Re: 1935 1200 speedo gears

Posted by HH56 On 2022/7/8 12:18:08

If there was a factory option for the new axle ratio you might be able to find the proper Packard cable pinion gear from one of the vendors. I believe the number of pinion teeth needed for an axle ratio is listed in the parts manual.

If nothing is available you will probably need to have a conversion box custom made at one of the speedo shops. Do a search for speedometer ratio conversion box and several sites will come up that offer various options including some where they will put together a gear train with different teeth in the set of gears to get a proper speed change and keep the correct cable rotation direction. I don't know if the threaded nut Packard used in 35 at the cable ends will be the same as anything modern but since the conversion box will go inline in the cable that might be a sticking point..

One of the sites that came up was Bob's Speedometer which I believe is the company owned by one of our frequent posters. If it is he is a Packard owner and should be able to give you a definitive answer as to what is available.