rear mount gas tank questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hillbilly Deluxe 65 · 12-13-2008, 03:56 PM

whats goin on guys i went and bought that rear mount tank from LMC and got it all in fine and everything but the sending unit acts like it is a different amount of ohms for the guage, i know the original sending unit in the tank behind the seat was 90 ohms and the guage works fine with that but with the rear mount one it only goes up to 3/4s tank even with the unit out of the tank and me holding it all the way up

hope somebody can help
LZ

tommys66 · 12-13-2008, 04:27 PM

I was thinking the sending unit was 0-30ohm. Do you have an ohm meter to check your old sending unit vs new?

**Chevy Fleetside** · 12-13-2008, 04:32 PM

The original 60's fuel gauge is 0-30ohms not 0-90 ohms. You can order another sending unit and keep the 90 just in case you ever change your gauges. Or maybe someone here knows which resister to use to get it to read right.

Hillbilly Deluxe 65 · 12-13-2008, 07:28 PM

ok yea i had to get some resistors thanks for the help guys

12-13-2008, 03:56 PM	#1
Hillbilly Deluxe 65 Wheelin' and Dealin' Join Date: Nov 2007 Location: poquoson va Posts: 320	rear mount gas tank questions whats goin on guys i went and bought that rear mount tank from LMC and got it all in fine and everything but the sending unit acts like it is a different amount of ohms for the guage, i know the original sending unit in the tank behind the seat was 90 ohms and the guage works fine with that but with the rear mount one it only goes up to 3/4s tank even with the unit out of the tank and me holding it all the way up hope somebody can help LZ __________________ 1965 Chevy c-10 fleetside long bed with 06 gto LS2/T56 inside Porterbuilt Extreme front and rear 12bolt w/ eaton tru-trac 4:11 gears 1BADD65 my build thread: http://67-72chevytrucks.com/vboard/s...=1#post2601700

12-13-2008, 04:27 PM	#2
tommys66 Registered User Join Date: Oct 2008 Location: Southern, MO Posts: 233	Re: rear mount gas tank questions I was thinking the sending unit was 0-30ohm. Do you have an ohm meter to check your old sending unit vs new?

12-13-2008, 04:32 PM	#3
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: rear mount gas tank questions The original 60's fuel gauge is 0-30ohms not 0-90 ohms. You can order another sending unit and keep the 90 just in case you ever change your gauges. Or maybe someone here knows which resister to use to get it to read right. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 12-13-2008 at 04:33 PM.

12-13-2008, 07:28 PM	#4
Hillbilly Deluxe 65 Wheelin' and Dealin' Join Date: Nov 2007 Location: poquoson va Posts: 320	Re: rear mount gas tank questions ok yea i had to get some resistors thanks for the help guys __________________ 1965 Chevy c-10 fleetside long bed with 06 gto LS2/T56 inside Porterbuilt Extreme front and rear 12bolt w/ eaton tru-trac 4:11 gears 1BADD65 my build thread: http://67-72chevytrucks.com/vboard/s...=1#post2601700

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