my r154 transmission wont change gears anymore... im swapping the 2jz into an s13 and im using a r154... i added a shifter extension and after that i tried to put it in one of the gears but it wont go in... all it has is the neutral play... i took it back apart to look at it and i cant move any of the 3 gear selectors inside the transmittion... i dont know if it would be best to have oil in it and installed in the car and try it once its running... or if there is a problem... it went into gear fine at one point.... any help?? thanx