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Pros and Cons of different differentials?
Posted 25 February 2005 - 01:19 PM
For example, I saw posts saying you should not run 4WD on surfaces with less than 10% slippage, that welded diffs have problems turning, etc. It would be really helpful to have a comparison of what is gained and lost with each version to help decide what to do.
Thanks for your help and advice!
Posted 25 February 2005 - 02:04 PM
I assume you mean rear differential.
Open/AWD (rear diffs in AWD are mostly open)
PRO: Stock set up, plentiful supply
CON: limited off-road abilities
Applications: Stock set up, trail-mild off-roading
Pro: Better off-road traction
Con Hard to find, May have wrong gear ratio
Applications: auto/rally cross, mild-hard off-roading
Pro: BEST off-road traction
Con: Requires removal of axles for street use, breaks parts due to added stress
Application: Hard Core off-roading,
Posted 25 February 2005 - 02:12 PM
Four Wheel Drive (4WD or 4x4) does not have a center differential. The transfercase locks power split 50/50 front/rear differentials. This is why you shouldnt run it on dry pavement. You can bind up the drive train and wear out parts quickly.
Posted 25 February 2005 - 04:03 PM
Posted 25 February 2005 - 04:28 PM
Thanks for info. So it would appear that if I don't want to mess with disconnecting axles, the best would be an LSD for on and offroad use?
Posted 25 February 2005 - 05:53 PM
The problem as S'Ko mentioned is it will be geared at a 3.7 so you will probably need to change out the internal gears to a 3.9.
I'm not real convinced an LSD is going to be noticable off-road. It will probably help a bit but I'm not sure it's worth the effort. I believe it's best application is on snowy pavement. If you put a wheel in the air your still going to spin it and not spin the one on the ground. It's not a locker and not positraction.
A welded diff will get you where you want to go but you still have the axle removal issue for pavement. It should take 5 - 10 minutes to pop the diff off and pull an axle off it.
Posted 25 February 2005 - 11:17 PM
Posted 25 February 2005 - 11:38 PM
I probably won't modify my differential at all since I live 800 miles from the nearest hill that would require 4WD (north Texas is flaaaat). But snow conditions are a concern (2 weeks or so out of the year...). Tomorrow I am going to look at a differential to see if it is LSD, so I wanted to know whether it might be worth getting. Thanks again for the helpful info.
If you are only worrying about snowy conditions for 2 weeks out of the year, I would say, "don't mess with any differential mods!" It's really not worth your time or money. Just drive sensibly in the snowy stuff. I cant imagine that you get a mass amount of snow in Texas or enough to worry about YOUR subaru having traction problems in it.
Posted 26 February 2005 - 04:09 PM
i have an LSD and i like it in the snow and off road. particularly helpful when pulling someone else out of the snow/mud and your rear wants to break loose. i have started slipping in deep snow while pulling someone else and feel the LSD temporarily lock up and regain solid traction.
$225 gets you a 3.7 lsd if you PM or email me.
Posted 26 February 2005 - 05:08 PM
If it is an LSD, and the price is reasonable, there are plenty of us on the board looking for one. (Can you say resale?)
...Tomorrow I am going to look at a differential to see if it is LSD, so I wanted to know whether it might be worth getting...
Just a thought.
Posted 26 February 2005 - 07:07 PM
You can pick up a LSD at the local junk yard. But they are hard to come by. If you find one GRAB IT.
Posted 28 February 2005 - 10:59 AM
there are also aftermarket lockers. phantom grips and detroit lockers for instance. these would be ideal in theory, though i don't know their reliability.
Phantom Grip is an LSD
Detroit does not make a locker for our diffs.
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