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ohhhhhhhhhhhhhh. Now I see. You're right. You just saved me a few hours of figuring. Thanks!!

Ed, The method you described was my first reaction too. But that would only accurately model the situation if the tire was not strapped to the tow truck. In this situation the tension in the strap helps the car gain traction by virtually adding weight. The normal force the tire applies is...

Good point Ed. That max torque is available at 4000rpm, which, I'm assuming, is attainable in this specific situation. Norm, I am indeed determining the envelope. In short: I'm trying to figure out if a car strapped to a tow truck can produce enough force to break the tow straps (which go...

Thanks a lot NickE I appreciate your help. So the final drive reduction IS multiplied by the 1st gear ratio. I was unsure if the final gear ratio was the 1st gear reduction (already) multiplied by the axle ratio or if it was a completely seperate reduction. You were right on. I got...

Oh. I think I just reaized part of my problem. 185 ft-lbs must be the engine output torque not the drive wheel torque.

I'm trying to calculate the drive wheel tangential output force of a car and ran into some trouble. Here is the situation. The car is basically locked into place (ie: tires strapped down). I know the horsepower, the drive wheel torque of the car, and the weight on each wheel. I'm trying to...

Ed, I've been in forensics for a few years. I mainly deal with failure analysis and transportation accident reconstruction, but have worked on a fire case here and there. Typically deal with law firms and insurance companies. Sounds like you're on the right track with your new company and...