I have an 83 xj550 and the trip meter is accumulating way too many mile on a trip but the odometer is working correctly. Ill rest the trip meter at a full tank of gas, go say 15 miles and look down and there may be 815 miles on the trip. Found a relpacement guage cluster (used of course) and it does the same thing. Any ideas? you can email me at sg_frost@msn.com too