Re-engineering the Shift Spring
Can we pool our collective experience and semi-mass produce a kit to replace the problematic shift lever spring with a coil?
I just broke my second spring and am not looking forward to the possibility of another breaking in an inconvenient location (like the Mojave Desert).
If the Indiana R&D team (Chuck and Footgoose) can figure out how to source stuff, I will contribute the pre-selector. I'll even send you a whole transmission if you think you need it. Of course, I'd like it b
Alright, stress test complete. 250,000 down and up shifts without issue on the spring with 28 degrees preload. (over stressed)
Here is my report from the reliability lab.
This is what I'll recommend.
.071 dia. spring with 2.45 active coils. The spring calculator says this spring has 62.5 degrees safe travel. Total travel of this spring in service is 39+15= 54 degrees.
Max safe torque of this spring is 6.8 inch lbs.
At 54 degrees, this spring generates 5.88 inch lbs.
At 54 degrees it's in
