Quote: Mike, a friend helped me drill out the 7290 yolk and attached heavier straps and grade 8 bolts/nuts the day before I went to the track. I removed the yolk for drilling. I knew I had the 489 with a crush sleeve. The pig was just freshened with new bearings & pinion seal last fall. I re-installed the yolk and torqued it to 190 lbs. I was told by the person who re-built my pig that he torqued it to 225 ft. lbs. The yolk definately felt different(tighter)after I torqued to 190 I was gonna step it to 225lbs after I reached 190 but stopped because it felt tighter. The next day after driving it to the track,it broke on the starting line after 1 easy pass to break in the new slicks. Do you think I probably crushed the sleeve further,and changed the pre-load? John
If I were to race(or even street drive) the 489 I would go with the solid sleeve... did you change the pre-load... most likely... if I need to pull the yoke I torque it back to spec(or damn close).... JMO on the preload... but either way... a heavy car and 4 speed with slicks and have good bite.... something has to give
