Well I started this thread. I made this mod to my Duetto in 1970, and have been driving it ever since. No problems shifting - and if you really understand how the syncros and these little straps work, it would be clear that the above comment is nonsense.
All you do is provide a means to accelerate the first gear to match the rotation of the shafts before the dog teeth engage. There is an increase in the radial force on the moly syncro ring, but THAT IS WHAT IT'S SUPPOSED TO DO! You get a slight resistance to engaging, but you give up the GRRRRUNCH of the dog teeth grating on the bronze syncro sleeve's teeth.
It works fine! Over 150,000 miles of "works fine"!.
Whew (wiping perspiration from forehead with back of hand)!! I feel much better now, Robert. It was on the web regarding rebuilding Porsche gears.....probably misinformation like you said.
I've been studying intensely your instructions on the fix, and I was either gonna PM you., but since we're right here, here it goes:
Once I open up my 1st gear, can I simply just order a new arc piece from say, IAP, and add? For some reason, IAP depicts a drawing in their catalog with the parts, but does not highlight (offer) the 1sr gear arc, just the other gears. OR should I (I think you suggest this) simply buy the 2 bits and 2 arcs for say, second gear, and install those 4 pcs into 1st?
According to IAP, only ONE of the bits is different fromthe rest of the gears, not both , as it is explained in your article, unless I am not interpreting it right.
Thanks for your continued and much appreciated help. (I have an 87 spid, if that matters. I think theyre all the same)