These results are based on calculations and aren't 100%
*3490 is The weight of An IROC,
Total weight means you have to figure in yourself
**This calculation assumes the car's transmission is in drive or 1:1 ratio, not overdrive.
Example:An Auto IROC has TH-700R4 transmission with overdive.
The OD ratio is 0.7:1. For a 4.11 rear end, plug .7 and 4.11
into the Over Drive Gear Ratio Calc. Then plug that answer in for your gear ratio