Best locker for price?
CF Veteran

Joined: Sep 2009
Posts: 3,612
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From: West Valley
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
My two cents, if I may as I run a Powertrax in the rear (love it by the way).
Throttle is irrelivent, as many have already stated the unit differentiates between the rotation of both sides, if one is greater than the other it unlocks. I have a habit of jumping out in to traffic with a quick punch and turn as A-holes around here will kill you before they'll let you out.
I have no chirp through the turn and as I straighten her out I notice the difference as it locks back up, yeah buddy, thats what traction feels like!
Mind you this is on the street, the locker behaves quite differently in four low and first gear on rock, the low speed, low end torque seems to make it wanna stay locked. My last Moab trip it chirped like it was welded in that situation, on the street or offroad, I love it, and highly recommend it both on and offroad.
Throttle is irrelivent, as many have already stated the unit differentiates between the rotation of both sides, if one is greater than the other it unlocks. I have a habit of jumping out in to traffic with a quick punch and turn as A-holes around here will kill you before they'll let you out.
I have no chirp through the turn and as I straighten her out I notice the difference as it locks back up, yeah buddy, thats what traction feels like!
Mind you this is on the street, the locker behaves quite differently in four low and first gear on rock, the low speed, low end torque seems to make it wanna stay locked. My last Moab trip it chirped like it was welded in that situation, on the street or offroad, I love it, and highly recommend it both on and offroad.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
What fight? No such animal as "the best"......just gotta read up, make a decision and pull the trigger. If I didn't think the P-Trax was a awesome unit for the price, "bang for the buck", the XJ wouldn't be the 4th vehicle I've installed them in. I just like the idea of a simple install, it's fully automatic street or off road.
I'm glad somebody else said "throttle is irrelevant", thanks Desert Rat, hope others gain a better understanding of auto lockers, especially the P-Trax.
I'm glad somebody else said "throttle is irrelevant", thanks Desert Rat, hope others gain a better understanding of auto lockers, especially the P-Trax.
Last edited by djb383; Feb 16, 2012 at 08:36 PM.
Senior Member
Joined: Jan 2011
Posts: 677
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From: Green Bay Wisconsin
Year: 1995
Model: Cherokee
Engine: 4.0L High Output
Ok so whats the advantages of a auto locking compared to a manual locking? I mean seriously. I dont want a whole talk about how 1 brand is better then another. Seriousness is key please.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
With a manual locker, u gotta push a botton, flip a switch, turn it on/off. A manual locker, when engaged, is no differential at all, performs like a spool, miserable on pavement (very strong). When disengaged, it's a plain old open diff (one tire fire). Full ring/pinion set-up required to install a manual locker. Auto locker is automatic, no ring/pinion set up, 2-3 hour install with simple tools.
Senior Member
Joined: Jan 2011
Posts: 677
Likes: 0
From: Green Bay Wisconsin
Year: 1995
Model: Cherokee
Engine: 4.0L High Output
With a manual locker, u gotta push a botton, flip a switch, turn it on/off. A manual locker, when engaged, is no differential at all, performs like a spool, miserable on pavement (very strong). When disengaged, it's a plain old open diff (one tire fire). Full ring/pinion set-up required to install a manual locker. Auto locker is automatic, no ring/pinion set up, 2-3 hour install with simple tools.
Also. what kind of locker would you put in the front then?
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Negative, I never said P-Trax was "the best"......I said there's no such animal as "the best". I like the P-Trax because I'm familiar with it, it's tame for a daily driver, they don't ratchet/click in turns and are easy to install. Others swear by Aussie, Spartan, etc. May not need to lock the front.
Last edited by djb383; Feb 16, 2012 at 09:46 PM.
Former Sponsor
Joined: Feb 2010
Posts: 2,021
Likes: 1
From: Hesperia
Year: 89
Model: Cherokee
Engine: 4.0
iv always ran used detroit lockers i find for cheap. if ur patient you can find one for about $300 and your going to break a lot of things before that locker thinks about giving up 
they arent as bad on the street as a lock right either

they arent as bad on the street as a lock right either
Senior Member
Joined: Jan 2011
Posts: 677
Likes: 0
From: Green Bay Wisconsin
Year: 1995
Model: Cherokee
Engine: 4.0L High Output
Negative, I never said P-Trax was "the best"......I said there's no such animal as "the best". I like the P-Trax because I'm familiar with it, it's tame for a daily driver, they don't ratchet/click in turns and are easy to install. Others swear by Aussie, Spartan, etc. May not need to lock the front.
The ptrax is a lunchbox locker meaning it takes the place of the spider gears in your stock diff. If you have a posi from the factory, you'll have to get and open carrier or a more expensive version of the ptrax that works with the posi carrier (not real sure that's available for all Jeep axles). There are full carrier models such as the detriot locker that are much stronger but expensive and overkill for most Jeep applications. If you get any kind of auto locker in the front, it will make steering a little more difficult in 4 wheel drive but you probably won't notice it in 2 wheel for reasons I've already mention 50 pages ago. If you have a selectable locker in the front, you can turn it off and on depending on if you need it or not. If you opt for a front posi, it will steer easier in all situation but probably won't get you anywhere if a front tire ends up in the air. Auburn makes an electric locker called the ected that is a posi turned off and a spool turned on but it's $$$$$ and you have to have posi additive for it to work properly. The electric lockers are the best hands down but they are expensive. Most people run an auto locker in the rear and a selectable locker in the front
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Former Sponsor
Joined: Feb 2010
Posts: 2,021
Likes: 1
From: Hesperia
Year: 89
Model: Cherokee
Engine: 4.0
if you have sub 35s then buy a lunchbox theyre simple and cheapish.
a few people i know have aussies and they work great. my vote is for aussie if your looking for a lunchbox locker


