speedometer bounces........ - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jef5150 · 09-18-2003, 09:29 PM

ive got a 69 6cyl,4-speed,,,,,,after about 25 mph,the needle on the speedometer bounces about 5mph,,,,,anyone know? ,bad speedometer? stretched cable?,,,,,,jeff

Fred T · 09-18-2003, 09:49 PM

Usually means the cable is either bad or needs lube.

DANL · 09-18-2003, 09:50 PM

Try removing the cable and spraying it with lithium.

...Dan

MOTHERTRUCKERS · 09-18-2003, 09:57 PM

Detach it at both ends and spray some brake or carb cleaner thru it then some (spelling check) grafite dry lube.

tyger25 · 09-18-2003, 10:04 PM

I just bought a new cable at Auto Zone for $8!

*dtlilly* · 09-18-2003, 11:29 PM

Napa charged me $19!!!

Locutus · 09-18-2003, 11:58 PM

It could be the gear in the tranny also. My 72 did that it would bounce wildly till the the plastic gear finally grenaded and quit totally. Replaced the gear everything was great.

Hotrod70C10 · 09-19-2003, 12:05 AM

My cable was a little loose at the back of the speedo... Mine quit bouncing after I tightened it. I did lube it soon after though when I replaced the bezel and installed a tach in the tach hole.

jef5150 · 09-19-2003, 01:02 AM

thanks guys,guess i'll start at 1 end and work to the other,,,,,

Castiron9 · 09-19-2003, 01:25 AM

I could care less about your bouncy..speedometer..LOL...

But could you just post more threads so I can see your avatar.........."Oh Baby"...........

And I thought my avatar was nice,,,,,,,,,,,,,,,,,,,,

blazer1971 · 09-19-2003, 10:47 PM

Anyone! How do you remove the plastic gear in a th350 that drives the speedometer?

Locutus · 09-19-2003, 10:58 PM

You have to remove the drive shaft, then remove the tail shaft. Then the gear is held on by a little clip I think. I have never removed one. Mine was in little pieces in the tail shaft. I remember putting in on was easy enough.

bobs409 · 09-20-2003, 12:06 PM

I recently changed one in a TH 350. There is a metal clip as mentioned but they seem to be pressed on a bit too. I pryed on it to remove and when it let go, it flew to the back of the garage! They are plastic but tough. (just becareful of the edges if you want to save it) GM dealers have new ones for under $4.00 but you can get them used at auto transmission shops for like a buck.

Oh yeh, when putting in a new one, use a pipe or similar and tap it on straight or it can snap in two.

For the speedometer cable, just disconnect it from the back of the speedometer and pull the cable out of the cable housing. Then lube it and reinstall. (I like to submerge the cable into a quart of trans fluid, then dab off the excess)

blazer1971 · 09-21-2003, 04:57 PM

Mine is in a 4x4 so the gear is in the transfer case. Now how is this gear removed?
Anyone

09-18-2003, 09:29 PM	#1
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	speedometer bounces........ ive got a 69 6cyl,4-speed,,,,,,after about 25 mph,the needle on the speedometer bounces about 5mph,,,,,anyone know? ,bad speedometer? stretched cable?,,,,,,jeff

09-18-2003, 09:49 PM	#2
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Usually means the cable is either bad or needs lube. __________________ Fred There is no such thing as too much cam...just not enough engine.

09-18-2003, 09:50 PM	#3
DANL Senior Member Join Date: Mar 2002 Location: Bartlett, TN Posts: 348	Lithium Try removing the cable and spraying it with lithium. ...Dan

09-18-2003, 09:57 PM	#4
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	Detach it at both ends and spray some brake or carb cleaner thru it then some (spelling check) grafite dry lube. __________________ Rest in Peace Ed. Thanks for all the good times.

09-18-2003, 10:04 PM	#5
tyger25 Registered User Join Date: Jun 2003 Location: Little Rock, Ar Posts: 124	I just bought a new cable at Auto Zone for $8! __________________ U.S.A.F. 68' C-10 Stepside 305 w/ 4 speed

09-18-2003, 11:29 PM	#6
dtlilly Account Suspended Join Date: Jan 2003 Location: Shadow of Lambeau Field Posts: 5,597	Napa charged me $19!!!

09-18-2003, 11:58 PM	#7
Locutus Registered User Join Date: Jan 2003 Location: Santa Fe, Texas Posts: 250	It could be the gear in the tranny also. My 72 did that it would bounce wildly till the the plastic gear finally grenaded and quit totally. Replaced the gear everything was great.

09-19-2003, 12:05 AM	#8
Hotrod70C10 Low & Slow Join Date: Dec 2002 Location: Oklahoma Posts: 1,047	My cable was a little loose at the back of the speedo... Mine quit bouncing after I tightened it. I did lube it soon after though when I replaced the bezel and installed a tach in the tach hole. __________________ 70' C-10 LWB Fleetside 4.5/6 drop

09-19-2003, 01:02 AM	#9
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	thanks guys,guess i'll start at 1 end and work to the other,,,,,

09-19-2003, 01:25 AM	#10
Castiron9 72 LONGHORN OWNER Join Date: Sep 2002 Location: Seattle Wash. Posts: 963	I could care less about your bouncy..speedometer..LOL... But could you just post more threads so I can see your avatar.........."Oh Baby"........... And I thought my avatar was nice,,,,,,,,,,,,,,,,,,,, __________________ 72-SUPER CHEYENNE/20 LONGHORN 70-C/30 DUALLY

09-19-2003, 10:47 PM	#11
blazer1971 Registered User Join Date: Apr 2001 Location: apollo bch,fl. usa Posts: 134	Anyone! How do you remove the plastic gear in a th350 that drives the speedometer?

09-19-2003, 10:58 PM	#12
Locutus Registered User Join Date: Jan 2003 Location: Santa Fe, Texas Posts: 250	You have to remove the drive shaft, then remove the tail shaft. Then the gear is held on by a little clip I think. I have never removed one. Mine was in little pieces in the tail shaft. I remember putting in on was easy enough.

09-20-2003, 12:06 PM	#13
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	I recently changed one in a TH 350. There is a metal clip as mentioned but they seem to be pressed on a bit too. I pryed on it to remove and when it let go, it flew to the back of the garage! They are plastic but tough. (just becareful of the edges if you want to save it) GM dealers have new ones for under $4.00 but you can get them used at auto transmission shops for like a buck. Oh yeh, when putting in a new one, use a pipe or similar and tap it on straight or it can snap in two. For the speedometer cable, just disconnect it from the back of the speedometer and pull the cable out of the cable housing. Then lube it and reinstall. (I like to submerge the cable into a quart of trans fluid, then dab off the excess) __________________ 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

09-21-2003, 04:57 PM	#14
blazer1971 Registered User Join Date: Apr 2001 Location: apollo bch,fl. usa Posts: 134	Mine is in a 4x4 so the gear is in the transfer case. Now how is this gear removed? Anyone



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