We've undertaken a small run of first gear synchros for 924 type 016/Y and 016/Z type VA and VB, and for 924 Turbo (931) type G31 transmissions. Porsche’s part
number for the synchro was 931-302-301-02 (93130230102), and it has been
unavailable for many years. The synchro ring has a unique chamfered
profile that lets it sit into a channel in the gear without a retaining
circlip. We’ve made the synchro with proper molybdenum coating to its
friction surface, and a manganese phosphate coating of the rest of its
surface to prevent galling of the ring against the gear.
We have also the dog rings for the 016/Y and 016/Z type VA and VB 1st, 2nd, and 3rd gear -- never available before. Please check out our listing for them.
Visit us at http://catellusengineering.com/ for more information.