Does this seem fair?
11-19-2014, 05:36 PM
#11
There is also X-treme inc in Fredericksburg, VA X-Treme Inc
11-19-2014, 05:54 PM
#12
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11-19-2014, 06:14 PM
#14
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Hmm okay, what do you know that I don't? I will say I don't want anything other than a selectable locker up front and I can say I've never found myself in a situation where I needed a front locker. Essentially, it's either a LSD up front or open diff because I can't afford an OX cable locker and I don't want air lockers or electric lockers.
11-21-2014, 10:32 PM
#15
From what I've found in my research (I may be wrong, i'm not an expert on lockers) it seems that lsd's work on friction similar to how a manual clutch does. Over time the surfaces wear down and are less effective.
11-21-2014, 11:41 PM
#16
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The truetrac uses helical gears, not clutches. Clutches wear out when tires spin offroad, the gears in the truetrac do not. I can't comment on how 'independent' it was, but here is some independent testing on the various limited slips.
http://www.eaton.com/ecm/idcplg?IdcS...Name=CT_139762
And as far as truetrac being a wise decision goes - it completely depends on individual opinion, budget and use. If someone 'needs' a locker, there is no substitute. But realistically, how many of the hundred thousand members of this site actually 'need' lockers? Ya know, the people who spend a significant portion of their offroad time with tires in the air? 5%? 2%? Less? For the vast majority of people, a pair of truetracs will be all the traction they will ever need. And if you read a few dozen of the truetrac related threads, you will see people with them are following people with selectable lockers with no issues at all. For the price point (a 'pair' of truetracs cost less $$ than a 'single' selectable locker), the truetrac is a great traction device, and well worth considering. But it certainly doesn't have the bling factor of being able to brag about your selectable lockers ...
11-22-2014, 06:01 AM
#17
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11-22-2014, 10:48 PM
#18
Thanks for that. I did read somewhere (which I can't find at the moment) that lsd's have points of friction similar to how a clutch works. I wasn't insinuating it is a "clutch". Maybe I read it wrong, but it made sense when I read it. are trutracs a proprietary brand name then? Or are there similar setups that are mistakenly called trutracs? Maybe it's a situation where people call tissue kleenex? (Hope that made sense)
I for one favor the trutrac setup and from what I said above about lsd, don't prefer a lsd. The cost savings of a trutrac versus a selectable locker is so great it makes sense to go that route. I read something on this forum from someone recently that stood out to me. He said that trutracs help you to not get stuck in the first place where a selectable locker would then be needed.
I would say that for the best possible peice of mind a selectable would be nice. I've thought that when I do end up upgrading from my open diffs I would go trutrac in the rear and a selectable in the front. Or just trutrac front and rear. Of course I'm sure the more extreme you wheel, the more a selectable would be the best choice. I don't wheel that hard and won't unless I somehow become independently wealthy lol. On a scale of 1-10 with 10 being very extreme I probably have wheeled around a 5 but would like to be able to do 7 or maybe 8. I'm in norcal and haven't been to the rubicon yet but from all the vids iv seen of it, I'd probably not want to try anything much harder than that
I for one favor the trutrac setup and from what I said above about lsd, don't prefer a lsd. The cost savings of a trutrac versus a selectable locker is so great it makes sense to go that route. I read something on this forum from someone recently that stood out to me. He said that trutracs help you to not get stuck in the first place where a selectable locker would then be needed.
I would say that for the best possible peice of mind a selectable would be nice. I've thought that when I do end up upgrading from my open diffs I would go trutrac in the rear and a selectable in the front. Or just trutrac front and rear. Of course I'm sure the more extreme you wheel, the more a selectable would be the best choice. I don't wheel that hard and won't unless I somehow become independently wealthy lol. On a scale of 1-10 with 10 being very extreme I probably have wheeled around a 5 but would like to be able to do 7 or maybe 8. I'm in norcal and haven't been to the rubicon yet but from all the vids iv seen of it, I'd probably not want to try anything much harder than that
11-22-2014, 11:01 PM
#19
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Maybe you need a little more research? The truetrac is owned by Eaton, the same people that make the detroit locker, and there is no 'non-Eaton' truetrac. (Tractech used to make the truetrac until Eaton bought the company 10 years ago.)
