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View Full Version : 1948 M5 Speedometer hookup



samson009
02-16-2006, 08:42 PM
My recently purchased M5 has a 4.3 GM engine with automatic transmission.

Is it possible to hook up the origional spedometer to the automatic transmission?

Any information greatly appreciated.

Thank you.



jan
1948 M5
1951 Champion Starlite Coupe
1956 Powerhawk

Dick Steinkamp
02-16-2006, 09:25 PM
quote:Originally posted by samson009


My recently purchased M5 has a 4.3 GM engine with automatic transmission.

Is it possible to hook up the origional spedometer to the automatic transmission?

Any information greatly appreciated.

Thank you.



jan
1948 M5
1951 Champion Starlite Coupe
1956 Powerhawk


No problem. Just have a speedometer shop make up a cable with connections for your speedometer on one end and the GM trany on the other (you'll probably have to bring them your speedometer). Should be less than $30. Then start playing with speedometer driven gears to find the one that makes things accurate. You can compute a starting point using something like this...

http://www.bgsoflex.com/speedo1.html

...but will probably have to dial it in using trial and error. The good part is the GM driven gears are cheap and easily found at any GM dealer.

-Dick-