Hi everyone. I put in a "J" Type overdrive in my 76 TR6 and I now note
about a 15 percent error in the speedometer. I now realize that the
speedometers for early and late, late models were different and had
different gearing. I also went to 205-70 15 tires but that would only
be a 1 percent error. What do I change, driving gear, driven gear or
get an earlier speedometer. Speedometer seems like the easiest, but how
difficult is it to change the other 2 items. I really like the
overdrive, seems like the engine noise just disappears when engaged.
Thanks in advance for any help. John Mitchell 76TR6 BRG
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