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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 11-05-2009   #1 (permalink)
reeseb66 is offline Rookie

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Default 1966 Mustang speedometer cable problems

Hi. I two problems. I was replacing some dash lights so I disconnected the speedometer cable to pull the dash out and when I went to reconnect the cable by screwing back on the nut at the end of the cable I couldn't get close enough to the threads to screw it on. I appears like the round end on the cable needs to be pressed into the receptical one the dash in order to allow the nut to come close enough to screw it in. Is this correct or do you only have feed the cable into the hole and make sure it goes in all the way? Well, the next thing I tried was pulling the cable out of the cable sheath and now the last 12 inches of the cable won't go back in the sheath. Is this normal? Do I now have to disconnec the sheath at the transmission in order put it all back together? And even if I did that what do I do about not being able to get the nut close enough to the threads? Please help. I appreciate it!
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Unread 11-06-2009   #2 (permalink)
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Sounds like you will have to unhook from the tranny and make sure the plastic gear isn't broken. It is attached to the cable with a clip. On the other end, it should just line up with the speedo with only a little persuasion and then screw on the retaining nut.
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Unread 11-07-2009   #3 (permalink)
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Default Yeah, it's a bear

You will have to disconnect the speedometer cable at the trans to see what's going on in there.

Hooking the cable back up to the dash is a real bear if you have big meathooks to work with like I do. There doesn't seem to be enough slack in the cable either, but there is just enough. You do have to get that nut threaded on however. In my 64 Fairlane, I had to remove my 4 speed shifter, lay on my back with my feet out the passenger door and reach up with my left hand to get it done. That car luckily has bench seats so if your car has a console and bucket seats it is probably worse. It can be done though.
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Unread 11-07-2009   #4 (permalink)
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Hello. That's odd. I've never had any trouble getting my hand in there to unhook the speedo cable. But, yes, if you can spin the speedo end of the cable, then, something is seriously wrong with the assembly. Either the inner cable has gotten snapped somehow or, the speedo gear on the transmission end of the cable has figured out a way to turn loose of the cable. Either way, you'll need to remove the cable from the transmission and see what the deal is, like Joe Bean said.
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Unread 11-07-2009   #5 (permalink)
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The UNhooking part was easy!
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Unread 11-21-2009   #6 (permalink)
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Default Speedometer not working in a 66 Mustang Fastback

Heard a noise underneath the car and now the speedometer is not working. Need detailed instructions on how to repair. Thanks
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Unread 11-21-2009   #7 (permalink)
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Unhook the cable from the tranny. Have someone in the car watching the speedo while another turns the end of the cable from under the car. if the speedo works, then your problem is at the tranny. Check the plastic gear that should be attached to the end of the cable and make sure there are no teeth broken.
If the speedo does not work, than the cable could be broken. Pull the cable out from the sheath and check to make sure it has the little flattened end on it that inserts into the speedo. If that is not on the end, the cable is broken and you will have to replace.
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