G GNRick Retired member Joined Mar 21, 2004 Sep 24, 2013 #21 I have gnx size tires...255X50X16. Should that throw my speedo off by 20 mph? Should I contact VDO and see what they say? My transmission has the stock speedometer gears (11 tooth orange and 30 tooth blue). Rear axle is 3.42. Thanks.
I have gnx size tires...255X50X16. Should that throw my speedo off by 20 mph? Should I contact VDO and see what they say? My transmission has the stock speedometer gears (11 tooth orange and 30 tooth blue). Rear axle is 3.42. Thanks.
G GNRick Retired member Joined Mar 21, 2004 Sep 25, 2013 #22 Anybody try the Art Carr Speedo Correction Adaptor? http://www.cpttransmission.com/#
S SSedan64 JoaTMoN Joined Dec 8, 2007 Sep 25, 2013 #23 Should work fine, Ratio Adapters were used by the Factory years ago, 70 Chevelle etc.. A little cheaper here: http://www.transmissioncenter.net/speedometer_calibration_______va.htm#gm ratio adapter Or click on link here, if link above doesn't work: http://www.transmissioncenter.net/speedometer_calibration_______va.htm#gm
Should work fine, Ratio Adapters were used by the Factory years ago, 70 Chevelle etc.. A little cheaper here: http://www.transmissioncenter.net/speedometer_calibration_______va.htm#gm ratio adapter Or click on link here, if link above doesn't work: http://www.transmissioncenter.net/speedometer_calibration_______va.htm#gm
G GNRick Retired member Joined Mar 21, 2004 Sep 25, 2013 #24 Thanks SSedan64. I saw that website but somehow missed the ratio adaptors. I think that is where my transmission guy buys his parts from.
Thanks SSedan64. I saw that website but somehow missed the ratio adaptors. I think that is where my transmission guy buys his parts from.
