RE: Tow capacities for crown vic
The older crown vic's had a stronger rear axel, however on the newer ones i.e. a 1997-2000, they replaced the axel and rear end that doesnt have the strength to support to much weight, the interceptors have transmission coolers on them but that would only allow you to tow a little more, like 1500lbs, with out one i wouldnt do over 1000lbs for long distances. Air bag shocks wont help because it wont change the amount of weight on the axel.
1997 Crown Vic LX 4.6L V8
2000 Excursion XLT 6.8L V10