At 106*F your no load charging voltage should be no greater than 14.2V, 15.17V is way too high, you are overcharging, sounds like your field transistor is partially shorted.Battery test result: voltage 12.58 volt. Measured 811 CCA. Rated 730 CCA. Temperature 106 degrees Fahrenheit
Charging system test result: no load 15.17 volt 2.9 amp. loaded 14.59volt 1.9 amp. Ripple 44mv
Starter test results: voltage 11.51. Amps 132.2 ttime 2.26 seconds
All I can say as about nine years ago, no longer made in the USA, made in China someplace.
They no longer replace the voltage regulator, just replace the entire alternator.
Looks like you have two problems, the alternator and the battery, like Robby said, should not be leaking at that terminal, does have vents. If you had caps, would learn the electrolyte is low.
China does not have to put up with the EPA, OSHA. ERA. the IRS, high property tax bills, and chipping in with high health insurance cost, so can outbid us buy a penny a unit. Also a 40 hour week with vacation and holiday days off. So another nice factory gathering dust. Consumer pays the price.