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Post by GTCGreg on Nov 14, 2017 13:22:20 GMT
Back when my dad still had owned his carpenter shop, he he often tried to fixed his delivery truck himself. When the speedometer had stopped working, he had replaced the speedo cable. He was very proud that it had worked until he had a boot full of gearbox oil. Turned out that the core is a spiral and when installed upside down, it pumps oil out of the gearbox into the dashboard. I'm calling this one out as fishy. if you have a coil, and turn it, it will "carry" in the same direction, no matter which way around you install it. now it may have had directional seals in it. TLW is correct. |
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Post by c64 on Nov 14, 2017 17:33:30 GMT
I'm calling this one out as fishy. if you have a coil, and turn it, it will "carry" in the same direction, no matter which way around you install it. now it may have had directional seals in it. TLW is correct. I have never given it much thought. Of course it schouldn't matter! I have looked the part up. They used the same part for the small delivery trucks as for mid sized tractors. And you can still buy it in spare part shops for vintage farming machinery.  looks like the treat is the same on both ends. But they are v ery different... |
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Post by the light works on Nov 14, 2017 17:53:55 GMT
I have never given it much thought. Of course it schouldn't matter! I have looked the part up. They used the same part for the small delivery trucks as for mid sized tractors. And you can still buy it in spare part shops for vintage farming machinery. looks like the treat is the same on both ends. But they are v ery different... it may be there was a bad seal in the transmission and it pumped the oil up the cable. |
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Post by GTCGreg on Nov 14, 2017 17:54:14 GMT
I have never given it much thought. Of course it schouldn't matter! I have looked the part up. They used the same part for the small delivery trucks as for mid sized tractors. And you can still buy it in spare part shops for vintage farming machinery. looks like the treat is the same on both ends. But they are v ery different... As TLW said, the seal may be different on the two ends and that could make a difference, but you originally said, The fact is, which end of the spiral is inserted into the transmission would have nothing to do with oil being drawn out of the transmission. Maybe which end of the entire assembly is connected to the transmission could, but it wouldn't be because of the spiral core. |
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Post by the light works on Nov 14, 2017 18:00:02 GMT
I have never given it much thought. Of course it schouldn't matter! I have looked the part up. They used the same part for the small delivery trucks as for mid sized tractors. And you can still buy it in spare part shops for vintage farming machinery. looks like the treat is the same on both ends. But they are v ery different... As TLW said, the seal may be different on the two ends and that could make a difference, but you originally said, The fact is, which end of the spiral is inserted into the transmission would have nothing to do with oil being drawn out of the transmission. this would be a quick demonstration for TXteacher. he would just need a piece of running thread (allthread) and a nut. |
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Post by GTCGreg on Nov 14, 2017 18:07:28 GMT
The two times I ever replaced a speedometer cable, it looked like this. There was no way to reverse the ends.  |
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Post by the light works on Nov 14, 2017 18:21:44 GMT
The two times I ever replaced a speedometer cable, it looked like this. There was no way to reverse the ends. I think the ones the Jeep takes have different sized ferrules on each end. but they are pretty much like the one C64 posted. |
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Post by GTCGreg on Nov 14, 2017 19:25:33 GMT
The strangest speedometer setup I ever saw was on a 1993 Chevy Corvair. The cable wasn't connected to the transmission but came through the driver's side front wheel axle and the inner spiral part went through a small square hole in the hub cap.  |
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Post by the light works on Nov 14, 2017 19:56:02 GMT
well, shorter cable, I guess, but I would think they could have put a fitting on the back of the hub.
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Post by GTCGreg on Nov 14, 2017 20:09:04 GMT
well, shorter cable, I guess, but I would think they could have put a fitting on the back of the hub. The other problem with using the front wheel to connect the speedometer is the speedometer cable got bent every time you turned the steering wheel. There were a lot of things on the Corvair that they could (and should) have done differently. The fan belt comes to mind.  |
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Post by the light works on Nov 14, 2017 20:13:31 GMT
well, shorter cable, I guess, but I would think they could have put a fitting on the back of the hub. The other problem with using the front wheel to connect the speedometer is the speedometer cable got bent every time you turned the steering wheel. There were a lot of things on the Corvair that they could (and should) have done differently. The fan belt comes to mind. and they only got a few fixed, because Nader made it his personal mission to destroy the model. |
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Post by GTCGreg on Nov 14, 2017 20:33:17 GMT
I was never a big fan of Nader, but the Corvair really was a POS automobile. The fact that the rear wheels would buckle under going around curves and the car would flip over didn't help.
The strange thing is I have some friends in Wisconsin (think Red/Green show) that believe the Corvair was the greatest thing ever made and actually collect them.
