Thanks for the input. I have a GPS that I can check some of this out with. The speedometer reads low which I guess sounds like a gear issue or a speedo repair. I will check the odometer and report back. Ed -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Dick Benjamin Sent: Saturday, March 19, 2005 11:19 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: RE: IML: Speedometer on '68 Your tires are lower in rolling diameter that the originals, but not enough to make a 10% difference. Also, this error would make the speedometer read high. Does yours read high or low? Also, and more important, have you checked the odometer for accuracy. If it is about right (typically they are a few percent high), then your problem has to be internal to the instrument. The common cause for JUST the speed indication to read low is a need for lubrication in the indicator pivot. That requires someone who knows speedometers to take fix. The oil is special, and it has to be applied very carefully. The common cause for just the speed indication to be too high is a weak hair spring - again, you need professional help with this. If both your odometer and your speedometer are off, and by about the same percentage, then the problem may indeed be in the drive gear at the rear of the transmission, or a wrong differential ratio. The way to check this is to note that the speedometer drive is designed such that the cable makes 1000 revolutions per mile (this is a USA standard for just about all cars). That means if you move your car while looking at the speedometer cable end, 10 revolutions should be very close to 52 feet 9 5/8 inches. Check that to verify how far off your gearing is. Dick Benjamin -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Ed Buitenwert Sent: Saturday, March 19, 2005 8:32 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: RE: IML: Speedometer on '68 The tires are radials (surprise to me) P235 75R15. Ed -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Elijah Scott Sent: Saturday, March 19, 2005 8:45 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: RE: IML: Speedometer on '68 --- Ed Buitenwert <mster-ed@xxxxxxxxxx> wrote: > Does anyone know that if my speedometer is off (it > works and the tripometer and odometer work) about > 10-15 mph, is it just a remove and lube issue or > some kind of gear issue in the speedometer itself > that needs to be sent off and repaired? What size tires do you have on the car? This can affect the speedometer reading. Elijah http://www.imperialclub.com/~imperial71/ http://www.imperialclub.com/~imperial71/bookshelf.htm 1965 Imperial LeBaron 1967 Chrysler Newport Custom Sedan 1970 Imperial LeBaron 1971 Imperial LeBaron __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail ----------------- 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 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.7.3 - Release Date: 3/15/2005 ----------------- 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 --- [This E-mail scanned for viruses by Declude Virus] --- [This E-mail scanned for viruses by Declude Virus] ----------------- 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 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.7.3 - Release Date: 3/15/2005 ----------------- 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