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Old 09-25-2018, 08:29 PM   #26
Big-E
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I thought about this for my 2006 WRX.
2008+ WRX knuckles
Two possible issues:
ABS tone-ring alignment on axle; new axles to match
ABS tone-ring sensor and connecting to vehicle
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Old 09-27-2018, 08:38 PM   #27
motorbykemike
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re-pin sensor wires/plug

two wires , "polarity" does not matter

use the lgt knuckles
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Old 10-07-2018, 06:42 PM   #28
T-37
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update coming soon. Long story short, I went with 08 WRX knuckles. Minor modifications required to the knuckle, and an 8mm spacer between the axle and bearing is required...hopefully I'll have it out for a drive and alignment this week. (Waiting on some new wheel studs to arrive tomorrow because I ****ed one up.) Detailed post and pics coming soon. This ended up being a very cheap upgrade
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Old 10-08-2018, 12:52 PM   #29
TXwrxWagon
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Im very interested in this "solution" and hopefully finding one for the rear as well.

~Rob
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Old 02-04-2019, 05:05 PM   #30
jexeffectz
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Quote:
Originally Posted by T-37 View Post
update coming soon. Long story short, I went with 08 WRX knuckles. Minor modifications required to the knuckle, and an 8mm spacer between the axle and bearing is required...hopefully I'll have it out for a drive and alignment this week. (Waiting on some new wheel studs to arrive tomorrow because I ****ed one up.) Detailed post and pics coming soon. This ended up being a very cheap upgrade
Any updates?
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Old 02-04-2019, 05:32 PM   #31
T-37
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Quote:
Originally Posted by jexeffectz View Post
Any updates?
I guess I never really updated this thread.

This is what I did:

Replaced the front uprights/knuckles with salvage* uprights from an 08-14 WRX. Then modified the knuckles and my existing wheel speed sensors, and fabricated a spacer (dimensions here) between the axle and bearing in order to keep the wheel speed sensors happy. *I slapped on new bearings just to be safe.

This is all referenced from here: http://bbs.22b.com/forums/showthread...eavy-Track-use

All of the details are there, so I never got around to formatting my own post.

So far it's been great. Total cost was around $400 if I remember right, so it's a fairly cheap upgrade. They're obviously not the same as the STi bearing, but it's a nice low-midrange upgrade, that at the very least will be a lot easier to replace next time around.

Last edited by T-37; 02-04-2019 at 05:38 PM.
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Old 02-24-2019, 10:24 PM   #32
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Quote:
Originally Posted by T-37 View Post
I guess I never really updated this thread.

This is what I did:

Replaced the front uprights/knuckles with salvage* uprights from an 08-14 WRX. Then modified the knuckles and my existing wheel speed sensors, and fabricated a spacer (dimensions here) between the axle and bearing in order to keep the wheel speed sensors happy. *I slapped on new bearings just to be safe.

This is all referenced from here: http://bbs.22b.com/forums/showthread...eavy-Track-use

All of the details are there, so I never got around to formatting my own post.

So far it's been great. Total cost was around $400 if I remember right, so it's a fairly cheap upgrade. They're obviously not the same as the STi bearing, but it's a nice low-midrange upgrade, that at the very least will be a lot easier to replace next time around.
So the spacer is just for the speed sensor? i guess im confused on why there needs to be any mods unless the axle didnt fit properly, i thought about doing this because im trying to do rally. I dont care about abs.
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Old 02-25-2019, 02:04 PM   #33
T-37
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I think the outer stubs of the axles are different for the GR vs the GD (among other things). When installing the axle nut, I was able to stake it normally with the spacer in place. Without the spacer, I think the stub would have stuck out further from the hub and would not be able to be staked.

If you weren't concerned with ABS and didn't want to use a spacer, you could possibly try GR axles, but you would want to verify the length beforehand.
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Old 02-25-2019, 02:19 PM   #34
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It is hard to say, the length measurements in the FSM are between boot clamps, and the joint types and boots vary, so axles that are actually the same length have different measurements. 06 sti axles for example are listed as being 40mm shorter than 06 wrx sedan, but overall they are the same length.

However, the track width between the GD sedan and 08-10 impreza/wrx are essentially the same, so those axles probably work, but that would only apply to GD sedan control arms and 05+ transmissions that use male inner cvs.
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Old 08-26-2019, 12:04 PM   #35
sniper1rfa
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Reviving thread to add that I'm working on swapping over to 2008+ spindles, and building a converter for the ABS sensors. Should be able to use either GD axles with a spacer (mcmaster-carr part# 91201A039) or GR axles because I will be using the OEM 2008+ wheel speed sensors.

Git repository is here: https://github.com/sniper1rfa/Subaru-ABS-converter

Hardware:
subaru 28313AG020 knuckle
subaru 28313AG030 knuckle
subaru 8x 901000238

McMaster 2x 91201A039 spacer for old axles, not needed if you're replacing them with new ones. Might need to cut a chamfer on the inside edge facing the axle.

New 08+ wheel bearings OEM or aftermarket since they're easy to replace.
New 08+ wheel speed sensors


ABS plugs for 2007
ABS plugs for 2006 or earlier impreza
ABS receptacles
These are for intercepting the ABS signals and then sending them back into the main wiring harness.

Optional: new 08+ axles.

Here's the schematic, using an arduino teensy as the microcontroller. This can output an adjustable period (but not adjustable waveform) signal that's compatible with the older ABS module, but reads off the newer hall sensors and magnetic tone ring. It's also got an output for VSS just in case. Should probably be optocoupled, but isn't currently.

Note: the schematics aren't finished and may contain errors that diverge from my functioning breadboard.







VR tone ring is 44 teeth. Magnetic tone ring is 96 teeth.




Last edited by sniper1rfa; 09-20-2019 at 11:51 PM.
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Old 09-20-2019, 11:28 AM   #36
sniper1rfa
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Success, running 08+ hubs with functional ABS. Have a VSS output (or GPIO if you want) as well for using 08+ transmissions.








Git repository is here: https://github.com/sniper1rfa/Subaru-ABS-converter

Last edited by sniper1rfa; 09-20-2019 at 11:50 PM.
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Old 09-20-2019, 12:08 PM   #37
T-37
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Awesome, great work, and thanks for sharing
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