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Post by the light works on Nov 15, 2017 2:54:43 GMT
I was never a big fan of Nader, but the Corvair really was a POS automobile. The fact that the rear wheels would buckle under going around curves and the car would flip over didn't help. The strange thing is I have some friends in Wisconsin (think Red/Green show) that believe the Corvair was the greatest thing ever made and actually collect them. they fixed that problem in the second model year. my dad liked corvair engines. his friends would flip the ring gear in a volkswagen transaxle and bolt up a corvair engine to it for their dune buggies. I understand he was a better than average (sand dune) hillclimber before us kids came along. the last buggy he had was a front engine V-8, though. |
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Post by GTCGreg on Nov 15, 2017 3:50:05 GMT
I was never a big fan of Nader, but the Corvair really was a POS automobile. The fact that the rear wheels would buckle under going around curves and the car would flip over didn't help. The strange thing is I have some friends in Wisconsin (think Red/Green show) that believe the Corvair was the greatest thing ever made and actually collect them. they fixed that problem in the second model year. my dad liked corvair engines. his friends would flip the ring gear in a volkswagen transaxle and bolt up a corvair engine to it for their dune buggies. I understand he was a better than average (sand dune) hillclimber before us kids came along. the last buggy he had was a front engine V-8, though. Both the VW beetle and the Corvair had similar engines directly attached to the transaxle transmission. This made them both ideal for dune buggies. I don't know the horsepower ratings but the VW engine was an opposed 4 cylinder and the Corvair an opposed 6. Because of the design of the air blower, the Corvair engine was a little more compact. In fact, when my VW hippy bus broke in half due to rust, I gave the engine and transaxle to a guy that use it to build a trike motorcycle. I think my fondness for the Corvair stems from the fact that my best friend in high school had one and I spent way too much time in his garage trying to help him keep it running. |
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Post by silverdragon on Nov 15, 2017 8:01:45 GMT
Just a moment whilst I scrape the fog away... going back some 30 yrs to replacing a speedo cable on a mini or a bike, cant remember which... but following advice from the spares guy....
Cant also remember if it was originally the speedo or the rev counter, but same advice would stand for both.
I was warned that I "HAD" to put the cable on the right way up.
There is indeed a pressure seal on the lower end, the one you put on the gearbox, to prevent oil being pressured up the cable from the gearbox, being the gearbox is positively pressured, the top end has no seal at all, and you are supposed to put some oil in it to grease the inside of the cable, but, only a few drops.
If you have no seal, the cable would just be a breather pipe for the oil in the gearbox.?..
And again, this is me being a backyard mechanic that can do older stuff, just not the new stuff.
However, I was able to discount a "Myth" that if you installed it "Backwards" you could get your speedo to run in reverse and un-clock the mileage clock.... clockwise is clockwise no matter which end you feed in from the cable.
You could however do that by running it in reverse with a drill on the lower end.
Before that is they outlawed any clock that works that way?.. newer mechanical clocks have a one-way only clock that wont go backwards if you reverse the car.
Mine is electronic display, try fiddling with that unless you know coding?.
I do miss the ability to "tinker" under the bonnet of a vehicle.
Being able to do your own servicing, you scheduled things "as needed", in that you didnt change the oil at so many thousand miles, you did it as soon as the old oil looked like it needed new.
If you drive a car hard, it need more oil changes. No matter what mileage.
Changing air filters, spark plugs, topping up anti-freeze, brake fluid, clutch, you were that intimate with the car, you know when its going to need that attention, and schedule it before it gets desperate.
Now?.. we just rely on an electric nanny on the dash board.
And I think I am the only one in the street who knows what pressure my tyres are at, and indeed what they should be at, without having to find the sticker inside the passenger door that tells you that.
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Post by the light works on Nov 15, 2017 15:21:50 GMT
Just a moment whilst I scrape the fog away... going back some 30 yrs to replacing a speedo cable on a mini or a bike, cant remember which... but following advice from the spares guy.... Cant also remember if it was originally the speedo or the rev counter, but same advice would stand for both. I was warned that I "HAD" to put the cable on the right way up. There is indeed a pressure seal on the lower end, the one you put on the gearbox, to prevent oil being pressured up the cable from the gearbox, being the gearbox is positively pressured, the top end has no seal at all, and you are supposed to put some oil in it to grease the inside of the cable, but, only a few drops. If you have no seal, the cable would just be a breather pipe for the oil in the gearbox.?.. And again, this is me being a backyard mechanic that can do older stuff, just not the new stuff. However, I was able to discount a "Myth" that if you installed it "Backwards" you could get your speedo to run in reverse and un-clock the mileage clock.... clockwise is clockwise no matter which end you feed in from the cable. You could however do that by running it in reverse with a drill on the lower end. Before that is they outlawed any clock that works that way?.. newer mechanical clocks have a one-way only clock that wont go backwards if you reverse the car. Mine is electronic display, try fiddling with that unless you know coding?. I do miss the ability to "tinker" under the bonnet of a vehicle. Being able to do your own servicing, you scheduled things "as needed", in that you didnt change the oil at so many thousand miles, you did it as soon as the old oil looked like it needed new. If you drive a car hard, it need more oil changes. No matter what mileage. Changing air filters, spark plugs, topping up anti-freeze, brake fluid, clutch, you were that intimate with the car, you know when its going to need that attention, and schedule it before it gets desperate. Now?.. we just rely on an electric nanny on the dash board. And I think I am the only one in the street who knows what pressure my tyres are at, and indeed what they should be at, without having to find the sticker inside the passenger door that tells you that. my tires run at 80 PSI. and they weigh twice as much as the big chain passes off as truck tires. and cost almost three times as much, but they last for three years instead of .9 years. |
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Post by GTCGreg on Nov 15, 2017 15:26:14 GMT
35 on the Jeeps, 55 on my wife's Excursion and 32 on the Astro.
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Post by the light works on Nov 15, 2017 15:32:41 GMT
35 on the Jeeps, 55 on my wife's Excursion and 32 on the Astro. 100 on the fire engines, and they gave us a gauge that goes to 40. |
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Post by GTCGreg on Nov 15, 2017 16:03:13 GMT
35 on the Jeeps, 55 on my wife's Excursion and 32 on the Astro. 100 on the fire engines, and they gave us a gauge that goes to 40. So the needle goes around two and a half times? |
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Post by the light works on Nov 15, 2017 17:24:53 GMT
100 on the fire engines, and they gave us a gauge that goes to 40. So the needle goes around two and a half times? it's a stick gauge.  I suppose I could measure how far the stick embeds in the wall... instead I just use this model of gauge.  |
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