears, even with the 3.73's it just still isnt low enough. I just want your opinions on what you think is better. Time is an issue because the Jeep is my DD, but as long as it stays warm I have a motorcycle to ride. Let me know what you think..
 
redneck23ms said:
i'd gear the axles first. it will help you out on the road as well as on the trail. then you can gear the t-case later if you feel it still isn't low enough
Click to expand...

x2 gears will help out a bunch!
 
Being that it is your daily driver, I suggest the 4:1 kit. I find on mine (33's and 4:56's)that I get alot of driveline vibration at speed (80 MPH). The only thing is that you may start breaking ring and pinion gears or u-joints if you have a heavy gas foot offroad. If you don't need to go 80 MPH then it is a good choice to gear it, I recommend 4:56 or 4:88 for 33's.
 
josh...go 4.88's and 33's plus with a stick it''ll be plenty low for offroading. youll be able to take off in 3rd from a dead stop =D
 
jeeperjohn said:
Being that it is your daily driver, I suggest the 4:1 kit. I find on mine (33's and 4:56's)that I get alot of driveline vibration at speed (80 MPH).
Click to expand...

That driveline vibration is not due to your gearing and tire size.

I will also suggest gearing the axles.
 
4:1 kit won't help you on the road, and that's where you are driving it mostly. I wouldn't hesitate to do gears first. 4.56 or 4.88 will make a huge difference on the road. I have 4.88 and 33's and love it... although 70/75 is about as fast as I drive.
 
If you are experiencing vibrations at that speeds, then your shaft is off balance (could be your front), or your angles are bad.

I have 33's and 4.56, and while I don't normally drive that fast, I have hit that speed without any vibrations. The only problem I experienced at that speed was my Jeep sucks at driving straight.
 
Depending on how hard you wheel, I'd get some 4.56s. If you want 4.88s, I'd say get a full-case locker for the D30 as the stock carrier WILL flex under a hard load because of the two tooth contact point.

I broke a D30 4.88 gearset before blowing a stock shaft (lockrite with full circle clips and 760s).

I have a bunch of friends running 4.56s on stock carriers and lockrites with no issues.
 
Sweet guys, that helped the decision a lot. I do not do serious wheeling, I dont know what you consider serious, but in my opinion I dont ever do any "serious" wheeling. I would like to go 4.88's. I was just curios what you would say about the 4:1 kit and I appreciate everyones comments, keep em comin'
 
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