The truetrac uses helical gears, not clutches. Clutches wear out when tires spin offroad, the gears in the truetrac do not. I can't comment on how 'independent' it was, but here is some independent testing on the various limited slips.
http://www.eaton.com/ecm/idcplg?IdcS...Name=CT_139762
And as far as truetrac being a wise decision goes - it completely depends on individual opinion, budget and use. If someone 'needs' a locker, there is no substitute. But realistically, how many of the hundred thousand members of this site actually 'need' lockers? Ya know, the people who spend a significant portion of their offroad time with tires in the air? 5%? 2%? Less? For the vast majority of people, a pair of truetracs will be all the traction they will ever need. And if you read a few dozen of the truetrac related threads, you will see people with them are following people with selectable lockers with no issues at all. For the price point (a 'pair' of truetracs cost less $$ than a 'single' selectable locker), the truetrac is a great traction device, and well worth considering. But it certainly doesn't have the bling factor of being able to brag about your selectable lockers ...
The truetrac uses helical gears, not clutches. Clutches wear out when tires spin offroad, the gears in the truetrac do not. I can't comment on how 'independent' it was, but here is some independent testing on the various limited slips.
http://www.eaton.com/ecm/idcplg?IdcS...Name=CT_139762
And as far as truetrac being a wise decision goes - it completely depends on individual opinion, budget and use. If someone 'needs' a locker, there is no substitute. But realistically, how many of the hundred thousand members of this site actually 'need' lockers? Ya know, the people who spend a significant portion of their offroad time with tires in the air? 5%? 2%? Less? For the vast majority of people, a pair of truetracs will be all the traction they will ever need. And if you read a few dozen of the truetrac related threads, you will see people with them are following people with selectable lockers with no issues at all. For the price point (a 'pair' of truetracs cost less $$ than a 'single' selectable locker), the truetrac is a great traction device, and well worth considering. But it certainly doesn't have the bling factor of being able to brag about your selectable lockers ...
11-23-2014, 12:57 AM
#20
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The 'helping not get stuck' comment was probably a quote from the gentleman at Dynatrac? Great little story...
You also touched on the Bias (friction). Here is another quote that might help explain it. I like the comment about the JK's electronic BLD system working seamlessly to help the Truetrac provide traction to the spinning tire.
The Truetrac will act like an open diff and freespin if a tire is lifted off the ground (or zero traction). The BLD is sensing spin in these situations and clamping the brake. The TT senses brake (as traction) and power moves across the diff to the side that is on the ground.
To better understand this I'll offer an explanation of bias.
Truetracs have a bias ratio of prox 3-1. This means that 3 times the torque from 1 side can be transferred to the other. A tire in the air provides zero torque back to the diff so zero will be transferred to the ground. When brake is applied the diff is sensing torque from that axle and 3 times that torque is being put down on the ground. The more brake is applied (meaning the lifted tire won't turn even when throttle is applied) , the more torque transfers. The question is- Is enough torque being transferred to help move the vehicle? Sometimes yes, sometimes no. If the other axle is providing some help that means the axle with the lifted tire doesn't need to provide as much torque to make the rig move.
Clear as mud, right?
To better understand this I'll offer an explanation of bias.
Truetracs have a bias ratio of prox 3-1. This means that 3 times the torque from 1 side can be transferred to the other. A tire in the air provides zero torque back to the diff so zero will be transferred to the ground. When brake is applied the diff is sensing torque from that axle and 3 times that torque is being put down on the ground. The more brake is applied (meaning the lifted tire won't turn even when throttle is applied) , the more torque transfers. The question is- Is enough torque being transferred to help move the vehicle? Sometimes yes, sometimes no. If the other axle is providing some help that means the axle with the lifted tire doesn't need to provide as much torque to make the rig move.
Clear as mud, right?