Built tranny with wierd behavior..

[little-razcal]

OK this is puzzling me a little and could use some advice. I've built this car from inside out but don't have experience with our tranny's as of yet. This is a built Shep 4 btw.. I knew this was bound to happen but was hoping it would get me through a season or two. Can't afford a dogbox or I'd definitly have one. So....a little of what happend..

I went to T@T last night trying to dial the car in a tad more and learn how to drive the thing before I turn up the wick. The car is trapping 140 on 29lbs currently. First pass at the top end I noticed my battery light on and the log showed I lost voltage after the 1-2 shift. I determined my alt took a crap and started arranging how I was to get this thing home. I drove the car while I still had voltage outside the track and to a local parking lot. Shut the car off and waited for my buddy with his trailor to come rescue me at 11:30 at night.. (SORRY Tony!!)
When he arrived I go to back it out of the spot and It is stuck in gear. I get it in reverse somehow, back it up then cant get it to go back into first or back in neutral. I pop the shifter boot thinking it might be a linkage problem and the cables are fine both inside the car and in the engine bay. I removed the cables from the shifter linkage on the tranny and I noticed I cant move the linkage arm from reverse (forward/back) , or up and down. It usually moves up and down freely but it was completly locked. I managed to forcefully after some time get the car to roll in neutral but had to force the arm back with a lot of force. It feels like the entire inside of the tranny is locked. This is with the car off, on, clutch in, and clutch out.. I managed to pull it on the trailor and get it home back in the garage. Then........ today I go out to get my gopro and for some reason checked the linkage on the tranny. It goes in all gears by hand and moves up in down freely!!! Somehow the thing is no longer locked up. I put the shifter cables back on and started the car just to see if she moves on it's own. She does! So WTF went on?
The tranny didn't break during a pull, the tranny locked (?) while I was parked waiting on the tow. Now after the tow, she's fine again? How is this? What would unlock this? Bouncing on the trailor?

The setup all has around 700 miles on it. I have no idea what my power is, but trapping 140 I'm gonna guess around 500-525whp..The tranny shifts fine at 9000+ rpm fwiw.....

7.25" QM twin
Shep 4 Evo 3 1st (12-15 passes)
Shockproof lightweight / MT90
New OEM TOB
New Master
New Slave (1G)
New shaved fork
Braided clutch line

I can't imagine whatever it was locking this up won't happen again. I gotta get this thing up and running before the shootout. Throw me your thoughts if you want to guide me the right direction. If I need to pull it apart I will, but would like some guidance on what to look for. Could this be a clutch issue?

 

[nfernotalon]

Have you rebuilt the clutch pedal linkage yet?

 

[little-razcal]

This was on my later to-do list. How could this cause this? With the car off it does it..

 

[forcefed86]

Pedal wouldn't cause that.

Sounds like you had something break and wedge in the gears that may have free'd itself. Possibly a gear tooth/teeth.. shift fork..etc. I'd drain the fluid and look for metal.

Are you sure the clutch is disengaging 100%? Can you depress the clutch and rev to 7k without the car creeping forward?

Good luck! Congrats on the 140 trap!