A bit of a story here. Recently I did a swap on the rear gears on my sons car. We went from the factory 3.08 to a set of new 3.31 Ford performance.
Got everything setup thought I had a really good pattern but after hitting the road it had a slight whine on coast and decel which got worse as it warmed up where it was annoying
So long story short after reading lots of opinions online I ended up redoing the entire setup and changing back to a set of used factory 3.27 gears I had which were in decent condition but had some miles for sure. Happy to report they are dead quiet and work well
Looking back on it now I believe that I had my pinion slightly too deep on the 3.31's and probably needed to set the bearing pre-load at the higher end of the spec.
So what's everyone's opinion on these 3.31's now? They did wear in with a suspect pattern for 500 miles of so. Are they junk ?
The internet chatter I read seems to indicate that they will always be noisy now that they wore in that way. No one wants noisy gears lol
Curious what everyone on this forum thinks ?
Cheers,
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