Data

Resource: Subaru CV Axle Database

Constanti Velocitate

While researching for a potential modification (making hybrid axles), I found it very difficult to get good information on OEM Subaru CV axles. Most of the info was scattered across various forums and even then it was inconsistent. So to make heads or tails of this information I decided to put it into a table.

I will update this table as a find new information.

YearModelAxle LocationOuter CV Joint Spline Count (Hub)Inner CV Joint Spline Count (Trans/Diff)Shaft SizeShaft Spline Count
(Outer/Inner)*
Axle LengthSource
1999ForesterRear242523mm#5
2000-2002RSRear242523mm#1
2001Legacy Outback
2002-2005WRX (Sedan)Front272528mm29?#1, #7
2002-2005WRXRear242524mm21 or 22
2004STIFront2727?
2004STIRear30/30#6
2005-2007STIFront2729?/30
2005-2007STIRear27
2006-2007WRXFront2725#1
2006-2007WRXRear28
2008-2014WRXFront27
2008-2014WRXRear2825/27#3
2008-
2014
STIFront27
2015-2020STIRear27
2004FXTRear242522#4
*Shaft spline count is very inconsistent and can vary greatly within the same model year.

Sources

  1. https://forums.nasioc.com/forums/showthread.php?t=367808
  2. http://wordpress.suberdave.com/?page_id=275
  3. https://www.wrxforums.com/threads/r180-into-08-wrx.23397/
  4. https://forums.nasioc.com/forums/showthread.php?t=2048240&page=8
  5. https://forums.nasioc.com/forums/showpost.php?p=3969011&postcount=2
  6. https://forums.hybridz.org/topic/73182-subaru-sti-r180-differential-and-axle-conversion-revised/
  7. https://thefactoryfiveforum.com/showthread.php?11112-Internal-CV-Spline-Mismatch

2 comments on “Resource: Subaru CV Axle Database

  1. I built hybrid axles for one of my wagons so I could run an r180 with 5×100 4pot/2pots. I combined 22 spline 04-05 wrx rear axles with 06 STI inner cups using Suberdave inner races.
    I had to buy a bunch of donor axles before I found some with the correct shaft spline count. Two sets I purchased were definitely oem from bugeye wrx cars and the axle shafts had 21 splines.

    Like

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