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| | | | Joined: May 2023 Posts: 443 'Bolter | | 'Bolter Joined: May 2023 Posts: 443 | Put in a new speedometer cable and its not working. I have a new speedometer in the dash so I’m guessing it is a problem on the trans side. I’m working on getting the trans out now and wanted to ask what’s involved in taking the speedometer fitting out of the trans and replacing it with a new one after I get the trans on the bench.
Doug
1954 Chevy 3100One problem solved doesn’t seem to shorten the list Montgomery, ALIn Project Journals | | | | | Joined: May 2015 Posts: 10,997 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 10,997 | The speedo adapter on the trans just screws out. Assuming you're talking about a 3-speed tranny, the speedo gear in the tranny slips on the shaft, followed by a sleeve and then the u-joint yoke, held on by a bolt that prevents the gear from slipping on the shaft.
I have my doubts that the problem is in the tranny. You can check to see if the adapter is working once the driveshaft u-joint is disconnected from the torque tube. Put the tranny in neutral and turn the u-joint and watch for motion at the speedo adapter.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Mar 2004 Posts: 6,212 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,212 | You can also check the speedometer with a variable speed drill connected to the cable...don't go wide open with the drill until you confirm it's turning in the right direction. You could have a bad speedometer right out of the box, I went through 3 that never made it to 1000 miles. Mike B  | | | | | Joined: Mar 2014 Posts: 4,477 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,477 | Doug if you kept your old speedometer and if the new one isn't working (which won't be that uncommon) let me know. I've repaired several of them...not the new ones. The old ones are worth repairing but the new ones...not so much.
Good luck!
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
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