Gear linkage 964 turbo porsche 1992 - 1990 Porsche 911 Carrera

SOURCE: Porsche 944 Turbo won't go into gear when motor is running.

Hi mate. I'm no Porsche expert but the most common diagnosis would be clutch failure. If you can shift (even some) gears with the engine off then this would be plausible. Before looking at the complete clutch, try the master and/or slave cylinder, it's more likely to be the master. Pop the bonnet and check the level of brake fluid in the reservoir, there is no "clutch fluid", it's just brake fluid. If it's below the minimum line, top it up then see if it engages gear. Get it checked out, but tell the mechanic your theory, he'll soon confirm it if it is.

SOURCE: 1990 Porsche 911 Carerra 2

YEP SHIFT LINKAGE LOOSE OR WORN NEED ADJUSTMENT.ADJUST THE SHIFT LINKAGE BY POSITION THE SHIFT LEVER IN NEUTRAL .REMOVE THE REAR TUNNEL COVER IN FRONT OF THE REAR SEAT.PULL THE RUBBER DUST COVER FORWARD ON THE SHIFT ROD.LOOSEN THE CLAMP BOLT ON THE SHIFT ROD.MOVE THE TRANSMISSION SELECTOR SHAFT ALL THE ITS LEFT STOP,KEEPING IT IN NEUTRAL.WITH THE TRANSMISSION STILL IN NEUTRAL . MOVE THE GEARSHIFT ROD TO THE RIGHT TO ITS STOP.TIGHTEN THE CLAMP BOLT TO 18 FT LBS.TEST THE SHIFT LEVER PLAY SHOULD BE THE SAME IN ALL GEARS IN ALL DIRECTIONS.

SOURCE: my 1992 porsche 964 serpentine

hello there
in your case ,most likely you need to replace the belt sensor which rides on the belt it self...
let me know if this helps?
Proporsche