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Old 08-09-2017, 09:08 PM   #1
bobsagator
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2004 Baja Turbo MT

Default Replace Rear Differential

Can anyone confirm if a 07 WRX rear diff will work on an 04 Baja Turbo manual? From what I see HERE the diffs are compatible.

I am asking because my rear diff acquired a knocking and my mechanic is leary to crack it open. I'm fine with replacing it, if I can, and ran across THIS in the for sale section.

Are there any other reputable places to get a rear diff shipped to me?
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Old 08-09-2017, 11:19 PM   #2
2slofouru
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My mistake, you need to just verify the rear diff ratios of both vehicles. They are interchangeable physically though, so will swap easily. https://forums.nasioc.com/forums/sho....php?t=1682110

Last edited by 2slofouru; 08-09-2017 at 11:25 PM.
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Old 08-11-2017, 10:55 PM   #3
bobsagator
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Yeah, the 07 WRX is 3.7 and the Baja is 4.444, so no good. Back to the drawing board.

Anyone know a reputable place to order one?
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Old 08-12-2017, 01:15 AM   #4
Patrikman
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Quote:
Originally Posted by bobsagator View Post
Yeah, the 07 WRX is 3.7 and the Baja is 4.444, so no good. Back to the drawing board.

Anyone know a reputable place to order one?
All you need is a rear diff with LSD and 4.444 gears. Manual trans Forester XT, Outback XT, most NA Foresters or Bajas or Outbacks that are auto with the 4EAT should also have 4.444.
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Old 08-13-2017, 02:18 AM   #5
Baja_Gernaut
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^^^^^nice to know^^^^^^
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Old 09-20-2017, 02:58 PM   #6
bobsagator
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So, just to be clear for those of us with little brains, any 4.444 with LSD will work? Is it safe to assume that a Forester XS or XT locking differential that states 4.444 works, whether MT or AT?
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Old 09-20-2017, 03:02 PM   #7
bobsagator
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Or even an AT Baja without turbo that has a 4.444? I need to see if these are LSD.
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Old 09-21-2017, 09:56 AM   #8
bobsagator
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Okay, looking at the FSM a Baja non-turbo AT has 4.444 with LSD but says it's VA-Type, while all Baja turbo (MT and AT) have 4.444 with LSD but are T-Type. So I assume I need to focus on getting a T-Type, but how do I know which Forester/Legacy differentials are T-Type?
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Old 09-21-2017, 12:49 PM   #9
Hawk296
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They should be interchangeable as long as you use the correct axles for each. So if you switch from VA to T you need to get the T axles as well. Same goes from going from a T to VA.

You can spot the difference by looking at them. The T type have bolt in carrier bearing races while the VA are thread in (like in the trans). They should also be labeled.
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Old 09-21-2017, 01:27 PM   #10
bobsagator
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Thanks Hawk, so you know if there is a listing somewhere that states which diffs are VA versus T? I mean I can look up the bearing races on a part supplier website, but a listing would be easier...
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Old 09-21-2017, 02:37 PM   #11
Hawk296
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Honestly, ide try and stick with a t-type on the turbo unless you cant find one. The bearings and things are a bit beefier if I recall but if you get a great deal on a VA type with axles it's possible.

I think most of the limited slip diffs you find will be the T type vs the VA. If any of the ones you are looking at have pictures you can tell pretty easily. If on the sides where the axles attach (where the axle seals are) have plates bolted in its a T-type. If there are no bolts but a ribbed ring with a lock tab its a VA type.

From what I have seen, Limited slip VA type are kinda rare.

Unfortunately I am not knowledgeable enough on the topic to know what years and models had what type and ratio rear end.

Last edited by Hawk296; 09-21-2017 at 02:48 PM.
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Old 09-21-2017, 06:48 PM   #12
bobsagator
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Thanks again Hawk!

I found an 04 FXT MT diff and went thru the parts list and they are pretty much identical to the Baja so it should be just a plug and play. Hopefully the Baja is back on the road soon.
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