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LSD vs Locker...?

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Old 04-03-2008, 01:39 PM   #1
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LSD vs Locker...?

Whats the difference, the pros and cons of both. For the most part does a does a limited slip diff do the same stuff a locker does?

Examples please!

Sorry if this thread has been done allready.
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Old 04-03-2008, 02:07 PM   #2
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check the 2nd gen section....a few topics of the sort still running up there
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Old 04-03-2008, 04:22 PM   #3
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Try searching this forum or using Google. You'll find all sorts of information about them both.

In a nutshell....
LSD is a Limited Slip Differential that comes in the TRD Sport models and some non-TRD models. It offers traction to both wheels when both wheels are spinning at the same rate. It engages / disengages on its own. The driver doesn't have to do anything.

TRD Locker can only be engaged in 4lo and the driver must engage it. It's often called an e-locker and can only be found in the TRD Offroad models. This is a fulltime locker that engages both wheels via gearing and does not come disengaged unless you (the driver) disengages it. Both wheels are locked together regardless of the terrain or wheel speed. One wheel can be off the ground and the other wheel will still have 'drive'.

Because the LSD is always in use and doesn't require any input from the driver, it's the only factory optioned traction device that's designed for street usage (on pavement).

The e-locker can only be engaged in 4WD - so you can't use it on pavement (never use 4WD on pavement).

If you're going offroad, the e-locker is the best choice to have.
If you're looking for traction device for daily driving on the street and some traction for minor offroading - the LSD is the best choice.
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Old 04-03-2008, 04:26 PM   #4
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Quote:
Originally Posted by Janster View Post
Try searching this forum or using Google. You'll find all sorts of information about them both.

In a nutshell....
LSD is a Limited Slip Differential that comes in the TRD Sport models and some non-TRD models. It offers traction to both wheels when both wheels are spinning at the same rate. It engages / disengages on its own. The driver doesn't have to do anything.

TRD Locker can only be engaged in 4lo and the driver must engage it. It's often called an e-locker and can only be found in the TRD Offroad models. This is a fulltime locker that engages both wheels via gearing and does not come disengaged unless you (the driver) disengages it. Both wheels are locked together regardless of the terrain or wheel speed. One wheel can be off the ground and the other wheel will still have 'drive'.

Because the LSD is always in use and doesn't require any input from the driver, it's the only factory optioned traction device that's designed for street usage (on pavement).

The e-locker can only be engaged in 4WD - so you can't use it on pavement (never use 4WD on pavement).

If you're going offroad, the e-locker is the best choice to have.
If you're looking for traction device for daily driving on the street and some traction for minor offroading - the LSD is the best choice.
Yes, but why would anyone choose the locker over the LSD?

That's because you will not get equal amounts of torque to both wheels. If one of your rear drive wheels lifts off the ground, while you are going uphill, the drive wheel on the ground might not have enough torque to push you up. Correct? This is based on a bunch of shit that I've read and could be completely wrong.
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Old 04-03-2008, 04:30 PM   #5
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Quote:
Originally Posted by Janster View Post
Try searching this forum or using Google. You'll find all sorts of information about them both.

In a nutshell....
LSD is a Limited Slip Differential that comes in the TRD Sport models and some non-TRD models. It offers traction to both wheels when both wheels are spinning at the same rate. It engages / disengages on its own. The driver doesn't have to do anything.

TRD Locker can only be engaged in 4lo and the driver must engage it. It's often called an e-locker and can only be found in the TRD Offroad models. This is a fulltime locker that engages both wheels via gearing and does not come disengaged unless you (the driver) disengages it. Both wheels are locked together regardless of the terrain or wheel speed. One wheel can be off the ground and the other wheel will still have 'drive'.

Because the LSD is always in use and doesn't require any input from the driver, it's the only factory optioned traction device that's designed for street usage (on pavement).

The e-locker can only be engaged in 4WD - so you can't use it on pavement (never use 4WD on pavement).

If you're going offroad, the e-locker is the best choice to have.
If you're looking for traction device for daily driving on the street and some traction for minor offroading - the LSD is the best choice.
u cant forget the prerunners...no 4lo to have it in to engage the e-locker
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Old 04-03-2008, 04:32 PM   #6
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Quote:
Originally Posted by lsocoee View Post
Yes, but why would anyone choose the locker over the LSD?

That's because you will not get equal amounts of torque to both wheels. If one of your rear drive wheels lifts off the ground, while you are going uphill, the drive wheel on the ground might not have enough torque to push you up. Correct? This is based on a bunch of shit that I've read and could be completely wrong.
Good point... This is pretty much the same impression I was under. I was told the LSD works pretty much like a locker but better. Only problem is when the clutch wears out and 1 time out of 10 when one wheel is off the ground the other one on the ground will not engage correctly.
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Old 04-03-2008, 04:34 PM   #7
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Quote:
Originally Posted by hail-bop Command View Post
Good point... This is pretty much the same impression I was under. I was told the LSD works pretty much like a locker but better. Only problem is when the clutch wears out and 1 time out of 10 when one wheel is off the ground the other one on the ground will not engage correctly.
one wheel off the ground is the extreme. It could be even one wheel stuck in mud, going uphill.

