Shimming helical quick change gears // Winters Quick Change Tech

Quick change rears have a natural whine caused by the spinning of the straight-cut change gears. For street cars and trucks, helical-cut gears will quiet the whine, but they must be installed with shims to reduce stress caused by the rearward thrust of the helical-cut teeth. In this video we explain how to install our shim kit in your quick change rear, and we also explain why helical gears work well for low-stress, street-driven applications but not for banging gears or racing at the track.

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[robertsamspon]

why not add the shim to the gear cover side? is there a reason to put them under the gear like in the video?

[Polemicist_]

So if you do this, does it make helical gears race safe?