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Old 07-12-2010, 02:30 AM   #1
Deus ex Machina
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Unhappy HELP! Transmission will not shift into gear unless engine is off!

I have a 2002 WRX. After replacing the transmission, it will NOT shift into any gear unless the engine is off. Also, the clutch pedal is not smooth; it appears to "catch" on something repeatedly as it's coming up. If the engine is started with trans already in gear, it appears to be able to utilize said gear, but will not shift out of it until the engine is off again.

Details:
  • shifts into gears fine while off
  • pressing the clutch pedal moves the shift fork
  • if started in gear, it will work in that gear but won't shift out
  • if started in neutral, any attempts to shift into gear cause RPMs to fall but no grinding noises
  • vehicle speed sensor is not installed (broken accidentaly, will buy tomorrow)
  • I miss driving my subaru.
Please help; I'm incredibly confused and frustrated.

Thank you in advance.

Alex
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Old 07-12-2010, 02:36 AM   #2
Hareball
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Did the shift fork get seated in the throwout bearing when you reinstalled the transmission?
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Old 07-12-2010, 02:42 AM   #3
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Well, I pulled the intercooler off and had my friend press the clutch pedal. At the same time, I stuck a screwdriver into the opening by the top of the shift fork... When he pressed the clutch, my screwdriver got pushed back out a bit.... That would lead me to believe that the clutch is, in fact, getting pulled away from the flywheel...


I'm about to lose it..
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Old 07-12-2010, 02:49 AM   #4
Numbchux
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To clarify, if you start it in gear, the clutch works as it should?

if so, obviously your clutch is working....you say you replaced the transmission...more info. what did it come out of? condition? mileage? anything else?
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Old 07-12-2010, 02:56 AM   #5
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Quote:
Originally Posted by Numbchux View Post
To clarify, if you start it in gear, the clutch works as it should?

if so, obviously your clutch is working....you say you replaced the transmission...more info. what did it come out of? condition? mileage? anything else?
He said if he starts in gear, it will drive but he cannot shift into a seperate gear while the engine is running.
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Old 07-12-2010, 02:58 AM   #6
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If I start the engine while the trans is in gear, that gear works: The car moves and responds to clutch/throttle input.

The second gear on my old trans ended up being blown.. I replaced it with a trans from an 04 WRX with ~100k miles on it. Previous owner said that it worked fine before he pulled it (swapped in either an RA trans or something like that).

I hope hope hope that I didn't buy a broken trans....... I really can't afford this right about now, heh...
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Old 07-12-2010, 03:14 AM   #7
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Quote:
Originally Posted by TongueJack View Post
He said if he starts in gear, it will drive but he cannot shift into a seperate gear while the engine is running.
yea, I saw that, but if the clutch is stuck-engaged, you could move it on the starter until it's running and drive it. it didn't sound like that was the case, but I wanted to clarify.



I'm not entirely sure, my first instinct is that your clutch is working, so it must be something in the trans. but I can't think of anything internal that would cause those symptoms.

Maybe the clutch isn't completely releasing . I've heard a few people say that it's pretty difficult to get all the air out of the system manually. But it's self-bleeding, so it should get better with use. did you disconnect the hydraulic line at all in the swap?
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Old 07-12-2010, 03:23 AM   #8
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I did not disconnect the line at all at during the swap.

Here's my thinking... Normally, shifting into gear while clutch is engaged or partially engaged pisses off the syncros. It grinds and you realize you're an idiot. However, that is not the case in this situation. It is absolutely silent even if I attempt to shift without pushing the clutch pedal in.... That points to internal trans issues in my mind.

Take this with a grain of salt, of course.. I'm a noob when it comes to this sort of thing....


Update: I just noticed that while the motor is on and an attempt is made to shift trans into reverse, the motor ..."torques".. but nothing happens as far as movement goes. As in, as the shifter is pushed into the general area of the reverse gear, the motor twists clockwise. More like "twitches"..

Last edited by Deus ex Machina; 07-12-2010 at 03:33 AM. Reason: Update
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Old 07-12-2010, 03:41 AM   #9
Numbchux
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you're not wrong with that thought process.

HOWEVER. if the clutch is fully released, nothing in the transmission SHOULD be spinning. so it shouldn't make any difference if the engine is running or not.




if it were me, I'd take it around the block, and see if it could be speed-shifted. But, I've had experience doing that (twice limped a car home with a broken clutch cable). If you've never done it before, you wouldn't know if it was reacting normally.
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Old 07-12-2010, 03:46 AM   #10
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Hm.. I might try that... I have nothing to lose at this point.
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Old 07-12-2010, 03:54 AM   #11
Numbchux
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yea, it's possible that the clutch is not releasing entirely, and while stopped the input shaft is spinning so much faster than the output that the synchros won't let you even think about engaging.

if that's the case, then it might work better with the car moving. would help isolate whether it's a clutch or transmission issue.



I don't know the pull-type clutches well enough to suggest what might be causing that issue though......
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Old 07-12-2010, 03:57 AM   #12
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Hm.. As much as I wish that would work, I dont' think I follow. The synchros won't let me shift into a gear if the input/output shafts are way off on speed, but they shouldn't stop me from shifting out of the gear i'm currently in.. Unless I'm misunderstanding something.

In other words, if I start the car with a gear engaged, I cannot shift out of it into neutral until the car is off again...
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Old 07-12-2010, 04:22 AM   #13
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Oh. My. God. It worked (speed shift). You're ****ing awesome; I can't thank you enough. Other than a few squeeks here and there, it runs well!
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Old 07-12-2010, 05:52 AM   #14
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Quote:
Originally Posted by Deus ex Machina View Post
Oh. My. God. It worked (speed shift). You're ****ing awesome; I can't thank you enough. Other than a few squeeks here and there, it runs well!
You mean the clutchless shifting worked, or it works normally now?
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Old 07-12-2010, 07:09 PM   #15
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It works normally now, I meant
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Old 07-12-2010, 09:39 PM   #16
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Question though. Where did you get the trans? Was it rebuilt?
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Old 07-13-2010, 03:51 AM   #17
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I purchased it from another NASIOC member. I believe it had been rebuilt for one reason or another before.
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Old 07-13-2010, 06:53 AM   #18
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Quote:
Originally Posted by Deus ex Machina View Post
I purchased it from another NASIOC member. I believe it had been rebuilt for one reason or another before.
Well that's probably why. Even if you just replace a gear or a syncro sometimes it takes a little bit to get it going. When I just put my new trans in I had tons of problems getting it into gear on the lift and I was worried. Sometimes it even still needs a week or so to break in before it shifts how it should.
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