Originally Posted by Mile high JDF
Jack up the car, rotate your wheel one full turn and count how many times the driveshaft turns.
+1 did this for my car. Speedo was off when I bought the car. Figured out I had 3.73s. Bought a tuner and now all is good.
Borla S-Type stingers, BAMA SCT tuner, K & N Typhoon CAI, Classic Design Concepts light bar, MACH 1 chin spoiler, MACH 1000 w JVC Kvw 500 HU, plastidipped hood scoop, wing & Premium GT rims, painted calipers, 3.73 gears, black Bullitt fuel door, MMD hood struts, sub-frame connectors, SVE uca & lca, Power Stop drilled/slotted rotors