Fuel tank sending unit

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Gordon67dartgt

Gordon67dartgt

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I purchased a new fuel tank (Classic #FT6002A) and sending unit from Classic Industries for my 67 Dart GT. After much hassle getting the sending unit (Classic part # MF430) into the tank, it seems the pick up bottoms out before the face becomes flush with the mounting hole. The offset on the sending unit fuel pick up is approximately 6" while the distance for the center of the sending unit hole to the bottom of the tank is about 5". Any ideas? Anybody who might have a correct part # and/or manufacturer?
 
Hope you have better luck than I did on anything "new"

Pictures would help. If you can rebuild the old unit that would probably be best. Otherwise, side by side with the original and try to match the bend, though I've not heard of that approach being successful. Never mind getting into the old, analog contacts as compared to the new ones.

Good luck. Hope someone has a good answer. :popcorn:
 
WV64Signet said:
Hope you have better luck than I did on anything "new"

Pictures would help. If you can rebuild the old unit that would probably be best. Otherwise, side by side with the original and try to match the bend, though I've not heard of that approach being successful. Never mind getting into the old, analog contacts as compared to the new ones.

Good luck. Hope someone has a good answer. :popcorn:
Click to expand...
Can't find the original, must have thrown it out (bad idea) so nothing to compare it to. I do have the original tank and all the dimensions are the same as the new tank so that can't be the issue either.
 
Here's the example from my 64
Gordon67dartgt said:
Can't find the original, must have thrown it out (bad idea) so nothing to compare it to. I do have the original tank and all the dimensions are the same as the new tank so that can't be the issue either.
Click to expand...

The long straight unit is the original.

The angled one is what is sold as being correct. :wtf:

Recommend finding the parts book and seeing what that shows ... (download or if someone can grab a photo)

IMG_20240831_201032989_HDR_AE~3.jpg


IMG_20240831_200621779_HDR_AE~3.jpg
 
If I recall correctly, the original one looked like the pic with the straight rod and the replacement looks exactly like the bottom pic. Yours seems to fit. I may try straightening the rod at the upper bend a bit. Any other ideas?
 
Gordon67dartgt said:
If I recall correctly, the original one looked like the pic with the straight rod and the replacement looks exactly like the bottom pic. Yours seems to fit. I may try straightening the rod at the upper bend a bit. Any other ideas?
Click to expand...
Look at the sending unit for the A100.

I still think the "electrical" feed is iffy

eClassics 1964-1970 Dodge A100 Truck Fuel Sending Unit 5/16" Stainless Steel - eClassics.com eClassics 1964-1970 Dodge A100 Truck Fuel Sending Unit 5/16" Stainless Steel
 
Gordon67dartgt said:
Not sure if I could, and if I did would it screw up the float and perhaps fuel gauge reading
Click to expand...
You can bend the tube below the sender guts with out effecting the senders accuracy.

And on the subject of accuracy... It will read full for about 1/4 of a tank then read 1/4 to 1/2 for 1/2 a tank. Then empty for the final 1/4 tank

Having an OEM rebuilt is the only way to get an accurate sender .

A meter match can help too.
 
All I can add is, if you buy from Classic Industries, you get exactly what you pay for. JUNK. That's what they're good at selling. They find the absolute cheapest products they can and pass off crap to their customers. I've had great luck with Spectra gas tanks and sending units. Although some say the senders are not accurate, they serve me well. They are stainless and they at least fit and work.
 
I have had good luck with a meter match for a number of years, but they have doubled in price, at least.
 
Good morning all,

I see quite the discussion on the matter.

I have a new tank that I plan on putting in as I'm switching to an electric fuel pump, new fuel link etc with a new carb and manifold.

With that said I am in the process of cleaning and sealing the new tank I've had for years and I found 2 sending units.

Based on the discussion about it sounds like you all don't like these style for accuracy etc due to the short arm.

If I do use these. Any thoughts on the different floats?

PXL_20260310_155033001.jpg
 
RioGrandMan said:
Good morning all,

I see quite the discussion on the matter.

I have a new tank that I plan on putting in as I'm switching to an electric fuel pump, new fuel link etc with a new carb and manifold.

With that said I am in the process of cleaning and sealing the new tank I've had for years and I found 2 sending units.

Based on the discussion about it sounds like you all don't like these style for accuracy etc due to the short arm.

If I do use these. Any thoughts on the different floats?

View attachment 1716519263
Click to expand...

The float really doesn’t do much. Somewhere on this forum is a really good thread that explains it all once you see it explained with a piece of cardboard and a sending unit with graduated marks you’ll clearly understand why the geometry of the short arm is a total fail. But you’ll see it’ll stay full for over a quarter of a tank and then it’ll drop to empty in 50 miles and then it’ll be on empty, but you’ll still have a quarter (or more) of a tank so really with the short arm it only moves for less than half a tank’s worth. A meter match is useless because for more than a half a tank the unit is pegged either full or empty.
 
Last edited:
Jim Kueneman said:
The float really doesn’t do much. Somewhere on this forum is a really good thread that explains it all once you see it explained with a piece of cardboard and a sending unit with graduated marks you’ll clearly understand why the geometry of the short arm is a total fail. But you’ll see it’ll stay full for over a quarter of a tank and then it’ll drop to empty in 50 miles and then it’ll be on empty, but you’ll still have a quarter (or more) of a tank so really with the short arm it only moves for less than half a tank’s worth. A meter match is useless because for more than a half a tank the unit is pegged either full or empty.
Click to expand...
Ok thanks, I'll look for that. Is it the sot of thing that cash be fixed with a longer arm or something? Or is there a better replacement? The one mentioned from vans auto sounds better geometry but not resulting in better electrical output/reading.
 
It MUCH closer in reading than the short arm. It actually moves from the moment to fuel level starts to go down and continues to move all the way to the bottom. What is not quite right still is there rate it move from full to empty does not quite track the amount of gas in the tank. That problem CAN be fixed with the Meter Match... with the A100 unit and a Meter Match you CAN have a very accurate gas gauge. I have found the A100 is more than adaquate (you may need to bend the arm some to get it more centered in the tank).
 
Ok thank you. It looks like the meter match is on the electrical side and I can probably add that later. I will look for the a 100 sending unit ASAP for the install.

Side note. Any advice for cleanly draining and dropping the tank (66 B-cuda).
 
RioGrandMan said:
Ok thank you. It looks like the meter match is on the electrical side and I can probably add that later. I will look for the a 100 sending unit ASAP for the install.

Side note. Any advice for cleanly draining and dropping the tank (66 B-cuda).
Click to expand...

Drive it till it runs out :) should be easy without a gauge! I use a floor jack with a piece of plywood once it is run low.
 
Jim Kueneman said:
Buy the A100 unit from Vans. It is not 100% accurate since it is wound linear but has the correct long arm so it is WAY closer.

Sending Unit 5/16" 1964 - 1970 Dodge A100 Van & Truck
Click to expand...
I've been reading threads and searching online for 2 days trying to figure out what to do. I even looked on eBay to see if there were factory units I could have rebuilt. This morning I finally said to heck with it and took your advice. I got the unit in your link from Vans. if it bothers me bad enough, maybe I'll get a meter match down the road.
 

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