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- เผยแพร่เมื่อ 6 ก.ย. 2020
- In this video I show you step by step how to make your Subaru an AWD beast. This mod will lock your center diff so you can go off road with ease. Big thanks to the guys at subaruforester.org for helping out with this modification.
As I state in the video, this ONLY works for the 4eat transmissions.
I changed the link to the resistor, anything 2.5 to 4ohm and above 15w is good to use
Here is the switch I used: amzn.to/3ija4B2
Here is the black switch: amzn.to/2GDyOGe
Here is the resistor: amzn.to/3spg7bD
Wire strippers: amzn.to/3e5lCHd
Wire: amzn.to/3m5qBLp
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Great video! I had heard about this mod, so happy that I found your video showing how to do it.
Can't wait to do it on my lifted '03 SG Forester.
I appreciate this video so much! Have been waiting for a nice easy walk through step by step video for a while now as i wasnt to sure going of paper alone.
Cheers!!
I did this on my 06 outback, had to make some modifications but the test matched up to yours. Great video.
Carling makes that switch with a 12v powered illumination.
Thanks for making this video. I'm almost at the end, and I hope you explain the technical aspect of this for those of us who can understand it. I'll check your channel out to see more. Great video.
I love your forester, it looks so nice!!! And this is a really cool feature you’ve set up for your car 😁
This is great! I am going to do this mod on my Subaru soon.
Thanks for the video! worked great on my xt.
Hey man. Just stumbled across this. Good to see you got it working nicely. Will have to link this vid when the next person comes to the forums asking about the centre diff lock👍
Hey man. Sounds like you are on a subie forum. I see some people saying don't bother just put the trans in 1 for a locked 50/50 split but does this not allow for 50/50 split into all 4 speeds? (I have a 99 Legacy SUS, 4eat).
What an awesome video.
Thank you for this insight
I'm definitely doing this for my trip to the Arctic Circle.
thank you for this insight,is work good on my Forester 2008 no turbo 👌
I would probably use crimp spade terminals for the wires going to the switch. This lets you rewire if you get the connections wrong, makes the connections easier, and makes it easier to replace the switch.
yes and a ring connector going to that ground above the fuse panel
It was a pretty decent explanation of this mod, however you misspoke a bit in your initial description of the AWD system. Some older Subarus had a viscous coupling in the rear differential and all non-STi AWD manual transmission models have one in the center differential, but none of the automatic transmission models have a viscous center differential. The automatic transmissions use a multi-plate clutch pack to shift power front to back. The standard models have something like a 90/10 front to rear nominal torque split, with up to 50 percent of the power being sent to the back if the wheel speed sensors detect slipping at the front wheels. The automatics with the VTD system have a more performance oriented 45/55 front to rear nominal torque split and are capable of shifting more power back and forth as you accelerate and brake, as well as when the wheel speed sensors detect slipping.
Basically this mod has you activating the clutch pack from the more common 90/10 system so that it sends as much power to the back as it can by locking that clutch pack together to give you a 50/50 torque split. While it has the same net effect, it is not the same as a true locking center differential as it relies on the friction of the clutch pack rather than actually mechanically locking the front and rear output shafts together. As such, the performance of this "locker" is entirely dependent on the health of that clutch pack and how well you maintain your automatic transmission. That said, it can be a useful mod in situations where you know you are going to have wheel spin since you can "lock" the center without having to wait for the front wheels to slip.
Some people have done similar things in the past to completely disengage that clutch pack to make their Subarus FWD in an attempt to get better fuel efficiency. I personally saw this on an SVX once that I was considering buying, but changed my mind when the switch broke during the test drive.
Thanks for pointing this out regarding automatics and their MPT clutch versus manuals with their viscous limited slip centre diff - I was about to do the same and you explained it well!
