Re: IML: 62 Speedometer off by 10 mph

[sosmi@xxxxxxxxxxx]

Graham, it would seem a significant reduction in tire diameter, would be necessary to be 10 mph off at 70 mph. thats assuming it was correct before tire replacement.I would check actual gear ratio, then compare tire diameters, from original and the present.The FSM has a chart in the trans section, that gives specs for speedo pinions according to gear ratio, and tire size.Ya'll have a nice day, Dave.

 

> -------------- Original message -------------- 
> From: "Graham Quimby" <ghquimby@xxxxxxx> 
>
> > Fellow Imperialists, 
> > 
> > The speedometer on my 62 Crown seems to be off by 10 mph at all speeds 
> > (except 0). I have tested it at highway speeds (between 50 to 70 mph) 
> > and it is consistently 10 mph faster than the actual speed Iâ??m 
> > traveling. The transmission and real axle are original. I have 
> > P235/75R15 radials. Iâ??ve heard that a different tooth speedometer pinion 
> > may fix the problem since I have radial tires. I wanted to double check 
> > with the experts on the list what size pinion I should order. 
> > 
> > Thanks, 
> > Graham Quimby 
> > 1962 Caramel Crown 2 door Hardtop 
> > 
> > 
> > 
> > 
> > ----------------- http://www.imperialclub.com ----------------- 
> > This message was
>  sent to you by the Imperial Mailing List. Please 
> > reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be 
> > shared with everyone. Private messages (and attachments) for the 
> > Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx 
> > To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm 
> >