The return spring actually doesn't apply centering force from 1-2 gear shifts, only 5-reverse. If you look closely at the design of the spring and how the shifter works you'll see this. The return from 1-2 is actually achieved through the upper and lower bushings, wave spring, and gaskets on the shift lever itself. I always thought this spring was broken on my original transmission but when I removed it I found the spring to be perfectly intact. It was only once I replaced all the bushings and other equipment in the shift level did everything tighten up.
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