Older models (BH) with VTD had center differential coupled with a clutch pack, but I don't think any outback had locking or LSD rear diff
@@matusg914 I don't know about the Outback, but some 90's era Legacy's and early 2000's era Forester XT models came with a speed-sensing viscous coupling type rear LSD, as did most WRX models. The STi (and I think some limited edition WRX models) came with a mechanical torque-sensing rear LSD (like the Torsen differential).
@@matusg914 B12 model H3 is with VTD and rear LSD diff :)
It’s a well spread lie about 90:10 front to rear, but is actually pro-active AWD and is engaging differently every single second. 90 to 10 ratio is in IDEAL conditions, for example you are cruising on the highway in nice weather middle of July, speed locked on 75mph with cruise control in straight line, in that case is 90to10, but the very next moment you swirl the steering wheel to overtake someone, your car is already changing the proportions of power distribution.
Nice job, Charlie
Wondering if you could blow a fuse if you try using the lighter while the diff lock is engaged. Also a plug in spotlight could trip it. Cell phone charger probably not.
Great mod! Can't wait to try it.
Take off the orange button cover from the base and put in same size 12v halogen or led bulb.
3-5 mm size bulb fits there.
Had this on a legacy sedan, we had crazy problem, had to go to two mechanics to figure out two shops ago put different sized tires on the back. Actually improved my mpg to leave the car in FWD, would just put my car in neutral, flip to AWD and i could climb the mountain that was my sister's washed out vertical churt driveway
Okay watching more of your video, I realize you're doing a way different mod than I did. All I did was stick spade connectors and a switch into the fuse that forces fwd
Interesting video
Thank you well made presentaion!1 Is the something similar or the CVT transmissions, OR those do NOT need this mod?
17:30 bro that exhaust sounds so good lol
Great video! I have a 2014 Forester 2.5i Premium, will this work on my car? And if so, also change pin #4? Thank you.
Very innovative
I think I would take mine and have an ARB air locker installed in my 2002 outback all-wheel-drive this way I have full control when their rear-ends locked-in or unlocked it won't damage anything electrical or on the transfer case or possibly other important things
Is this wire going to the Transfer Duty solenoid? I was looking for the Electrical Specification for TCM of my 2001 Subaru Outback H6 3.0 L.L.Bean, it has 4eat but doesn't have VDC. Is it still possible to do the same with it?
I just found your video!! So awesome!! Do you happen to know if I can do this to my 97 with a 4EAT?
Will you make a video of you using this up hills to see how much of a difference of torque?
That wiring diagram is for a non illuminated switch. One would need an additional one or two additional contacts for the light ( one contact is automatically grounded through the existing contact that would be noted as ground). Any idea if there is power available on one of your contacts when switched on or if there is a contact that grounds when turned on. Either way you could wire an LED indicator and mount it to the blank panel next to the switch or perhaps hide it somewhere up in or on the instrument cluster.
This reminds me of the mod I did to enable cruise control on my car. Two contacts are used to the steering column and running through several resistors. The resistors tell the ECU wether to engage or disengage cruise while the other two resistors control increase or decrease speed. One also needs to add the factory switch that enables either cruise control or speed minder as long as the factory harness has the contact assembly clipped behind the switch panel.
Oh! that purrs like a kitten!
A great tutorial is this would be the same as turning off the Vehicle Dynamic Contol? thanks
Hey! Could you tell me pls, what is the type of your AT, is it a one with VTD where the main torq comes to the rear wheels (TV)? Or a one where the main torq comes to the front wheels (TZ)? Mine is the last one, TZ1. Front wheels rotarte always, up to 100% of the torq is carried to the front. I was wondering if I can do the same with my Subaru as well...
Hello,
Looking at your hood you subaru is a turbo but you used the non turbo resistor. Also I can't find a 4 Ohm, 15 Watt resistor on amazon.
Looking greeat!!
I have a impreza b3 2L but manual dearbox , you know if can i do something like this ?
Will this affect the normal operation when it’s turned off? Will it never lock the diffs when off and only lock if on?
Hi do you know if it can be done on a 4 gen? the one after the one you use.
