toastintx
Well-known member
ok need a little help 1973 Mach 1 with FMX 3 speed auto and standard 2.75 rear gears. my problem i think the rpms are way too high. at 60 mph running 2600 and at 70 mph a +3000. this is too high right? what can cause this. the cars seems to be running ok but wow. i was thinking about going with 3.50 gears but that would be crazy rpms. whats my problem. oh and running 26.6 inch tires