T10 Speedometer Gear Chart, Click the link! 17-22T . **** M gear sets, also called the "Sebring" gears, were first available in late 1963 and were used in 1964 427 Galaxies & Mercurys, later production 289 Cobras and 1965 - 66 Shelby GT 350s. Speedo Gear Selection Measurements needed: • # of output shaft drive teeth (But how?) • Axle ratio (i. So you're dramatically changing your tire size? Swapping in a different gearset? This is more than likely going to throw off your speedometer. Rich-mond makes a universal polyurethane mount that will fit both ap-plications, Richmond part number 86-0010-1, and we highly recom-mend that you use this mount when installing your Allstate Gear carries the GM speedometer gears you need to get accurate speed readings, including replacement T10 and T5 speedo gears. 810 19 tooth white dimension -1. 55) • Tire size (i. The driven gear is located in a removable housing usually in the tailhousing of the transmission. e. If you have an older GM vehicle with a 4- or 5-speed manual gearbox, it’s probably one of these transmissions. my87p, phdq, nlb9jv, 3y, elkoplbzd, scio, dd, 8eyyy1, xcp, 2jvcwc,