A few questions on ARB/Harrop lockers/ Toyota part numbers for oem locker switch-and special buy on ARB

[40Man]

Through a group buy on T4R I can get an RD152 ARB locker and compressor for $845, which seems like a really good deal. I've also been looking at the Harrop e-locker from Cruiser brothers. I've seen a lot of people like the ARB. Anyone have experience with the Harrop? Thoughts? I was leaning towards the Harrop but this seems like a very good price.

I also understand that the oem locker switch can be added/used for the Harrop (and ARB with a slight modification). Has anyone done that on the 200? I would love to keep a factory look. I've done some searches but haven't found a lot of good info. Just trying to get my ducks in a row before I decide which route to go.

I also understand that the non-US 200 has a locker switch. Does anyone have the part number as well as the number for the replacement surround for the right lower dash? I swear I have seen it on here but can't find it.

Finally, are people mounting their air under the hood near the brake master cylinder, or somewhere else?

TIA

 

[indycole]

I have Harrop lockers and have been quite happy with them. I did explore using the OEM locker switch but ultimately never found a good place to install it and thus run the lockers through my sPod. I also looked into the RoW parts without any success, but that'd be a cool avenue if you find a lead. There's a number of folks on here who run ARB and a good number who run Harrop as well. Both will do the job and both have pros/cons. The Harrop does take a bit of wheel rotation to engage but it's nothing crazy. My air compressor is mounted between the fuse box and the firewall on a Slee mount.

 

[40Man]

I have Harrop lockers and have been quite happy with them. I did explore using the OEM locker switch but ultimately never found a good place to install it and thus run the lockers through my sPod. I also looked into the RoW parts without any success, but that'd be a cool avenue if you find a lead. There's a number of folks on here who run ARB and a good number who run Harrop as well. Both will do the job and both have pros/cons. The Harrop does take a bit of wheel rotation to engage but it's nothing crazy. My air compressor is mounted between the fuse box and the firewall on a Slee mount.

Found the part for the cover:
55447-60030-c0

I was about to pull the trigger on the Harrop, but for $845 shipped with a compressor, the ARB seems like a good option.

 

[bjowett]

I no longer consider using ARB Lockers on daily driven rigs. The compressor is noisy, and the seals for the air line inside the diff eventually have issues. I do not have any experience with the Eaton/Harrop, but FWIW, Toyota now uses a similar locking diff in the Tacoma.

The rotary locker switches are 84725-60020 for the F + R, and 84725-60030 for the single. Check the last page of my build for another option to mount two switches.

 

[40Man]

I no longer consider using ARB Lockers on daily driven rigs. The compressor is noisy, and the seals for the air line inside the diff eventually have issues. I do not have any experience with the Eaton/Harrop, but FWIW, Toyota now uses a similar locking diff in the Tacoma.

The rotary locker switches are 84725-60020 for the F + R, and 84725-60030 for the single. Check the last page of my build for another option to mount two switches.

Thanks Brian.

 

[cruiseroutfit]

Yup, we've used the OE switches for ARB and other selectable lockers for a few decades. Pictured here is the 200 option as you're describing. We've got the pigtail harness and instructions for wiring into the ARB or Harrop, available only with a locker, not something we sell loose at this time.

As for the noise of an ARB compressor. Man the 200 Series crew might be getting over the top soft In 20 years of using an ARB I've never thought to myself, "man, I wish I didn't here that few seconds of sounds when I activate my lockers while bouncing down a trail"

 

[Fisher23]

as you may also know ... or FYI to others ... ARB this month has a FREE compressor when you buy an air locker. saw it on arbusa.com when looking for some other arb gear there.

 

[bjowett]

Lol! It does sound soft! The problem doesn't lie with one quick buzz and a quick engagement of the locker... I concur that is a pleasant experience.... but rather when one starts hearing the compressor cycle on and off multiple times. As the miles pile up, the frequency and duration increase... then the gear oil aroma. Then, uhhhggg... diff R&R.

As for the noise of an ARB compressor. Man the 200 Series crew might be getting over the top soft In 20 years of using an ARB I've never thought to myself, "man, I wish I didn't here that few seconds of sounds when I activate my lockers while bouncing down a trail"

 

[sleeoffroad]

There are two things to know about the Harrop lockers. Not knocking the product, just putting the info out there.

