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Old October 27th, 2011, 12:13 AM   #1
jake149
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Default help with some questions

im going to be putting myself together a jeep and have some questions that i always thought about.

first, whats the difference between a full spool,semi spool,limited slip,full floatimg,etc. pros and cons of each.im looking for either dana 44's or 60's.

what is passenger side drop? or driver side drop?

what is the king pin dana 60?

im leaning towards getting a wrangler, yj or tj. but im worried that they may be to light? am i completley wrong? i owned a lifted xj and it could go through anything i wanted.

what kind of gas mileage can ii expect out of a stock wranger 6cyl. and can 35's be handled with on a 4cyl motor with PROPER gearing or should i just stick with the bulletproof 6.?

the main difference between the tj and yj is the full leafs around or the springs. do the leafs have ground clearance problems.

whats the point of spring under the axles? benefits?


yea lots of questions that could probably be answered by typing them in on google, but they dont give me opinons and im looking for those too.

any help would be appreciated, you dont have to answer every question, im sure someone else wiill chime in. thanks everyone

im trying to finally build "my" rig thatll ill keep, so i want it done good and the first time haha.

Last edited by jake149; October 27th, 2011 at 01:06 AM.
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Old October 27th, 2011, 12:01 PM   #2
Ironman Offroad
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1) Full spool locks both axle shafts together mechanically for improved traction. Not good for the street.
2) Never heard of a "semi-spool".
3) Limited slip creates friction to help power both axle shafts in low traction situations.
4) A full floating axle carries no weight from the vehicle, only powers the wheels where as a semi floating axle carries the weight and powers the wheels.
5) Drop side is determimed by what side of the vehicle the front differential housing is positioned on the front axle asm..
6) No such thing as too light. Like there is no such thing as too much money, beer, vacation time ect.
Next person can carry on from here.
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Old October 27th, 2011, 12:27 PM   #3
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Quote:
Originally Posted by Ironman Offroad View Post
1) Full spool locks both axle shafts together mechanically for improved traction. Not good for the street.
2) Never heard of a "semi-spool". im guessing mini spool is what he is talking about which just replaces the spider and side gears in an open carrier, same characteristics as a full spool, just not as strong. you dont have to re set up your gears though. i would weld the spiders before i put a mini spool in
3) Limited slip creates friction to help power both axle shafts in low traction situations.
4) A full floating axle carries no weight from the vehicle, only powers the wheels where as a semi floating axle carries the weight and powers the wheels.
5) Drop side is determimed by what side of the vehicle the front differential housing is positioned on the front axle asm..
6) No such thing as too light. Like there is no such thing as too much money, beer, vacation time ect.
Next person can carry on from here.
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Old October 27th, 2011, 12:30 PM   #4
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you should spend a little bit of time looking through the rigs and builds section and the tech sections. most of these questions would be answered for you there.
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Old November 9th, 2011, 08:37 PM   #5
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If you know how to drive a stick get a stick. The automatics (999) are a joke which is why people swap the aw-4 speed into tj's. The gearing is good, the motor life, and gas mileage is a lot better then with a manual.

Passenger side drop means that the differential is on the passenger side. If you have a transfer case with a passenger side output you need a differential with a passenger side input. Having a transfer case with a passenger side output and a axle with a drivers side drop would have the drive shaft crossing under the transfer case and oil pan and would not work.

You can make a 4 cylinder work off road by using a manual and good gearing. Just don't expect to pass anyone going up hill on the highway.

The 4 cylinder is really stout, easy to work on, and cheaper to run.

For the most part 33" tires are about the safe limit for the stock axles capability. Anything over 31" tires and you should start looking at a lift of some sort(or a hack saw).

On a YJ, going spring over (SOA) is basically putting the spring on top of the axle (over) instead of under the axle. It is a cheap way to gain 3+ inches of lift and works great for a trail only rig. The general rule is that if you plan on going on the highway with it a spring over is not a good idea. Having the spring under (SUA) gives you better control overall.

The tj's have a 4 link coil sprung suspension. It gives better control and a bit more ground clearance then the yj's leafs but the lifts cost a lot more. Although using a linked suspension you can extend the axle out to the end of the frame. If you have leafs you can only move the axle back to the center of the spring.

By "semi spool" I think you mean automatic or selectable locker.

A automatic locker is one that disengages automatically giving you a open rear end in a turn.
A selectable locker is controlled by a switch of some type and can be left on or off at all times so you can have a open or locked rear when you choose.

A selectable locker requires some type of wire or hose going to the axle where as a automatic does not.
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