i could be mistaken however i think equa lock was just a ford name for traction loc, i think they are the same? my 1973 shop manuel makes no mention of tracion-lock rather it mentions equa lock, i think thats ford name for it? ::
Equa-loc is NOT trac-loc.... Equa-loc was the predecessor to trac-loc... lasted until... '69 or so... it was meant more for traction control rather than actual power... yes, it will lock up as long as the wheels stay relatively equal in torque... which is great... but if you hit a patch of sand, and the torque gets really high, the wheels WILL break lose of each other and you'll just wear out clutch plates...
Trac-loc on the other hand is built so that as one wheel starts to increase in torque the clutch would grab tighter and pull both of them back into lock. The equa-loc does NOT have this.
If you're doing anything performance, get trac-loc and make SURE it's trac-loc.
re:the wheels WILL break lose of each other and you'll just wear out clutch plates...
El Presidente is on to something here....the trac loc units promoted a smoother transition from the locked to the slip mode, a more gradual torque transfer when turning while reducing the
breaking loose of the tires (due to the extra clutch)....that seemed to plague the Equaloc units.
quite an improvement IMHO and longevity was improved upon.