1. They unlock and re-lock going from forward to reverse. That is the way the locking mechanism is designed.
2. The carrier size is the same for a lot of differentials, irrespective of the size of the ring gear. So for a lot of the larger diffs like the rear of the 200, the carrier is pretty small since it is made to go through a smaller ring gear. I would rather have a larger carrier and associated insides on a larger diff on a heavy vehicle.

 

[wardharris]

There are two things to know about the Harrop lockers. Not knocking the product, just putting the info out there.

1. They unlock and re-lock going from forward to reverse. That is the way the locking mechanism is designed.
2. The carrier size is the same for a lot of differentials, irrespective of the size of the ring gear. So for a lot of the larger diffs like the rear of the 200, the carrier is pretty small since it is made to go through a smaller ring gear. I would rather have a larger carrier and associated insides on a larger diff on a heavy vehicle.

What Mr. Slee said. Both true as to mechanism and size.

 

[cruiseroutfit]

There are two things to know about the Harrop lockers. Not knocking the product, just putting the info out there.

1. They unlock and re-lock going from forward to reverse. That is the way the locking mechanism is designed.
2. The carrier size is the same for a lot of differentials, irrespective of the size of the ring gear. So for a lot of the larger diffs like the rear of the 200, the carrier is pretty small since it is made to go through a smaller ring gear. I would rather have a larger carrier and associated insides on a larger diff on a heavy vehicle.

Bingo. Harrop used the guts of the Eaton Dana 30/35? (I'd have to look at my Eaton meeting notes) carrier setup for their Land Cruiser variants. Great option for some, potentially a weak link for others.

 

[RyanR]

Lol! It does sound soft! The problem doesn't lie with one quick buzz and a quick engagement of the locker... I concur that is a pleasant experience.... but rather when one starts hearing the compressor cycle on and off multiple times. As the miles pile up, the frequency and duration increase... then the gear oil aroma. Then, uhhhggg... diff R&R.

I got similar feedback from a local shop when looking for regear and locker quotes. They stated there is a known internal airleak problem with the ARB's and they would not cover internal airleak issues under their warranty because of it. I assume a compressor cycling issue would be due to a slow airleak and the compressor needing to cycle to maintain engagement?

It is still sounding like this is my best option. I assume if the locker leaks and pressure cannot be maintained the worst that happens is you unlock and have an open diff? That sounds like a better option while way out in the sticks than potentially blowing up the carrier in the Harrop. I am running 34's, I wheel hard and now will be towing 1,500lbs of trailer down the trails with me too. Inconvenience is one thing, getting stranded is another with 2 small children along for the ride.

I'd love to hear some input before I spend the money.

 

[cruiseroutfit]

I got similar feedback from a local shop when looking for regear and locker quotes. They stated there is a known internal airleak problem with the ARB's and they would not cover internal airleak issues under their warranty because of it. I assume a compressor cycling issue would be due to a slow airleak and the compressor needing to cycle to maintain engagement?

It is still sounding like this is my best option. I assume if the locker leaks and pressure cannot be maintained the worst that happens is you unlock and have an open diff? That sounds like a better option while way out in the sticks than potentially blowing up the carrier in the Harrop. I am running 34's, I wheel hard and now will be towing 1,500lbs of trailer down the trails with me too. Inconvenience is one thing, getting stranded is another with 2 small children along for the ride.

I'd love to hear some input before I spend the money.

Internal carrier leaks are not common on the ARB, known or unkown. They rarely leak internally and generally the cases we've seen with internal leaks are either really old ARB's (we have customers with 30+ year old ARB's, hell mine are 18 years old) or get some debris working through the fluid such as broken gear bits, bearings that have come apart, moisture, etc. I for example have never warrantied a locker because of internal leaks, it's always been on 5+ year old lockers and rare at that. For example we've sold hundreds of Air Lockers in the last few years along, we've sold ~20 bonded seal (the internal ARB piston ring) in the last 10 years and many of those were lockers that didn't come from us.

The more common leak is either the seal housing o-rings (now actually quad rings) or the bulk-head fitting. The seal housing is a troubling leak as you have to open the axle back up to repair. That said with a clean install (and the newer bulkhead fitting kits) leaks are rare overall. We've shipped 100+ complete 3rd members w/ARB's in the last few years, zero come-backs. I've replaced seals in my personal ARB's once in the last 18 years. I'll do them again next time I'm in the axle for service. Poor installs (dirty, unseated seal housing, fluid contamination, etc), the seals can fail much quicker.

