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1964 4 spd speedometer gears #970127 04/09/11 10:37 PM 04/09/11 10:37 PM
Joined: Nov 2009 Posts: 1,281 WI W wannadrag OP pro stock
wannadrag OP pro stock W Joined: Nov 2009 Posts: 1,281 WI	1964 Belvedere with a original 64 type 4 spd,4.10 gears with a 28" tire.Speedometer is way off.What do i need to do to make the speedometer accurate? 6577331-MVC-059S.JPG (55 downloads)

Re: 1964 4 spd speedometer gears [Re: wannadrag] #970128 04/09/11 10:48 PM 04/09/11 10:48 PM
Joined: Jan 2003 Posts: 2,673 Northern MN 1E2C master
1E2C master Joined: Jan 2003 Posts: 2,673 Northern MN	A miracle. Seriously, they didn't make a gear to go with that ratio, you need an adapter. I've heard Imperial Services makes one, but can't swear to it. Here's a chart of tire sizes vs rear ratio, this will let you calculate the adapter ratio. Mike 6577343-PinionChart.jpg (55 downloads)

Re: 1964 4 spd speedometer gears [Re: 1E2C] #970129 04/10/11 08:54 AM 04/10/11 08:54 AM
Joined: Sep 2006 Posts: 277 Palmyra, NY 6 63stabamatic enthusiast
63stabamatic enthusiast 6 Joined: Sep 2006 Posts: 277 Palmyra, NY	I couldn't find the right gear for my pushbutton 63 trans so ended up with a GPS heads up speedometer that puts the speed on the windshield. It was half the price of the gear adapter which would only be good for that tire and gear. Jim

Re: 1964 4 spd speedometer gears [Re: 1E2C] #970130 04/10/11 08:55 AM 04/10/11 08:55 AM
Joined: Jan 2003 Posts: 21,065 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,065 Niles , Ohio	Steve at Imperial Services makes an adapter that changes the ratio.They are pricey.When I had the 4.88s in my 65 the speedo would show 80 in first.I have 3,91s now and know that the speedo is off by about 20 %.I just go by that.Rocky Chrysler Firepower

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