My 71 has a very loud squeeking speedo cable (sounds like a bunch of cherping birds). How do I change the cable? Can I do it from under the car or do I have to take the dash out? Thanks for your help.

 

I replaced mine from under the car but I had the transmission out making the reach to the hole in the firewall pretty easy. The cable under the dash was not that bad either. I think you would have the best luck reaching down from the top to get to he rubber grommet on the firewall and pulling the cable out to the engine compartment. You will still have to get under to disconnect the cable and figure out how it is routed up by the transmission. When going back in insert the cable through the firewall and connect to the speedo and then route new cable back to the transmission.

 

My '76 was churping from the dash area and after removing underdash items to access the speedo head, I was able to disconnect the cable, lightly lube it, reinstall it and all was fine. I believe the shop manual says to not lube the first inch or so of the cable. I don't remember the whole job taking more than 1/2 hour or so.

http://forums.corvetteforum.com/c3-t...tructions.html

You can do a search and you'll find a lot more info on the subject.

 

I used car ramps when I did my 74.

This is a very easy job to replace the cable.

You will be both under the car and under the dash. this is a 2 person job, my 15 year old daughter helped me by pulling the cable out thru the fire wall when I lied on the floor and reached up to release the clip. I removed the drivers seat to make the job a whole lot easier. Once I lied down there was a plastic duct running across under the streering wheel that I unscrewed and pulled out. 1 tiny screw I think held it in place.

Once you have the old one pulled out from the dash thru the fire wall, insert the new cable thru the rubber gromet (the hardest part of the job was getting it in the gromet) and push it back into the firewall. Go back under the dash and line up the cable, squeeze the clip and have the other person push the cable in.

After that I went back out to the motor and seated the rubber gromet into the fire wall and dropped the rest of the cable down into the abyss.

Slide under the car from the drivers side and feed the speedo cable away from the exhaust so that it will never touch it and connect it up to the connector at the rear of the tranny. Reinstall the heating duct and the driver seat and you're done.

After doing this and parking break cables, etc. I am definately building myself some of these ramps.
http://forums.corvetteforum.com/c3-g...hoilday-2.html

good luck

 

What does you '71 shop manual recommend?

 

Thanksf all of you help. I will give it a try soon. Thanks again

 

Mine squeaked like crazy too and I lubed it with graphite. Then it jumped around on the gauge under 20 mph. I replace the cable and sheathe together as a unit and problem solved.