Does the diff lock work in while in Reverse gear? Or is that not advised??
Will this work 9n the outback 2008 2005 with the 3.0 engine and at gearbox?
Great video imma do this on my 06 Outback tommrow does anybody know if it will go smoothly with my model
I have a 2016 base Subaru forester standard. Would this work in this model? I know you talked about the 4 speed auto, but I'm still good old clutch and shift.
Question I noticed in my 05 foz XS auto that there’s a wire taped to the wire for my cruise/defogger buttons, is that a pre wire for something? Like if I put another button there?
Do you have to turn the steering wheel all the way when turning it on to bind?
Can this modification be made to a 2008 outback 2.5xt?
Thanks for sharing!
Where can I find the 4ohm 15kW load resistor?
Could not find it in Aliexpress or EBay..
I have a 2012 subaru forester with a TCM, which says DT on it, which 2 wires are you cut into? Please see picture
On a non turbo 02 Impreza why would I install a 100 ohm resistor? Seems to me like I would just leave it open.
Can I do this to my 2017 crosstrek? Or do I have to buy lockers?
The way u explain things makes any idiot guy like me think I can do it 😂 awesome video!!
My 2008 outback with 4eat has a different wiring configuration and no white and green wire do you know the correct wire to tap into.
Hi, I have an xv 2019, the 4×4, the computer gives it power to whichever wheel it wants, and I had several situations where the computer decided not to let it give power to the rear wheels, and it only worked forward, and the car would sink in the sand in front, and the rear wheels did not work.I saw that a button can be made Give a physical command to the computer or to the chalk to let the mocks back work, have you done something like this, can it help me
I cant get it to work on my 2000 subaru outback. I wired it up just like in your video but it still doesnt work. could you help me?
Will this mod work on a 2003 JDM legacy wagon 2.0 turbo
would this work on a 2015 subaru outback? and other than cost why do this as opposed to a actual rear diff locker?
Will you please help us see if this will work for other cars, 2015 impreza here!
Subaru Forester 2009? will it work?
Cool modification, if you lock the TCU into staying in that 50-50 mode won’t that cause premature wear on the center diff? I’ve noticed that Subaru has been listening to people like you. Newer cars that feature X-mode essential have something like this and more baked in. Also nice to see a Forester XT, I wish Subaru still made an XT version or at the very least put turbo in the Wilderness edition.
It actually causes more wear on the center diff unmodified, because the TCU is only engaging the clutch pack when it detects wheel slippage. That causes a lot of shock loading, which can destroy the clutch pack under heavy use. The idea for the switch is to engage the diff before you go off-roading, so it's not rapidly slamming it together.
@@imitt12 would using Xmode in conjunction with this mod be feasible or even possible?
@@shaneclack3234 AFAIK the Xmode overlap these mod...so it its not really needed. If anybody have more info on it please tell me.
@@artenalata2009 I find it interesting how many/few hardcore builders and modders tinker with this platform. I have an extensive background with jeeps and 4x4 trucks, so theres a neverending source of info for this kinda stuff. Wife recently got a Crosstrek so im knee-deep in research trying to make it more offroad capable... Maybe I should start drafting and engineering some mods/features for these things...
I’m wondering how long that computer module will last with a physical switch flipping current off and on.
Hi...it s the same for outback 2010 ?please can u help
Will this work on a 1999 Subaru Legacy L 30th Anniversary Edition Auto??
Go to a junkyard, and nab one of those factory fog light buttons and do the same
Do you have a wiring diagram for the mod for a non turbo engine. Thanks
Has anyone done this on a SGXT as I want to do it but cannot find that resistor in Australia only the USA. How important would it be to get the correct one? Any auto electricians here?
How does this compare to the snow/mud setting in newer Subaru's?
My 02 Forester S with 4EAT would lock front and rear if you manually selected 1st or 2nd gear without any mods. You really don't need a 50/50 split once you're at 3rd/4th gear speeds. Not sure how this works with a CVT.
