The Ford Barn - View Single Post - Ruckstell axle...underdrive or overdrive?

Dan McEachern · 01-03-2024, 04:04 PM

Ford never made a 13/39 gear set. These were made and sold by Mark Auto for many years. The Ruckstell company made a special 13/40 gear set for use in their rear ends. The 13/40 tooth Ruckstell ring gear is recessed on the mounting surface. This ring gear and the Ford 40 tooth ring gear are not interchangeable.

01-03-2024, 04:04 PM	#13
Dan McEachern Senior Member Join Date: Aug 2010 Location: SF Bay Area Posts: 254	Re: Ruckstell axle...underdrive or overdrive? Ford never made a 13/39 gear set. These were made and sold by Mark Auto for many years. The Ruckstell company made a special 13/40 gear set for use in their rear ends. The 13/40 tooth Ruckstell ring gear is recessed on the mounting surface. This ring gear and the Ford 40 tooth ring gear are not interchangeable.