Originally Posted By 6bblgt
1971 E-Body:
the "014" axle is a 741 case 7260 pinion w/3.23 ratio OPEN & 10" brakes
the "015" axle is a 741 case 7260 pinion w/3.23 ratio OPEN & 11" brakes

the "016" axle is a 489 case 7290 pinion w/3.23 ratio OPEN & 10" brakes
the "017" axle is a 489 case 7290 pinion w/3.23 ratio Sure-Grip & 10" brakes
the "018" axle is a 489 case 7290 pinion w/3.23 ratio OPEN & 11" brakes
the "019" axle is a 489 case 7290 pinion w/3.23 ratio Sure-Grip & 11" brakes


So what is the trigger between getting a "015" vs. a "018" - my 71 340 Challenger is a 4 speed and Bill's 71 cuda 340 is an automatic yet we both have "015" ????

confused