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Old Jan 10, 2013 | 08:37 PM
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just bought 66 coupe,327,300hp,all original,tires on knock off wheels. I drove it for 2nd time and noticed speedometer is way off---shows slower than I am going,65mph,tach is at 2500 rpm. Whats the problem and how do i repair ?
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Old Jan 10, 2013 | 08:41 PM
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the plastic speedo gear in the trans is wrong. you have to determine what rear gear you have. after you do that. post that here and some one will steer you to the right part.

its a 30 min job at best that anyone could do
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Old Jan 10, 2013 | 08:42 PM
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Originally Posted by crovt
just bought 66 coupe,327,300hp,all original,tires on knock off wheels. I drove it for 2nd time and noticed speedometer is way off---shows slower than I am going,65mph,tach is at 2500 rpm. Whats the problem and how do i repair ?
Most likely has a mis-matched speedo driven gear for the installed axle ratio (PO probably changed the axle and didn't bother to change the speedo gear). What's the axle ratio, and what speedo gear is in it now?
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Old Jan 10, 2013 | 08:51 PM
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thanks,you guys are great!
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