Speedometer/Cable Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stllookn · 05-22-2003, 01:14 PM

My speedo or cable on my '67 is making a terrible noise...it is intermittent and can happen at any speed. When it is disconnected it makes no noise at all. I can actually feel the vibration on the face of the speedometer when it is happening. My guess is that it is the speedometer and not the cable since there is no noise when it is disconnected from the back of the speedo. Has anyone else had this experience? Perhaps it is a bushing in the speedo that is worn excessively.

gr8scott51 · 05-22-2003, 02:41 PM

Before I changed out my tranny, my speedo made a lot of racket. When I put in the T5 I had to replace the cable with a longer one - no more noise. I'd try that first. Good luck - Scott

progress · 05-22-2003, 02:53 PM

gr8scott, I suspect your noise was because the bends were too tight...visa vie...cable too short. Mine was fine up until recently. I am not sure that is the problem but I will compare it to my other truck. Does anyone know if the TH400 cable is same as the Powerglide?

gr8scott51 · 05-23-2003, 11:58 AM

Changing from the 3 speed to the T5 five speed relocated the speedo connection so the old cable was toooooooo short. It may have had something to do with it being 35 years old - ya think? Don't know about the automatic speedo cables. Hope you get it figured out. Scott

bobs409 · 05-24-2003, 08:53 AM

I would first try lubing the cable. It takes minutes to do.

Just pull the cable out of the housing on the interior side and lube, then slip back in. and test. I like to submerse a cable into a quart of transmission fluid, then lightly dab off the excess and reinstall.

**old Rusty C10** · 05-24-2003, 09:42 AM

sometimes if ya WD40 them they get quiet

05-22-2003, 01:14 PM	#1
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Speedometer/Cable Help My speedo or cable on my '67 is making a terrible noise...it is intermittent and can happen at any speed. When it is disconnected it makes no noise at all. I can actually feel the vibration on the face of the speedometer when it is happening. My guess is that it is the speedometer and not the cable since there is no noise when it is disconnected from the back of the speedo. Has anyone else had this experience? Perhaps it is a bushing in the speedo that is worn excessively. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

05-22-2003, 02:41 PM	#2
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	similar noises Before I changed out my tranny, my speedo made a lot of racket. When I put in the T5 I had to replace the cable with a longer one - no more noise. I'd try that first. Good luck - Scott __________________ Silence is golden, duct tape is silver. - Scott

05-22-2003, 02:53 PM	#3
progress Gotta luv a clean shave Join Date: Jan 2002 Location: Kent, WA Posts: 226	alias "stllookn" gr8scott, I suspect your noise was because the bends were too tight...visa vie...cable too short. Mine was fine up until recently. I am not sure that is the problem but I will compare it to my other truck. Does anyone know if the TH400 cable is same as the Powerglide? __________________ Welding while you wait...you can help if you like and it...might even save you a little as long as you don't mess things up! We make house calls too...just like the old days!

05-23-2003, 11:58 AM	#4
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	speedo cable length Changing from the 3 speed to the T5 five speed relocated the speedo connection so the old cable was toooooooo short. It may have had something to do with it being 35 years old - ya think? Don't know about the automatic speedo cables. Hope you get it figured out. Scott __________________ Silence is golden, duct tape is silver. - Scott

05-24-2003, 08:53 AM	#5
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	I would first try lubing the cable. It takes minutes to do. Just pull the cable out of the housing on the interior side and lube, then slip back in. and test. I like to submerse a cable into a quart of transmission fluid, then lightly dab off the excess and reinstall. __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

05-24-2003, 09:42 AM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	sometimes if ya WD40 them they get quiet __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

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