Improved shifting for side shifters, bolt on? Maybe., Experimenting tonight. |
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Improved shifting for side shifters, bolt on? Maybe., Experimenting tonight. |
Dr Evil |
Apr 14 2014, 10:14 PM
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#1
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
I have had this though for a long time to try and remove as much slop as I can in the shifting system. The tail shifter is a bit trickier, but not impossible. I have a side shifter in my new 914 and so, while I build up a transmission for it to drive to Hershey this weekend (this will be the raffle transmission, BTW. Trial by fire!), I decided to see how simple it would be to remove some of the slop.
First, see how much of a gap there is between the shift selector comb and the rod. This is a huge amount so any bit that can be removed should be an improvement. Step one was to add material to the sides of the comb faces (Yes, Scotty, I welded). Then, I hand filed the faces and re-formed them to a specific profile. The metal that was added was hardened and a real bitch to file. I figured it was worth it. The end result was a much tighter fit. There are a few parameters that I will not go into that need to be respected to get this to work, but the preliminary results were nice on the bench. With the material added and profiled on the faces, the stick throw fore and aft to select gears decreases significantly. There is still refinement that needs to be done on the profile, but so far the preliminary results are encouraging. Next, I will build a jig so I can directly observe and adjust my profile. And I will also be able to see where I can add material to take up the slack that one feels when they are in gear and can wiggle the stick back and forth. Once I get this prototype done and tested, I can do this treatment to any side shift console on an exchange basis and it will be a quick bolt on improvement (I hope). (IMG:style_emoticons/default/happy11.gif) |
Dr Evil |
Apr 15 2014, 11:57 PM
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#2
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Success!
Tonight was very good. I made a jig for evaluating the comb in action. Did so, and got a lot of good data that I used to direct where to add material. I added material, honed the profiles, and saw a marked 90% reduction in the movement that will be translated into lateral movement in the cabin stick shift. The profile for the fore and aft aspect still needs refinement, but with a transmission to finish, and with being freaking close to perfect for what I was trying for, I opted that an 85% reduction in fore and aft cabin stick slop would have to do (IMG:style_emoticons/default/smile.gif) The test tranny is almost done. About 1hr left and then I need to jack up the car and swap them out. I wish I could have gotten a short shift kit in time, but Pelican said 7 days to process order, and the rest of the retailers would have likely been too slow as well. If I can score one at Hershey, I will install it on the spot. I hope to get feed back from several people as they take a turn driving. I am beat, and pretty freaking happy. |
Lo-Fi Version | Time is now: 6th June 2024 - 03:21 PM |
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