[SPatyna]

Reg: gear change,------- Recentlly switched from 3:54 to 4:10 gears. Also switched from 245-75 16 to 265-75-16 tires. Does anyone know how many tooth speedo gear is necessary for this combination. I haul a 10,500 lb. fifth wheel and decided 4:10 would be to my advantage. Truck is 1994 2wd auto- I am original owner 70,000 mi. with BD#10 plate , no cat. low restriction muffler, huge K&n, no air box , with pyro/ trans temp/ boost/ ( autometer). Any Comments appreciated--- S.Patyna