| 40merc | -- 06-19-2010 @ 8:20 PM |
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i started driving the 40 merc. and the speedo whines, anyone know a way to grease the gears in the cluster? and im also wondering if its possible to synchronize 1st gear in the old trannys? ive gota 47 flathead with matching tranny. thanks. Joe N.
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| 37RAGTOPMAN | -- 06-20-2010 @ 8:16 AM |
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you could try using a light oil and graphite powder mixture and feeding into the cable end that attaches to the back of speedometer hoping some will work itself in the speedometer solving your problem, the whine could be coming from the dry cable, using grease may hardern up and cause more problems in time, it should be pretty easy to acccess the back of speedometer,maybe a few applications may work,if not the first time, KEEP ON TRUCKIN 37RAGTOPMAN
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| 40merc | -- 06-20-2010 @ 9:13 AM |
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it could be the cable. however it is new (within the past 8 years), but i could swear its coming from the speedo its self. a year or so ago i took the cluster apart to repaint the needles but i do not recall anyway to lube it.
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| supereal | -- 06-20-2010 @ 2:52 PM |
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This type of noise often comes from the place where the cable sheath connects to the speedometer head. The speedometer, in most cases, doesn't have an actual bushing or bearing, but relies on the pot metal body of the unit to hold and align the inner cable.. When that area wears, it can allow the magnetic disks to rub each other. Speedometer heads are expensive, and should be sent to an expert. We use Bob's Speedometer in Michigan. I bought a NOS speedo a couple of years ago for my '47. $900.
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| TomO | -- 06-21-2010 @ 7:18 AM |
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On the 40 Mercury speedometer, there is a small cap covering an oil wick on the top of the housing. The speedometer has to be removed to access the cap. This wick only lubes the driven magnet shaft and that is an unlikely source for your noise. I suspect that your noise is coming from the cable end rubbing on the housing as Supereal stated in his post. I don't know of any way to add synchronize first gear in the stock transmission. If you really feel that it is necessary, you would have to buy adapters to adapt a modern transmission with first gear synchros to your engine and torque tube. Tom
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| 40merc | -- 06-21-2010 @ 9:39 AM |
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thanks for the info tom, ill have to go out and pull it again and look for the wick will like 3 in 1 oil work or does it require a specific type of oil? as for the tranny , the thought had just crossed my mind, ive never heard of it before and was just curious.
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| supereal | -- 06-21-2010 @ 10:32 AM |
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I don't know of any manual transmissions that sync first gear, either, unless it is an exotic foreign gearbox. Most of us shift into either second or high gear before going into first if the car has been running in neutral. That stops the cluster so you can drop into low gear. A clutch that needs "free play" adjustment can make getting in first gear a problem, too.
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| 37RAGTOPMAN | -- 06-21-2010 @ 1:30 PM |
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I think in 1967 FORD started to install syncros for time in 1 st gear, it would take a lot of work and money to convert this over and when done would not be original any more,if you drive the car you will get used to driving , that's what owning a old car is all about, KEEP ON TRUCKIN 37 RAGTOPMAN
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| TomO | -- 06-22-2010 @ 4:52 PM |
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40merc, any light oil. I used 10w oil when I did mine. I doubt that it will fix your problem, I oiled mine just to reduce wear. Tom
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| Stroker | -- 06-23-2010 @ 3:50 PM |
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In response to the idea of having a synchro low gear, I think you need to study the gear layout of the transmission. Gears that are in constant mesh with each other can,(and have been), synchronized by the original designers. In the case of our early Ford (and most other contemporary designs), only the second and high gears were in "constant mesh". In your transmission, the design had a low-reverse "slider" that moved on a splined shaft to pick-up the reverse gear idler in the reverse-gear position, and the moved along that splined shaft to pick up low gear. The layout is similar to the "crash-box" four-speed truck transmissions that I learned to double-clutch in the early fifties. Pursuing this "fantasy" that we all have had at one point or another in life would be very expensive. If you really want to have a synchro low, the most practicable approach would be to acquire an adapter to fit a GM 4-speed to your flatmotor, and install a Warner T-10, or T-5, T-6 or other contemporary full-synchro 4-6 speed. One option is to learn to "double-clutch". You can stuff an early Ford/Merc trans in low while rolling if you put it in neutral, rev the engine up with the clutch engaged (you kind of have to experiment on how high to rev), and then slip it into low. As an aside (I know this is getting boring), I used to shift our 8N Ford tractor (all sliding gears), while on the go. Any gearbox with sliding gears can be shifted this way, as most old-time truckers will attest. Practice,practice,practice, and you won't need "no stinking synchro's".
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| tbirdhandyman | -- 07-03-2010 @ 3:10 PM |
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40 Merc: My '66 Mustang 289 has a factory 1st gear synchronized 3 speed transmission (bought new). After driving my '41 Merc and '57 Tbird without the 1st gear synchronized, when I drive the Mustang, I forget that it has that feature, and usually don't use it. I would never go to the expense to change your transmission. Just my 2 cents. Tbirdhandyman
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