What was found
(CAN) FOLLOWING GEAR DOWN SELECTION, GEAR TEMPERATURE INDICATION BETWEEN 343-360 C DEGREES ON 3,4,7 & 8. ONE MINUTE LATER AFTER CHECKING BRAKES AND WITH SLATS/FLAPS AT 20/20 AND SPEED "LIAR" ON CPT, PFD THE AIRCRAFT OVERSHOT AT 1,000 FT. EVERYTHING CAME BACK TO NORMAL AND AIRCRAFT LANDED SAFELY. POST MAINTENANCE TROUBLE SHOOTING FOR SLATS/FLAPS COULD NOT BE DUPLICATED. TROUBLE SHOOTING FOR WHEEL TEMPERATURE INDICATED COMPENSATOR BRAKE TEMPERATURE FAILURE.