Speedo Trouble - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bums · 10-22-2009, 10:00 PM

I have just bought a 78 chevy 4x4 1/2 ton with a 203 transfer case. It seems
to be a good truck. One of the few problems with it is the speedometer does not work. After some investigation found the problem to be the speedometer gear. It has 22 teeth and has the letter "M" stamped on the shaft. I have been to several 4x4 shops and can not find one. Does anyone know where I
can get one? New or used

72blue · 10-23-2009, 01:58 AM

stuff like that I have to resort to the junk yard.

**special-K** · 10-23-2009, 06:00 AM

Junkyard,4wd guys like here on this site,and i`m thinking thedealership would have it.do you still have yours?they vary by rear ratio.They are color coded,I believe,by ratio.

OrrieG · 10-23-2009, 12:24 PM

Quote:

Originally Posted by bums

I have just bought a 78 chevy 4x4 1/2 ton with a 203 transfer case. It seems
to be a good truck. One of the few problems with it is the speedometer does not work. After some investigation found the problem to be the speedometer gear. It has 22 teeth and has the letter "M" stamped on the shaft. I have been to several 4x4 shops and can not find one. Does anyone know where I
can get one? New or used

I found mine at the Chevy dealer parts counter. I need to change the gear to compensate for my tire size, rear end and stock 59 speedo. It was like $5 or less if I remember right.

10-22-2009, 10:00 PM	#1
bums Registered User Join Date: Sep 2009 Location: Longview Texas Posts: 7	Speedo Trouble I have just bought a 78 chevy 4x4 1/2 ton with a 203 transfer case. It seems to be a good truck. One of the few problems with it is the speedometer does not work. After some investigation found the problem to be the speedometer gear. It has 22 teeth and has the letter "M" stamped on the shaft. I have been to several 4x4 shops and can not find one. Does anyone know where I can get one? New or used

10-23-2009, 01:58 AM	#2
72blue Registered User Join Date: Feb 2009 Location: arroyo grande, ca Posts: 206	Re: Speedo Trouble stuff like that I have to resort to the junk yard. __________________ James

10-23-2009, 06:00 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: Speedo Trouble Junkyard,4wd guys like here on this site,and i`m thinking thedealership would have it.do you still have yours?they vary by rear ratio.They are color coded,I believe,by ratio. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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