down shift

I'm selling my Auto-Blip that works on 2015 - 2020 Ford Mustangs with a manual transmission. $200 local pickup in the DFW area, or shipped in the US for $225. Excellent condition. From Auto-Blip's website: AUTO-BLiP is a patent pending, advanced electronic module that automatically blips...

Need some help diagnosing my damaged differential. Wanted to see if any experts in here might know what is wrong since I know next to nothing about differentials. Car is a 2015 mustang gt, 6r80 with the 3.15 differential. ~125k miles on diff. Started noticing noise when going from drive to...