Trans Light And Strange Problem, C34 S2 Rwd

[powerhearse]

I've had this happen a couple times over the past 6 months; including some strange immobilizer activity.<br /><br />The first time I had the "AT" (auto trans) light come on and I noticed that the car stuck itself in 3rd gear or higher; it seemed to lock out 1st and 2nd.<br /><br />I tested it with the sequential, but the car wouldn't go into first or second gear.<br /><br />So I turned the car off and on again to try to clear it in case it was a computer fault, and the alarm/immobiliser went off. And I couldn't stop it. Had to manually disconnect alarm and battery and reconnect before the car would start.<br /><br />Haven't had the alarm thing happen since but the AT light/locking out 1st/2nd has happened once since.<br /><br />Any ideas? <br /><br />Not sure if its related but the engine seems to "stick" a a bit at 1500 rpm when cruising; I increase throttle and boost increases but revs stick at 1500 before suddenly jumping to 2000. Seems to have a slight vibration when this happens too.<br /><br />I'm thinking it might be trans related but not sure

[Ben C34]

The revs 'sticking' is due to the torque converter locking, and is completely normal.

The trans staying in 3rd is is limp mode, means you have a problem

in adelaide mv automatics is the only man to see.