What was found
BEFORE TAKEOFF, NR 1 FUEL TANK SHOWED 8700 LBS AND NR 2 FUEL TANK 8800 LBS. IMMEDIATELY AFTER TAKEOFF, AIRCRAFT WAS VERY RIGHT WING HEAVY AND NR 1 FUEL TANK SHOWED 3200 LBS. BEGAN CROSSFEEDING FUEL ENROUTE AND DIVERTED TO SMF. PERFORMED WALKAROUND INSPECTION OF AIRFRAME, NO ABNORMALITIES NOTED. DRIPPED BOTH L AND R FUEL TANKS. NR 1 STICK 8.0 = 2475 LBS, BOTH SIDES. BOTH COCKPIT AND SPR GAUGES IN AGREEMENT. CHECKED OPS OF BOTH PUMPS, X-FEED VALVE, CHECKED OK. DEFUEL VALVE VERIFIED CLOSED. POST - FUEL STICK READINGS = NR 1 STICK - 17.0 = 5700 LBS = SPR AND COCKPIT GAUGES AGREE.