1994 Cadillac Seville TURNS OOF WHEN I PUT IT IN GEAR

Check the transmission range sensor adjustment, and drop tranny oil pan, is the filter on? Or loose at the bottom of the pan?
ENTERING SELF-DIAGNOSTICS 1. Turn ignition on. Simultaneously push OFF and WARMER buttons on Climate Control Center (CCC). Continue pushing OFF and WARMER buttons until segment check appears (about 3 seconds) on Instrument Panel Control (IPC). 2. When segment check appears (all segments glow), system has entered self -diagnostic mode. Release both buttons. Driver Information Center (DIC) will display diagnostic codes. Diagnostic code level displays PCM codes first, followed by IPC, ACP, SIR, TCS and RSS codes (if so prompted). 3. To proceed to desired level, press and release CCC HI (fan up) button for "yes" or LO (fan down) button for "no". Depress LO button to go to next test level (i.E, IPC, ACP, SIR, TCS? Or RSS?) Or depress OFF button to return to next selection in previous test level. 4. To exit diagnostics, press AUTO or DEFOG button on IPC. System will go back to normal vehicle operation. DISPLAYING TROUBLE CODES 1. Trouble codes appear in ascending (3-digit) numerical order and are prefixed by "P" (PCM), "I" (IPC), "A" (ACP), "R" (SIR), "T" (TCS) or "S" (RSS). A final digit of either a "C" (current) or "H" (history)" will also be indicated on every code. Diagnostic code level displays PCM codes first, followed by IPC, ACP, SIR, TCS or RSS codes (if so prompted). 2. For complete list of available PCM trouble codes, see PCM TROUBLE CODES table. If no codes are present for a system, a "NO X CODE" message (with X being system, i.E. "P", "I", etc.) Will be displayed. If communication line to a component is not operating, a "NO X DATA" message will be displayed, indicating that IPC could not communicate with that system. 3. To continue with system diagnostics, see SERVICE MODE OPERATION. To exit from SERVICE MODE and go back to normal vehicle operation, depress AUTO or DEFOG button on CCC. NOTE: Failure of any segment to glow may result in inaccurate test results. Replace any inoperative segment display before proceeding with self-diagnostic process.