When it doesn't cost as much as you initially thought.
This would be best read with the accompaniment of continuous swearing. I've worked with Marines, so I put my swearing skill level somewhere between Corporal and Sargeant. Too bad I'm not any good at recording video on my camera.
I found the torque spec on the VB&P web site: 40 to 45 foot pounds. Also instructed to tighten evenly. I also remember reading Gary's differential posts on cracking covers with wrong sized bolts. Since I had no idea of where these came from so I proceeded slowly. 12 pounds all around, then 18, then 22, then colossal sound of metal breaking. Begin swearing.
As a bit of background, I'm in the process of moving from the Bay area of California to Boston. A differential rebuild doesn't easily fit in the program right now.
Once I was able to get my swearing slightly under control, I crawled back underneath and, after wiping the forehead blood off of the undercarriage, I notced the the retaining plate split in two. Been a long time sine I've been thrilled with breaking something in half.
VB&P has a sale on this weekend too
Edit: Important clarification. The retaining plate is aluminum and not steel