Our LSD is clutch based, but there are other LSDs that are geared. Detroit TrueTrac comes to mind.
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Old 04-03-2008, 04:39 PM   #8
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I myself am a locker rear end kind of guy ( although I don't have one, long story ) because when off road there is nothing that can compete with one in the traction dept. Meanwhile on the road it is an open rear end-- meaning only one wheel has torque, LSD or limited slip diff. has one primary wheel that has torque, and if traction becomes an issue a certain percentage of torque goes to the other wheel, I'm guessing a 70/30 ratio ? both are effective.
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Old 04-03-2008, 04:42 PM   #9
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Quote:
Originally Posted by lsocoee View Post
one wheel off the ground is the extreme. It could be even one wheel stuck in mud, going uphill.

Our LSD is clutch based, but there are other LSDs that are geared. Detroit TrueTrac comes to mind.
So the true track is like the best of both?
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Old 04-03-2008, 04:47 PM   #10
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Quote:
Originally Posted by hail-bop Command View Post
So the true track is like the best of both?
no. It still is an LSD. So there will not be equal torque distribution, but you don't have to worry about the clutch wearing out.
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Old 04-03-2008, 04:53 PM   #11
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Ahhh... I'm gunna have to googel it and read about it.
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Old 04-03-2008, 04:57 PM   #12
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hail bopīs avatar freaks me out lol funny
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Old 04-03-2008, 05:07 PM   #13
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hail bopīs avatar freaks me out lol funny
Ah hahahahah!
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Old 04-03-2008, 05:08 PM   #14
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Funny, i got stuck last night in about 8-12 inches of snow. I was kicking my self the whole time for cheeping out and not getting the TRD with the locking diff. Get the locking diff unless your just driving around town/hwy.
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Old 04-03-2008, 05:19 PM   #15
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So u have the LSD on yours?
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Old 04-03-2008, 05:20 PM   #16
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hail bopīs avatar freaks me out lol funny
Wait a minute... Are u saying i'm not good looking?
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Old 04-03-2008, 08:08 PM   #17
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Quote:
Originally Posted by lsocoee View Post
Yes, but why would anyone choose the locker over the LSD?

That's because you will not get equal amounts of torque to both wheels. If one of your rear drive wheels lifts off the ground, while you are going uphill, the drive wheel on the ground might not have enough torque to push you up. Correct? This is based on a bunch of shit that I've read and could be completely wrong.
It all depends on what you want the locker/lsd for.

In offroad situations....
Doesn't matter if you're going uphill or not... If your e-locker is engaged, both wheels are driving regardless. If one wheel is off the ground... the other wheel is still 'driving' at the same rate & torque. The only limitations to that - is the terrain and/or the strength of the axle/shaft/gears.

The locker will always work and the wheels will always be driven.. but the amount of weight transfer, loose gravel, and poor tires will make that wheel SPIN (lose traction). If you have plenty of traction at the wheels - and the truck isn't moving (for some reason), then the next thing will be breakage (weakest link could be anything, axle shafts, gear teeth, u-joints, etc).
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Old 04-04-2008, 07:04 AM   #18
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Quote:
Originally Posted by hail-bop Command View Post
Good point... This is pretty much the same impression I was under. I was told the LSD works pretty much like a locker but better. Only problem is when the clutch wears out and 1 time out of 10 when one wheel is off the ground the other one on the ground will not engage correctly.
lsd will never be as good as a locker for offroad situations. But is GREAT for on road driving. the locker should not be used on road (unless its snowy or icy). unfortunately there is no such thing as "the best of both worlds". Unless you take one of Jansters suggestions from another thread buy the lsd version then put an aftermarket locker on the front axel. then you will have both and a very capable vehicle. Janster, did you suggest this bacause you have actually done it before?

so basically, if you want supreme off-road performance get teh locker. if your concerns is supreme on road performance get the lsd. what do you want to use the truck for primarily?
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Old 04-04-2008, 07:11 AM   #19
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Even for on-road, I would prefer the locker. I like being in control of what is going on, and you could use the locker only when you need it. That way you have true positive lock on the rear end.

I will probably switch my LSD rear end for an E-Locker when the clutch finally wears out on my LSD.
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Old 04-04-2008, 07:12 AM   #20
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Quote:
Originally Posted by 007Tacoma View Post
Even for on-road, I would prefer the locker. I like being in control of what is going on, and you could use the locker only when you need it. That way you have true positive lock on the rear end.

I will probably switch my LSD rear end for an E-Locker when the clutch finally wears out on my LSD.
Why don't you put it a locker in your front...oh, wait
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