johnj92131 Posted February 2, 2014 Share Posted February 2, 2014 I am putting a new spedometer in my 91 Comanche and want to match the old Odometer reading to the new odometer reading. This is the electronic spedometer and it is not the same as the 90 and before odometer. Remember seeing a post on here about how to change the later odometer readings. But search is not working for me right now. All I get is a message that there is a problem communicating with the database. Hornbrod, think you also have seen the post. Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 2, 2014 Share Posted February 2, 2014 When I was calibrating Jeep cluster gauges a few years ago, I tried several times to reset the 91 and up odometers and was never able to due to the tamper-proof cage surrounding them. I've never seen a writeup here or anywhere else on anyone doing this successfully except for speedo shops. It's doable but I wasn't smart enough to figure it out. http://comancheclub.com/topic/12849-changing-odometer/?hl=odometer&do=findComment&comment=126922 Link to comment Share on other sites More sharing options...
JeepcoMJ Posted February 2, 2014 Share Posted February 2, 2014 Remove the speedo from old cluster and put into new cluster. Won't upgrade to trip, but will be correct Link to comment Share on other sites More sharing options...
91Pioneer Posted February 2, 2014 Share Posted February 2, 2014 This is what you need to know --> http://www.naxja.org/forum/showthread.php?t=921205&page=2#24 Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 2, 2014 Share Posted February 2, 2014 This is what you need to know --> http://www.naxja.org/forum/showthread.php?t=921205&page=2#24 Bookmarked. Thanks. :cheers: Link to comment Share on other sites More sharing options...
johnj92131 Posted February 2, 2014 Author Share Posted February 2, 2014 Don, that was the post I was looking for. Went all thru the DIY forum a couple of times. Dainternetguy - Many thanks for posting that great link. Bookmarked both links. Link to comment Share on other sites More sharing options...
ggcnash Posted February 3, 2014 Share Posted February 3, 2014 I've done many not hard just when you do get the odometer free spinning use drill not dremel its to fast will mess up gears! Do not try to remove odometer just Mitsubishi gear box to make the odometer free spinning then make a jig to position the odometer gear up against drill (I used some books and zip tie on trigger of drill LOL) takes awhile but I was able to roll back one from 290k to 150k in about 5.5 hours oh and guys the problem with removing odometer totally is that its tamper proof so when you do this the numbers will not line up so to avoid this just remove gearbox and use drill Link to comment Share on other sites More sharing options...
dinghyboy Posted February 4, 2014 Share Posted February 4, 2014 I'm getting ready to put in a full gauge cluster in my 1992 but need to roll the new odometer forward, as in increase the miles. I wonder if there is a way to do this electronically. Is there any way to determine what voltage needs to be fed to the gauge cluster and how it should be fed to make the odometer increase milage. Thanks for any suggestions. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted February 4, 2014 Share Posted February 4, 2014 Install it, remove sender from tcase, take gear off shaft from spare speedo gear, hook drill up, walk away and monitor. Key on of course Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 4, 2014 Share Posted February 4, 2014 The only way I know would be to use a function generator simulating the frequency and amplitude of the square wave generated by the speed sensor. Would be tough to do for the average tech. There may be other methods, but I don't know of any. Link to comment Share on other sites More sharing options...
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