Selectable diff locker debate (aftermarket).

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@jonheld - for lowering the air pressure: would you happen to have info or a part number for a 70psi pressure switch?
I used a regulator between the compressor tank and the air solenoid manifold, but I had a York OBA setup in that truck. I have the same OBA system in my LX450, but I have factory lockers. Personally, I think ARBs are the way to go. I still don't understand why folks pay a premium for factory lockers. They're annoying.
 

John McVicker

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Amazon product

This is the one I am using on my single motor ARB compressor. 2+ years so far & no issues.
 

GW Nugget

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I've replaced 4. But there was a bad batch of seals from 2016-2020ish that ARB basically acknowledged. The new seals I think are viton and fine.
Well there you go, 2016 to 2020 had a bad batch of seals... wait that batch lasted for 4 years???:hmm:
 
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Amazon product

This is the one I am using on my single motor ARB compressor. 2+ years so far & no issues.

According to the regulator I have on the Locker Manifold my ARBs don't shuttle until 95-100 PSI. I set my OBA up at 120 ON/150 OFF and a 175 blow off valve.
Where I'm going with this is, if you limit your system to 70-100 psi, your ARBs may not reliably cycle.

image of Locker Manifold: installed
Uabh3IMl.jpg


on the bench, inlet is fitting with GREEN ring:

nx5bvdul.jpg
 
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According to the regulator I have on the Locker Manifold my ARBs don't shuttle until 95-100 PSI. I set my OBA up at 120 ON/150 OFF and a 175 blow off valve.
Where I'm going with this is, if you limit your system to 70-100 psi, your ARBs may not reliably cycle.
That has not been my experience with ARBs. I ran 68-70 psi for many years, and there was never an issue. If you drop below that, it became intermittent.
 
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Maybe they'll wear in, I'll have to pay attention to that. No sense hitting an o-ring with more pressure than it needs.
 

John McVicker

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Maybe they'll wear in, I'll have to pay attention to that. No sense hitting an o-ring with more pressure than it needs.
Yep, that’s my thinking. To change those bad seals means you will have to open the diff.
 

nukegoat

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That has not been my experience with ARBs. I ran 68-70 psi for many years, and there was never an issue. If you drop below that, it became intermittent.
I prefer higher pressure so I can crash lock them with impunity
 

Broski

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Steve did you tear it down yet ?
Inquiring minds want to know what actually broken in there.
Pictures or it didn't happen ;)
 

Broski

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Its been a rough past year for Steve's rig. Snapped rear axle, drive flange, DS, crack front control arm bracket, now front pinion?
You forgot the busted front drive shaft flange 😝
 

mudgudgeon

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Its been a rough past year for Steve's rig. Snapped rear axle, drive flange, DS, crack front control arm bracket, now front pinion?

He should have got a 3FE!
 

baldilocks

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Steve did you tear it down yet ?
Inquiring minds want to know what actually broken in there.
Pictures or it didn't happen ;)
No sir not yet. I’m sure I’ll put time into it over my next four days off beginning Friday. I did some interesting reading yesterday in some older threads and also newer about building a front 9.5 using the rear housing from a 60. But that’s another thread because I would want to hijack this one.
 

studawg

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Harrop says in this video.... "A misconception that the locker will not stay engaged when changing from forward to reverse movement....."



"However the reality is that while there is load on the differential in extreme conditions the axles will in fact remain completely locked."

By this wording, I guess it leaves open the possibility that if you release the brake or throttle or do something for it to become unloaded when shifting or changing gears or rolling backwards while in gear, then the diff can/will unlock?
 

nukegoat

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Harrop says in this video.... "A misconception that the locker will not stay engaged when changing from forward to reverse movement....."



"However the reality is that while there is load on the differential in extreme conditions the axles will in fact remain completely locked."

By this wording, I guess it leaves open the possibility that if you release the brake or throttle or do something for it to become unloaded when shifting or changing gears or rolling backwards while in gear, then the diff can/will unlock?

Yes
 
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No sir not yet. I’m sure I’ll put time into it over my next four days off beginning Friday. I did some interesting reading yesterday in some older threads and also newer about building a front 9.5 using the rear housing from a 60. But that’s another thread because I would want to hijack this one.
You pay to play, indeed a vicious never ending cycle.. =)
 

Broski

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No sir not yet. I’m sure I’ll put time into it over my next four days off beginning Friday. I did some interesting reading yesterday in some older threads and also newer about building a front 9.5 using the rear housing from a 60. But that’s another thread because I would want to hijack this one.
To keep it all Toyota use a semi float rear axle from a 91-92 and weld on the knuckle balls from a standard 80 front axle like @raisinghell2 did on the front axle of his all Toyota DNA Buggy
 
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Harrop says in this video.... "A misconception that the locker will not stay engaged when changing from forward to reverse movement....."



"However the reality is that while there is load on the differential in extreme conditions the axles will in fact remain completely locked."

By this wording, I guess it leaves open the possibility that if you release the brake or throttle or do something for it to become unloaded when shifting or changing gears or rolling backwards while in gear, then the diff can/will unlock?

Yeah, posted that video earlier. Madmatt does a good video where he goes into more detail on this and his experiences with it:

He also talks a lot about an issue he had with a failure case, which like the ARB seals issue above Harrop have subsequently replied to, and put down as a known issue with a bad batch.
 

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