The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Gas tank sending unit 1975 C-10???

**hatzie** · 07-24-2016, 05:21 PM

The problem with most aftermarket senders is the float arm pivot is used to pass the rheostat wiper ground. The float arm doesn't make good contact with the gauge body through the pivot when the vehicle is in motion because it can't be tight enough to bind up and has problems with contact because of that.
I would guess the ACD senders have a better engineered conductor arrangement from the wiper to the stationary sender body. You could accomplish the same by soldering copper braid from the float arm to the suction pipe or some other close stationary part of the sender.
The other option is to damp the actual fuel gauge with a special non hardening damping gel to slow the shaft movement.

07-24-2016, 05:21 PM	#9
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,022	Re: Gas tank sending unit 1975 C-10??? The problem with most aftermarket senders is the float arm pivot is used to pass the rheostat wiper ground. The float arm doesn't make good contact with the gauge body through the pivot when the vehicle is in motion because it can't be tight enough to bind up and has problems with contact because of that. I would guess the ACD senders have a better engineered conductor arrangement from the wiper to the stationary sender body. You could accomplish the same by soldering copper braid from the float arm to the suction pipe or some other close stationary part of the sender. The other option is to damp the actual fuel gauge with a special non hardening damping gel to slow the shaft movement. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 07-24-2016 at 05:54 PM.