The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Turbo Hydra-matic tranny speedometer not working

cppursell · 07-03-2009, 02:17 AM

Hi everyone, I'm hoping you can help my dilemma.

Ever since I've had my '67 Chevy C10, the speedometer hasn't worked.

I'm pretty sure I have a 350 Turbo Hydra-matic transmission.
I looked under the truck and I noticed that the speedo cable is attached to this box-looking device which connects to the transmission. I thought that was just a third-party gear reducer or something, but it seems to be part of the transmission, 'cause if I take that away, there's no way to directly connect the speedo cable to the tranny. Looking at the box-thing, there seems to be a missing part inside the end that plugs into the tranny, and that's probably why the speedometer doesn't work.
Are you familiar with this box device, is it part of the transmission, how can I fix it?

I hope I was clear enough...
I don't know what I need to get the speedometer working, but if you can give me any pointers, that'd be great.
Thanks!

07-03-2009, 02:17 AM	#1
cppursell Registered User Join Date: Dec 2008 Location: San Francisco, CA Posts: 144	Turbo Hydra-matic tranny speedometer not working Hi everyone, I'm hoping you can help my dilemma. Ever since I've had my '67 Chevy C10, the speedometer hasn't worked. I'm pretty sure I have a 350 Turbo Hydra-matic transmission. I looked under the truck and I noticed that the speedo cable is attached to this box-looking device which connects to the transmission. I thought that was just a third-party gear reducer or something, but it seems to be part of the transmission, 'cause if I take that away, there's no way to directly connect the speedo cable to the tranny. Looking at the box-thing, there seems to be a missing part inside the end that plugs into the tranny, and that's probably why the speedometer doesn't work. Are you familiar with this box device, is it part of the transmission, how can I fix it? I hope I was clear enough... I don't know what I need to get the speedometer working, but if you can give me any pointers, that'd be great. Thanks!