camry speedo problems

hi all.i have a 96 jap import toyota camry 2.2diesel automatic.when i go over 70 kph the speedo stops working.if i stop at the lights and take of again it works again till i hit 70.would appreciate any info in helping me fix this problem.does anyone know where the speedo sensor is,i have looked on the gearbox but cant seem to find it.A BIG IRISH THANKYOU TO ALL INFO.:banghead: :banghead: :banghead:

On a "normal" Camry it's on the differential housing in back of the transaxle. Look for wires.