At the track this past weekend I managed a 13.2 @107mph which is the good news. The bad news is I shifted to 2nd from 3rd instead of 4th at 90+ mph. Well I hopped down the track like crazy and no my rear end is whining like crazy on deceleration. I assume I screwed the pinion or bearings. So I am going to live with the noise since winter is coming.

Here is where I need some input. I have a 4:10 right now but will be installing a Procharger over winter as well. I already find the 4:10 a little steep for the city. Was thinking of going 3:90. Will there be a significant difference? ALso while I have the rear end apart is there any point in upgrading the axles or the LSD? Have people had these fail after installing a blower?

Thanks!