John Deere farm tractors built in the 1970s and 1980s were built with a rear remote quick coupler style that isn't used anymore with farm implements. Today, most implements use the ISO standard Pioneer style quick couplers. To identify the style of rear remotes you have on your John Deere tractor, take a look inside the rear remote coupler on the back of your tractor. There will be a curved piece of metal in the shape of a crescent moon at the way back of the rear remote if you have the John Deere old style (some call it a cone style), and the inner sides of the coupler will slope inward slightly, like a cone. Be aware that some tractors that were originally built with the old style rear remotes have since been permanently converted over to the Pioneer style using John Deere rear remote converter kit part number RE206778. If there is a ball instead of the crescent moon shaped piece of metal in the back of the rear remote, then your tractor has the Pioneer style rear remotes. The tractor part explained in this video replaces John Deere part number AR98201. The Pioneer part number is 4060-4.

Purchase adapter here:
https://www.shortlineparts.com/old-st...

These are the John Deere tractor models that were originally manufactured with the old style (cone style) rear remote quick connect: 1010, 1020, 1520, 1530, 2010, 2020, 2030, 2040, 2150, 2255, 2355N, 2155, 2240, 2550, 2350, 2555, 2355, 2440, 2510, 2520, 2630, 2640, 2750, 2855N, 2755, 2840, 2940, 2950, 2955, 3010, 3020, 3055, 3255, 3150, 3155, 4000, 4020, 4010, 4030, 4240, 4440, 4040, 4250, 4450, 4050, 4255, 4455, 4055, 4230, 4320, 4430, 4520, 4955, 4755, 4555, 4760, 4960, 4560, 4620, 4630, 4840, 4640, 4840, 4850, 4650, 5010, 5020, 6030, 7020. This is not an exhaustive list, but covers the tractors that most commonly need the JD Old Style to Pioneer quick couple adapter.