Well that locks the front to the back but does nada left to right. Subaru does that by using the abs system to apply the brakes of the wheel that is spinning to send power through the open diff to the other side. Subaru locks front to back when the fronts slip anyway so I guess your switch gets it a little earlier....
Please someone tell me why there is a resistor to ground? This i dont understand.
I wonder if this will work on a 2012 forester?
I'm assuming this doesn't work for 2021 Forester with a CVT transmission
Hello, Could you tell me I own Subaru Baja 2003 Turbo AT with Sport Shift, it is kicking when shifting from 2nd to 3rd gear, master told me to replace Transmission Computer which I can't find, mine is 31711-AJ000 , Could you give me any advice which replacement TCU might work with my Baja, transmission code is : tv1b4mhfaa , and rear diff is 4.444 VISCOUS LSD. Thank you in advance
I thought the "Hold" button on my '06 SG9 2.5 XT does that?
Would this work on a 2016 Forester?
Can this mod be doable to the 2022 or 2023 Ascent? Thanks
I wonder how all this works with a manual? TCU is with automatics only right?
Has anyone tried this on a gen 4 ra WRX with the FA20? The thing I like least about this car is that unless you have snow tires it is garbage in any kind of snow. I want to be able to lock the diffs when stuck and raise the suspension a few inches, then it will actually be a good mountain car
Can i put on rx300 Awd?
Can this be done to a cvt equipped subaru?
can this be done in a 2021 outback CVT
can this cause any undue strain on other components?
Would you do this for us at a cost? For those of us that do not have that me mechanical inclination????
Hi,
Do you think it's work for subaru XV ?
Does it work with manual transmissions.
Hi will this work on 2004 fxt????
Hello. i followed your instructions and i have this mod for a year now and it works flawlessly. The only thing that i wish is to be able to install a ligth on my dash when i have the switch to ON. I wonder if there is any way to do this on the existing setup
How anout a lit switch? Or a lead from the load side of the engaged pole of the switch to a led bulb in the dash. Might should work?
Can you do this with a manual transmission?
will this work with any subaru
This sounds great, can i do this on my -08 na outback with manual gearbox..?
???
Will this work on. 1999 forester 4eat?
Hii
Thank you for the awesome Video.
So can you tell me if this work on a 2005 2.5xt Manual?
greetings
No, your manual already does 50/50 power split at all times.
Does anyone know how to do this for the 5 speed?
Video says 4ohm 15watt resistor but the link takes me to 3ohm 15 watt resistor. Very nicely done, will you be posting a video of your Subaru offroading with this mod active?
Do I have the 4eat transmission? I have a 2024 OBW.
That's alot of Tapes!
can i do it in forester 2024-5?
Has anyone done this and can in xv 2019 help what are the pros and cons?
Is send prosece for 2009 subaru forester
Interesting video!
Do you think this would be possible on a 2014 outback 2.0D manual transmission?
Best regards
// Mikael
Yeah, I'd like to know this too. I have a 6spd Manual 2012 2.0D Forester Premium which I imagine be same mod for yours if possible
Has anyone tested this mod on newer models?
works on 2006 Subaru Outback non turbo automatic transmission
Donor Work on your Subaru outback 2006 2,5 i automaticik
What about a 03 forester with a 5speed
Your FXT doesn't have a center differential. It runs a transfer clutch. For Foresters, only the 07/08 FXT Sports 4eat runs a center diff; VTD diff. I have a spare VTD conversion if you wanna buy. It's much better in driving performance and lockup with that switch mod. Video Demo on my TH-cam page.
Okay so I've watched your video 12 times and I've been all over the Internet pulling my hair out I have a 2005 Subaru outback non-turbo and I can't find the wire to cut to install this switch on my TCM. Nothing on the Internet or any diagrams or pinouts gives me any specific color of wire
From the looks of it, this would work with a 2016 manual Forester right?
No, only autos 😕
(Manual Foresters use a viscous centre LSD, which is entirely mechanical and has no electronics.)