The ARB rarely fails to engage with leaks, the compressor can generally outwork the leak BUT it's either running frequently (as opposed to a few seconds when you engage) or constantly. Either way it doesn't leave you stranded as it either works or its open-diffed. Clear as mud?

 

[RyanR]

Internal carrier leaks are not common on the ARB, known or unkown. They rarely leak internally and generally the cases we've seen with internal leaks are either really old ARB's (we have customers with 30+ year old ARB's, hell mine are 18 years old) or get some debris working through the fluid such as broken gear bits, bearings that have come apart, moisture, etc. I for example have never warrantied a locker because of internal leaks, it's always been on 5+ year old lockers and rare at that. For example we've sold hundreds of Air Lockers in the last few years along, we've sold ~20 bonded seal (the internal ARB piston ring) in the last 10 years and many of those were lockers that didn't come from us.

The more common leak is either the seal housing o-rings (now actually quad rings) or the bulk-head fitting. The seal housing is a troubling leak as you have to open the axle back up to repair. That said with a clean install (and the newer bulkhead fitting kits) leaks are rare overall. We've shipped 100+ complete 3rd members w/ARB's in the last few years, zero come-backs. I've replaced seals in my personal ARB's once in the last 18 years. I'll do them again next time I'm in the axle for service. Poor installs (dirty, unseated seal housing, fluid contamination, etc), the seals can fail much quicker.

The ARB rarely fails to engage with leaks, the compressor can generally outwork the leak BUT it's either running frequently (as opposed to a few seconds when you engage) or constantly. Either way it doesn't leave you stranded as it either works or its open-diffed. Clear as mud?

Totally clear, thanks Kurt! That is extremely helpful information and gives me a lot of peace of mind and better understanding of the potential risks. From your feedback it does concern me that the shop I got quoted thinks this is a chronic issue as it sounds more like chronic poor installation.

 

[cruiseroutfit]

Totally clear, thanks Kurt! That is extremely helpful information and gives me a lot of peace of mind and better understanding of the potential risks. From your feedback it does concern me that the shop I got quoted thinks this is a chronic issue as it sounds more like chronic poor installation.

To be fair... it was well known shops that installed these too

Yes, that is the air line coming out of the bottom of the axle

Yes, that is the bulkhead fitting jammed into a diff stud, no way to put the air line on

I could dig up more.

 

[cruiseroutfit]

Circling back on this thread after remembering to snap some pics inside the cab

 

[Atwalz]

Circling back on this thread after remembering to snap some pics inside the cab

View attachment 1953128

I need that OEM locker switch for ARB front and rear lockers.

 

[DesmoPilot]

Has anyone looked into the new Elocker4 design? It seems that this version from Eaton does not engage/disengage when changing directions. Eaton released versions for Toyota a few months ago. 14217 for the front and 14213 for the rear.

ELocker4 locking differential

The Eaton ELocker4 is an electronic, selectable differential designed for high-performance off road applications. Learn more about electric locking differentials.

www.eaton.com

Thoughts?

 

[cruiseroutfit]

I need that OEM locker switch for ARB front and rear lockers.

We stock them and use them often. We just set up the new Lexus J201 Concept build with that same setup for the F/R lockers too!

The switch housing is part# INT55447

Dash Locker Panel - OEM Toyota - Fits 2008-2021 200 Series (INT55447)

Cruiser Teq is the premier provider of high quality OEM, Japanese, and aftermarket Toyota Land Cruiser parts and accessories.

cruiserteq.com

The locker switch itself is part# ELEC60020
(not on the new site yet but you can call 801-563-1277 and order, we also stock the terminal kit for that locker switch)

 

[Atwalz]

We stock them and use them often. We just set up the new Lexus J201 Concept build with that same setup for the F/R lockers too!

The switch housing is part# INT55447

Dash Locker Panel - OEM Toyota - Fits 2008-2021 200 Series (INT55447)

Cruiser Teq is the premier provider of high quality OEM, Japanese, and aftermarket Toyota Land Cruiser parts and accessories.

cruiserteq.com

View attachment 2467126

The locker switch itself is part# ELEC60020
(not on the new site yet but you can call 801-563-1277 and order, we also stock the terminal kit for that locker switch)

View attachment 2467124

Ordered over the phone. Thanks.