Speedometer cable - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pat · 03-21-2003, 08:01 PM

My truck doesnt have a speedometer cable so I bought one, i think 50 inches. It has a 350 with a 350 automatic. Is this the right length cable? How would I go about putting this in, what firewall hole do I use? Appreciate any help.

Reumster · 03-21-2003, 08:11 PM

Use any hole you want as long as you try to keep the cable from sharp bends. That is the important part. AutoMeter has Speedo cableless speedometers. That is what I'm going to be using.

Blue Beard · 03-21-2003, 11:15 PM

Reumster:

What does the cableless speedomters use in place of the cable, electroics?

JimKshortstep4x4 · 03-22-2003, 07:34 AM

50" seems short to me. The hole you want is shown on this thread. 1971Stepside did a nice job on labelling the firewall holes in this thread.

http://67-72chevytrucks.com/vboard/s...firewall+holes

Jim

pat · 03-22-2003, 02:36 PM

Thanks for the help so far. If 50 is too short, does anyone know the correct length?

Reumster · 03-22-2003, 05:13 PM

The electric speedos are spendy, they use a little box that bolts to the side of the tranny, and two little wires run to the back of the speedo. It's easily calibrated, you can change tire size, gears,etc... and just hit a button and it acurate to 2 mph or so

JimKshortstep4x4 · 03-22-2003, 08:26 PM

I just measured a cable out of a 71 w/TH350 2 wheel drive and it is 61" long.

LMC lists cables at 63" and 83" which would be used for the 2 wd and 4 wd respectively.

Jim

GMC71k20 · 03-23-2003, 12:55 AM

where can you get the electronic ones? i plan on switching tires and gears often so it could be usefull

Blue Beard · 03-23-2003, 09:18 AM

I guess if the electronic ones are expensive, and you still have to run wiring to the dash...........along with the within 2 miles idea.............don't see this to be any advantage.

If you think about the price of a new cable with or without a new housing, and how long they will last under normal use.............don't see any advantage for the normal user. Street rods that want a clean look, yes.

pat · 03-23-2003, 12:14 PM

Thanks for measuring one for me Jim. Helps a lot, I guess Ill return my short one and get a longer one

Blue Beard · 03-23-2003, 12:44 PM

I have bought just the cable, that was universal. Just cut it off and put the fitting on the other end.....doesn't hurt to add a little soldier job.

03-21-2003, 08:01 PM	#1
pat Senior Member Join Date: Jul 2002 Location: Lindsay, TX Posts: 1,245	Speedometer cable My truck doesnt have a speedometer cable so I bought one, i think 50 inches. It has a 350 with a 350 automatic. Is this the right length cable? How would I go about putting this in, what firewall hole do I use? Appreciate any help. __________________ 68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille

03-21-2003, 08:11 PM	#2
Reumster L.E.D. Freak Join Date: Jan 2002 Location: Polson MT Posts: 1,358	Use any hole you want as long as you try to keep the cable from sharp bends. That is the important part. AutoMeter has Speedo cableless speedometers. That is what I'm going to be using. __________________ Specializing in Custom L.E.D. inserts. http://www.ccled.com/ Contact me @ blazer2wd1972@hotmail.com (406)675-8082 or Joel @ jmcwaters@eps-corp.net 1972 2wd Blazer, 350/700R4/3:73 posi, err & Custom L.E.D. inserts! LOL

03-21-2003, 11:15 PM	#3
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	Reumster: What does the cableless speedomters use in place of the cable, electroics? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

03-22-2003, 02:36 PM	#5
pat Senior Member Join Date: Jul 2002 Location: Lindsay, TX Posts: 1,245	Thanks for the help so far. If 50 is too short, does anyone know the correct length? __________________ 68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille

03-22-2003, 05:13 PM	#6
Reumster L.E.D. Freak Join Date: Jan 2002 Location: Polson MT Posts: 1,358	The electric speedos are spendy, they use a little box that bolts to the side of the tranny, and two little wires run to the back of the speedo. It's easily calibrated, you can change tire size, gears,etc... and just hit a button and it acurate to 2 mph or so __________________ Specializing in Custom L.E.D. inserts. http://www.ccled.com/ Contact me @ blazer2wd1972@hotmail.com (406)675-8082 or Joel @ jmcwaters@eps-corp.net 1972 2wd Blazer, 350/700R4/3:73 posi, err & Custom L.E.D. inserts! LOL

03-22-2003, 07:34 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	50" seems short to me. The hole you want is shown on this thread. 1971Stepside did a nice job on labelling the firewall holes in this thread. http://67-72chevytrucks.com/vboard/s...firewall+holes Jim

03-22-2003, 08:26 PM	#7
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	I just measured a cable out of a 71 w/TH350 2 wheel drive and it is 61" long. LMC lists cables at 63" and 83" which would be used for the 2 wd and 4 wd respectively. Jim

03-23-2003, 12:55 AM	#8
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	where can you get the electronic ones? i plan on switching tires and gears often so it could be usefull

03-23-2003, 09:18 AM	#9
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	I guess if the electronic ones are expensive, and you still have to run wiring to the dash...........along with the within 2 miles idea.............don't see this to be any advantage. If you think about the price of a new cable with or without a new housing, and how long they will last under normal use.............don't see any advantage for the normal user. Street rods that want a clean look, yes. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

03-23-2003, 12:14 PM	#10
pat Senior Member Join Date: Jul 2002 Location: Lindsay, TX Posts: 1,245	Thanks for measuring one for me Jim. Helps a lot, I guess Ill return my short one and get a longer one __________________ 68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille

03-23-2003, 12:44 PM	#11
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	I have bought just the cable, that was universal. Just cut it off and put the fitting on the other end.....doesn't hurt to add a little soldier job. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

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