carfreak85 Posted October 12, 2015 Share Posted October 12, 2015 I'm wondering what the spline count is on the front differential stub shafts of an XT6 transmission. Will EA81 axles slide right on, or do I need to swap out the stub shafts for EA81 parts? Link to comment Share on other sites More sharing options...
Crazyeights Posted October 12, 2015 Share Posted October 12, 2015 They (XT6) are the same as the EA82 Turbo or 25 splines. I have swapped in standard EA82 23 spline stubs from a dead "push-button" 5 speed donor. It has worked well for 7 years so far in my EJ swapped '83 GL.Wagon. Link to comment Share on other sites More sharing options...
idosubaru Posted October 12, 2015 Share Posted October 12, 2015 +1 same as EA82T highly unlikely, you're probably talking about a manual trans, but if it's an automatic the stub shafts just pop right out, only held in place with a circlip, and they can be swapped easily. Link to comment Share on other sites More sharing options...
Numbchux Posted October 12, 2015 Share Posted October 12, 2015 +1 same as EA82T highly unlikely, you're probably talking about a manual trans, but if it's an automatic the stub shafts just pop right out, only held in place with a circlip, and they can be swapped easily. BUT, there are no direct 23-spline options for the 4EAT. The only way to get a Subaru auto with 23-splines is the 3AT, which use the same stubs as the MT. The only difference between them is the groove for the circlip/snapring....so a skilled lathe operator could modify a pair of 23-spline MT stubs to work in place of the 4EAT stubs (I have a pair of stubs modified in just such a manner on my workbench). 1 Link to comment Share on other sites More sharing options...
carfreak85 Posted October 13, 2015 Author Share Posted October 13, 2015 Ok, good to know. Besides the 3.900 final drive on the XT6, is there any substantive differences in gearing between a FT4WD 5MT XT6 transmission and an FT4WD RX 5MT? Link to comment Share on other sites More sharing options...
Numbchux Posted October 13, 2015 Share Posted October 13, 2015 Yea. They're the same as a PT4WD EA82 trans. Same 1st gear, other 4 are all a bit taller. It will yield lower cruising rpms in 5th than the 3.7 RX trans. Link to comment Share on other sites More sharing options...
carfreak85 Posted October 13, 2015 Author Share Posted October 13, 2015 I can't seem to find the old gear ratio chart for the old school chassis. Anyone still got the link? Link to comment Share on other sites More sharing options...
Numbchux Posted October 13, 2015 Share Posted October 13, 2015 http://www.ultimatesubaru.org/forum/topic/81963-ea8182-mt-gear-ratios/ Link to comment Share on other sites More sharing options...
carfreak85 Posted October 14, 2015 Author Share Posted October 14, 2015 Hmmm, that doesn't seem to show the EA82 S/R 5 speed trans, or the XT6 trans either... Link to comment Share on other sites More sharing options...
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