Driveshaft angle calculations/measurements made based on the numerous "Driveline 101" articles on the web led me down the path of needing to raise the pinion angle up 2 degrees. I installed 2 degree shims and new U-bolts. This actually did a decent job smoothing out the rear end under acceleration. My after installation measurements made me wish I actually bought the 3 degree shims instead. My pinion angle was off from the "zero" (lead portion of the rear driveshaft) by .8 degrees down. So, I might have preferred a 2.5 degree if one was available.
Wife looked at me disapprovingly after I came back from my test drive. Front end still likes to shimmy around at 65-70 miles per hour. My pride seemed to make me think the shake was lessened in some way. I felt like the rear brakes were doing a lot of the work tonight. May have to revisit the brake proportioning valve setting.
I have noticed on photos of Tundra brakes how the springs pushing the pads away from the rotor surface are set up. It seems there is only one spring, yet it looks like you could double up these springs top and bottom. Perhaps an extra set of springs could encourage the springs to push the pads equally away from the rotor surface?
I am going to try this next weekend with OEM smooth rotors with that wizz-bang black e-coating next week. Anyone tried the extra spring experiment?
