S13 SR20DET will not crank after T.O. bearing/rear main seal replacement

[1JZRX7]

Hey guys - been lingering for quite some time (since roughly 2004) and just ran into a problem that I have yet to see covered with an S13 SR20DET in a S14 chassis.

Basically, was able to take care of the throwout bearing and rear main seal in about 2 hours, got everything hooked up, and was able to start the vehicle and drive it out the shop. Was able to shut it down and crank it again 2 other times in the lot area I was (did not exceed 25-30 MPH).

Once I went to leave and drove down the road for some food, I noticed my vehicle would not crank when leaving diner.

So, SYMPTOMS -
- Everything on dash illuminates.
- Fuel pump primes
- no movement from starter
- No clicking of any time

Is there anything on the trans that would keep the vehicle from starting? Is there anything I could have knocked loose during trans removal/install? I've done it quite a few times and never ran into this problem, so I'm a bit baffled as to what has happened. Also, SR trans, not KA.

Thanks for the help, guys!