Ozz 7 #1 Posted May 16, 2024 Hi guys and gals, new guy here. I just bought a 1985 312-8 that is missing the knob on the shifter. I would like to install a knob but do not know the thread pitch. Any help would be much appreciated. Share this post Link to post Share on other sites
Pullstart 64,471 #2 Posted May 16, 2024 I BELIEVE it is just a standard 5/16” course thread. I just stuck a knob on one of my tractors a couple days ago. It is standard and 3/8”-16 was too big. Share this post Link to post Share on other sites
ebinmaine 70,674 #3 Posted May 16, 2024 If you don't already have the answer by then I can check later today. I have a transmission from a 312 below my bench. Share this post Link to post Share on other sites
Ed Kennell 40,455 #4 Posted May 16, 2024 5/16-18 UNC 2 Share this post Link to post Share on other sites
Ozz 7 #5 Posted May 16, 2024 Thanks to all who replied. The thread turned out to 3/8 16. 1 Share this post Link to post Share on other sites
ebinmaine 70,674 #6 Posted May 16, 2024 2 minutes ago, Ozz said: Thanks to all who replied. The thread turned out to 3/8 16. Whatcha gettin' for a shift knob? Share this post Link to post Share on other sites
Ozz 7 #7 Posted May 16, 2024 15 minutes ago, ebinmaine said: Whatcha gettin' for a shift knob? Search for "Female Tapered Knob - 1 5/8 Dia., 3/8-16 Thread Oval/Tapered Plastic Phenolic Knob Brass Insert. Black Plastic Knob with Threaded Insert" in amazon, scroll down and you will see some that should work. Only $4 by the way. 2 Share this post Link to post Share on other sites
Ed Kennell 40,455 #8 Posted May 16, 2024 1 hour ago, Ozz said: The thread turned out to 3/8 16. Interesting, My 310-8 is 5/16-18 on the Hi /Low shifter. I couldn't get the 1-3 shifter knob off. So, now I am wondering if all H/Ls are 5/16 and all 1-3s are 3/8 ??? Anyone have them both off? 1 Share this post Link to post Share on other sites
WHX?? 50,698 #10 Posted May 17, 2024 Here's what you need... 2 Share this post Link to post Share on other sites
ebinmaine 70,674 #11 Posted May 17, 2024 3 minutes ago, WHX?? said: Here's what you need... Bulldogs are cool too. 2 1 Share this post Link to post Share on other sites
Pullstart 64,471 #12 Posted May 17, 2024 Yeah, custom is always an option… 2 2 Share this post Link to post Share on other sites
87 416-8 horse 423 #13 Posted May 17, 2024 Also if you have the time and tools you can make one yourself. I’m thinking about turning a metal one on the lathe. 3 Share this post Link to post Share on other sites
Ozz 7 #14 Posted May 18, 2024 The new knob came in, here is a pic. 4 Share this post Link to post Share on other sites
