Fuel sending unit float

[Cobanche]

The 18 gallon tank in my truck finally sprung a leak, I want to replace it with the 23 gallon tank. I am of the understanding the sending units were the same except the length of the float. Who can tell me what the two lengths are?? I would like to just modify my float to use in the new higher capacity tank.

[89 MJ]

Is your truck a short bed or long bed? The long beds came with a 16 and 23 gallon tank and the short beds came with the 18.5 gallon tank. You cannot interchange a short bed tank and a long bed tank. 

[eaglescout526]

Sending unit between an 18 and 23.5 are the same. It’s the 16 that’s shorter arm. 

[Cobanche]

The truck is an 89 short bed, I can clearly see the third fuel tank strap mount in the frame of this truck. Why would the larger tank not work?

[89 MJ]

8 minutes ago, Cobanche said:

The truck is an 89 short bed, I can clearly see the third fuel tank strap mount in the frame of this truck. Why would the larger tank not work?

The tank will hit the rear axle. This thread talks about it some. Bottom of page 1 and top of page 2 in particular.

 

[Cobanche]

Thanks for digging into this, that thread cleared up what I need to know

[89 MJ]

Happy to help. I sure wish the 23 gallons would fit the short beds.