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Guest Message by DevFuse
 

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25 spline axle on 23 spline tranny damage - repair?


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5 replies to this topic

#1 subie_newbie

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Posted 21 January 2007 - 02:40 AM

You all speak the truth!

I got a new axle and it went on just fine! Thanks for all the help!

{original post}

Hey all!

I just picked up my first Subaru (84 GL 4spd dual-range, 2 door hatchback) for the explicit purpose of beating the heck out of it off road. But, first it must go...

The previous owner replaced the front axles, but got a 25 spline axle somehow on the passenger side. Then drove it... the results are predictable, the axle sheared off the roll pin and messed up the splines, although how bad I do not yet know (just got it tonight, only can see with a flashlight). To top it off, I drove it home 40 miles in 4wd because, well, there was no other option really.

So, assuming the tranny output shaft is toasty, what do I need to do? Is there hope I can just put on the correct axle and be ready for off road abuse?

Now to add to the general confusion: If I do need to pull the tranny, what can I do to make the front end LSD or spooled? Anything else I should do? Is it even practical/realistic? I'm not driving the car any at all other than too and from wherever we're wheeling (60 miles most), then in the mud, so day to day isn't a concern. What is a concern: cost. Not really interested in the 5sp swap because it sounds difficult and too expensive for no real gain I can see. If there is, convince me otherwise.

Thanks for helping this newbie out!

#2 edrach

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Posted 21 January 2007 - 10:40 PM

I've seen this happen three times before and in all three cases there was no damage to the tranny stub axle. With any luck at all, you'll just need to pull the wrong axle, clean up the mess and install the correct axle. Good luck with it.

#3 edrach

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Posted 21 January 2007 - 10:42 PM

I've thought about a front LSD so often it's in my dreams. Not practical and I've never heard of anyone doing it. Converting the rear diff to LSD has often been done and is well documented.

#4 Numbchux

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Posted 21 January 2007 - 11:04 PM

a buddy of mine has a FWD impreza (23 spline) and the parts shop (grrr....napa....) gave him 25 spline axles. it just sheared off the roll pin, no damage to the stubs at all.

#5 kingbobdole

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Posted 22 January 2007 - 02:14 AM

I did the same when I first converted my XT6 to a 5 speed.. I had the 23 spline tranny in it with the stock axles... I got the car to move about 2 feet before it snapped both pins and the car no longer moved... it was fun:dead:

#6 RONAN

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Posted 22 January 2007 - 07:05 AM

a buddy of mine has a FWD impreza (23 spline) and the parts shop (grrr....napa....) gave him 25 spline axles. it just sheared off the roll pin, no damage to the stubs at all.


Had the same thing happen to me years ago. Back when Midas offered a lifetime replacement on there halfshafts, they replaced one with the wrong spline and when they backed it out of the bay, the pin snapped. They replaced it with the right spline without any problems.




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