Dynaflash8 Posted March 26, 2020 Share Posted March 26, 2020 (edited) Does anybody have a 3.9-1 standard ring & pinion set, with or without the carrier, for a 1939 Buick Series 60 Century or the optional set for a 1939 Series 40 Special? It is not the same as a 1938 or a 1940 set. I have numbers, but little faith anybody will have a NOS set. If you do, contact me. Right now I just want a good set that somebody will guarantee has no whine and nice smooth gears. I'm not desperate enough yet to go back to a standard Series 40 4.44-1 set, but getting close. Ask me. Thanks, BCA #55. Edited March 26, 2020 by Dynaflash8 (see edit history) Link to comment Share on other sites More sharing options...
Dynaflash8 Posted March 26, 2020 Author Share Posted March 26, 2020 Nobody has a good 3.9-1 differential for a '39 Century or Special? Man, that's not a good sign. Link to comment Share on other sites More sharing options...
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