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MGB Proper MGB Overdrive speedometer

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bluemg

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I recently changed to a overdrive transmission from a 72 MGB.
The 1040 speedometer that was dead on accurate is now 12 mph off. Which speedometer do I need to find to work with the overdrive? is it a 1450 ???
Thanks
 
Mickey Richaud

Mickey Richaud

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Here's a chart that should help:
 

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drooartz

drooartz

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My speedo is a 1280 -- this is on a Nov 1970 built car with factory black label overdrive. Of course the speedometer doesn't work, so can't vouch for its accuracy...
grin.gif
 
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