57 speedometer
Thread Starter
Racer
Joined: Jan 2007
Posts: 383
Likes: 33
57 speedometer
My speedometer needle has been acting erratic, I replaced the cable, it did not help,I have taken the speedo out before and know it is not difficult, question is what is making the needle jump all over the place, 0 then 140 ,then o, never does show the correct speed, is there something in there I can fix or replace or does it have to go out for repair. strangely the odometer works. thanks Mike
Safety Car
Joined: May 2005
Posts: 3,921
Likes: 46
From: So Cal
Thats what my 54 speedo did right before it quit for good. It's not a bad repair. If your case is in good shape try a local speedo shop, you'll be surprised how quickly and inexpensively they are rebuilt if parts don't need to be rechromed.
Racer
Joined: Apr 2008
Posts: 352
Likes: 0
Thread Starter
Racer
Joined: Jan 2007
Posts: 383
Likes: 33
Thanks 1954 corvair for the reply and help, I have the speedo in front of me out of the housing, I see that the needle is attached sodered I guess to a small disc, when I move the needle the disc moves but there is small bump on the disc that hits a stop on the housing at about 60 mph mark on the dial. I do not want to remove the housing, looks like two screws until I talk to you, speedo shop wants $130.00 to fix it, please email or call me mikbly@msn.com or 206-909-6180 Seattle, thanks Mike
Cruising
Joined: Jul 2009
Posts: 11
Likes: 0
I believe the cable
from the drivetrain spins a magnet in the speedometer. There is no direct connection, no gears. The spinning magnet induces a field which causes a plate attached to the needle to move. The needle's movement is restricted by a coil spring, resulting in an accurate reading. (If I'm wrong, please forgive me, I gained this knowledge repairing the speedometer on a '62 Buick LeSabre when it wasn't very old. For some reason, 'can't remember why, the magnet was actually contacting the plate, causing a whole lot more needle movement, all the way to 120 where it hit the peg and bounced back to zero.)
But the needle on my '57 fell right off and, as my mini-soldering skills are non-existent, I shipped it off to Bob's Speedometer (I liked the name) and Bob fixed it beautifully.
But the needle on my '57 fell right off and, as my mini-soldering skills are non-existent, I shipped it off to Bob's Speedometer (I liked the name) and Bob fixed it beautifully.
Racer
Joined: Apr 2008
Posts: 352
Likes: 0
Thanks 1954 corvair for the reply and help, I have the speedo in front of me out of the housing, I see that the needle is attached sodered I guess to a small disc, when I move the needle the disc moves but there is small bump on the disc that hits a stop on the housing at about 60 mph mark on the dial. I do not want to remove the housing, looks like two screws until I talk to you, speedo shop wants $130.00 to fix it, please email or call me mikbly@msn.com or 206-909-6180 Seattle, thanks Mike
I'll give you a call to help you today.
Racer
Joined: Apr 2008
Posts: 352
Likes: 0
from the drivetrain spins a magnet in the speedometer. There is no direct connection, no gears. The spinning magnet induces a field which causes a plate attached to the needle to move. The needle's movement is restricted by a coil spring, resulting in an accurate reading. (If I'm wrong, please forgive me, I gained this knowledge repairing the speedometer on a '62 Buick LeSabre when it wasn't very old. For some reason, 'can't remember why, the magnet was actually contacting the plate, causing a whole lot more needle movement, all the way to 120 where it hit the peg and bounced back to zero.)
But the needle on my '57 fell right off and, as my mini-soldering skills are non-existent, I shipped it off to Bob's Speedometer (I liked the name) and Bob fixed it beautifully.
But the needle on my '57 fell right off and, as my mini-soldering skills are non-existent, I shipped it off to Bob's Speedometer (I liked the name) and Bob fixed it beautifully.
