Speedometer/Odometer took a dump... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67ChevyRedneck · 11-04-2015, 07:34 PM

I was driving along and all of a sudden I noticed my speedometer needle bouncing back and forth between 30/70mph non stop. The bouncing back and forth gets worse with greater speeds.

The odometer had rolled over a couple years ago and showed around 6,000 miles. It completely rolled back to zero and stopped working...

Never seen anything like that before.

Any guesses as to what broke before I get the dash out (probably be a couple/few weeks).

wreckedchevy · 11-04-2015, 08:03 PM

i'm on my 4th one this year the one started going so crazy it broke the needle off.

67ChevyRedneck · 11-04-2015, 08:15 PM

4th???

New aftermarket ones or old used OEM ones???

Mine was the original.

tdangle · 11-04-2015, 08:20 PM

Until I got to the part about the odometer rolling back to zero, I was going to suggest the cable. I had a cable wear at a bend and as it was unwinding the strands the speedo was going crazy.

My guess is the speedo itself is broke. Good Luck

**LockDoc** · 11-04-2015, 08:38 PM

-
If you haven't already you need to remove the speedo cable assembly, pull the cable out of the sheath, wash the cable with solvent and flush the sheath out with solvent, PB Blaster, or Liquid Wrench, then blow it out with an air hose. Lube the cable with some light oil and put it back together. What you are describing is caused by the cable binding in the sheath. Sometimes it will cause the cable to twist inside the sheath ruining the cable.

LockDoc

67ChevyRedneck · 11-04-2015, 08:51 PM

The cable is brand new, well maybe 6 months old.

I know the cable not being lubed can cause the bouncing, but why did my odometer roll back to zero and quit working?

Redline novdog · 11-04-2015, 08:59 PM

the cable is the bouncing.even if new needs lube! the odometer is kind of seperate plastic gears that can shear if the speedo cable is whipping as stated. Sounds like a speedo rebuild!

67ChevyRedneck · 11-04-2015, 09:07 PM

Well crap.

I used this from O'Reilly. Maybe I didn't put enough.

http://www.oreillyauto.com/site/c/de...eter+lubricant

toolboxchev · 11-04-2015, 09:32 PM

Could be that silly little box on the transmission, I took mine apart and re-greased it after a good cleaning.

67ChevyRedneck · 11-04-2015, 09:34 PM

I just redid that too, I put a new gear (same P/N as old gear) and new seal in it, trans is a 700R. The trans fluid lubes that.

swamp rat · 11-04-2015, 09:51 PM

Mine was bouncing and i lubed it, the bouncing stopped.

wreckedchevy · 11-05-2015, 02:32 AM

Quote:

Originally Posted by 67ChevyRedneck

4th???

New aftermarket ones or old used OEM ones???

Mine was the original.

buddy of mine has piles of them so I just keep grabbing one from him. I did replace the cable as well because I thought it was the source of my original making a lot of racket but it wasn't. the last one (still in my truck) was working great went about 60 miles and did a big old burnout in a parking lot and it went to heck screaming like a banshee had to pull over and unhook it.

11-04-2015, 07:34 PM	#1
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Speedometer/Odometer took a dump... I was driving along and all of a sudden I noticed my speedometer needle bouncing back and forth between 30/70mph non stop. The bouncing back and forth gets worse with greater speeds. The odometer had rolled over a couple years ago and showed around 6,000 miles. It completely rolled back to zero and stopped working... Never seen anything like that before. Any guesses as to what broke before I get the dash out (probably be a couple/few weeks). __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

11-04-2015, 08:03 PM	#2
wreckedchevy Registered User Join Date: Jun 2013 Location: billings, mt Posts: 703	Re: Speedometer/Odometer took a dump... i'm on my 4th one this year the one started going so crazy it broke the needle off. __________________ 1969 Chevy C10 2wd stepside longbox

11-04-2015, 08:15 PM	#3
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Speedometer/Odometer took a dump... 4th??? New aftermarket ones or old used OEM ones??? Mine was the original. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

11-04-2015, 08:20 PM	#4
tdangle Registered User Join Date: Mar 2005 Location: Jurupa Valley, Ca Posts: 1,210	Re: Speedometer/Odometer took a dump... Until I got to the part about the odometer rolling back to zero, I was going to suggest the cable. I had a cable wear at a bend and as it was unwinding the strands the speedo was going crazy. My guess is the speedo itself is broke. Good Luck __________________ Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC

11-04-2015, 08:38 PM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,655	Re: Speedometer/Odometer took a dump... - If you haven't already you need to remove the speedo cable assembly, pull the cable out of the sheath, wash the cable with solvent and flush the sheath out with solvent, PB Blaster, or Liquid Wrench, then blow it out with an air hose. Lube the cable with some light oil and put it back together. What you are describing is caused by the cable binding in the sheath. Sometimes it will cause the cable to twist inside the sheath ruining the cable. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

11-04-2015, 08:51 PM	#6
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Speedometer/Odometer took a dump... The cable is brand new, well maybe 6 months old. I know the cable not being lubed can cause the bouncing, but why did my odometer roll back to zero and quit working? __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

11-04-2015, 08:59 PM	#7
Redline novdog Registered User Join Date: Jan 2012 Location: Washington,Il Posts: 632	Re: Speedometer/Odometer took a dump... the cable is the bouncing.even if new needs lube! the odometer is kind of seperate plastic gears that can shear if the speedo cable is whipping as stated. Sounds like a speedo rebuild! __________________ It builds on my intelligence when I make a mistake, Boy am I building on it! '67 C-10,'70 Nova SS

11-04-2015, 09:07 PM	#8
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Speedometer/Odometer took a dump... Well crap. I used this from O'Reilly. Maybe I didn't put enough. http://www.oreillyauto.com/site/c/de...eter+lubricant __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

11-04-2015, 09:32 PM	#9
toolboxchev Registered User Join Date: Jul 2015 Location: 2nd left past the stump on a dirt road. Posts: 2,629	Re: Speedometer/Odometer took a dump... Could be that silly little box on the transmission, I took mine apart and re-greased it after a good cleaning.

11-04-2015, 09:34 PM	#10
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Speedometer/Odometer took a dump... I just redid that too, I put a new gear (same P/N as old gear) and new seal in it, trans is a 700R. The trans fluid lubes that. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

11-04-2015, 09:51 PM	#11
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: Speedometer/Odometer took a dump... Mine was bouncing and i lubed it, the bouncing stopped. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's



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