Speedometer cable clamps attach points. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jgmc · 03-25-2023, 09:36 PM

My speedometer cable has 2 clamps on it, where do these clamps attach to the frame or inner fender? Anyone have some photos of where the attach?

**pjmoreland** · 03-26-2023, 10:48 AM

My truck has a single clip located on the very front end of the cab floor support rail. Sorry for the poor quality photo.

**71CHEVYSHORTBED402** · 03-26-2023, 03:18 PM

The speedometer cable’s end with the smallest cap inserts into the cab and takes a rubber firewall grommet. The cap screws onto the speedometer in the instrument panel.

• The cable must be lubricated, which is lubricated with graphite for this rebuild.

• One cable retainer mounts to LH cab rail’s top front with a (GR 5) 1/2" hex bolt, hex nut and split washer. The bolt threads are 5/16-18 x 7/8”, and the head is stamped “RCS”. The retainer faces 10 o’clock with its spike placed into the cab rail’s inner hole. The retainer is stamped "3/8" and "4".

• One cable retainer mounts to the RH frame rail’s top using the first hole located in front of the shift control bracket. The retainer mounts with the same hardware described above. This retainer was unmarked.

• The cable’s large cap screws onto the transmission’s LH side a pinch more than finger tight.

**pjmoreland** · 03-26-2023, 03:26 PM

I'm guessing there are variations from year to year. The cab rail clip on my truck is snapped into a hole (no bolt)

jgmc · 03-26-2023, 08:53 PM

Thank you

**pjmoreland** · 03-27-2023, 11:43 AM

Here's a slightly better photo of the clip on my truck. I have a speed sensor cable attached to my speedometer cable for my torque converter clutch lockup controller. There is a nice photo of the clip in this thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=843285

**71CHEVYSHORTBED402** · 03-27-2023, 11:51 AM

Quote:

Originally Posted by pjmoreland

Here's a slightly better photo of the clip on my truck. I have a speed sensor cable attached to my speedometer cable for my torque converter clutch lockup controller. There is a nice photo of the clip in this thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=843285

Like the thread says, learn something new everyday. I suspect your guess is right, perhaps the variances are by year.

**pjmoreland** · 03-27-2023, 11:54 AM

Quote:

Originally Posted by 71CHEVYSHORTBED402

Like the thread says, learn something new everyday. I suspect your guess is right, perhaps the variances are by year.

This thread has brought to my attention that I am likely missing one clip. Time to start looking for one!

**71CHEVYSHORTBED402** · 03-27-2023, 02:35 PM

Quote:

Originally Posted by pjmoreland

This thread has brought to my attention that I am likely missing one clip. Time to start looking for one!

Word is at least some of the clips were blue. Inline Tube sells them in clear or blue. I think the stamps e.g. 3/8" designate the retention diameter.

03-25-2023, 09:36 PM	#1
jgmc Registered User Join Date: Jan 2005 Location: Brier Washington Posts: 117	Speedometer cable clamps attach points. My speedometer cable has 2 clamps on it, where do these clamps attach to the frame or inner fender? Anyone have some photos of where the attach?

03-26-2023, 10:48 AM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: Speedometer cable clamps attach points. My truck has a single clip located on the very front end of the cab floor support rail. Sorry for the poor quality photo. Attached Images

03-26-2023, 03:18 PM	#3
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,129	Re: Speedometer cable clamps attach points. The speedometer cable’s end with the smallest cap inserts into the cab and takes a rubber firewall grommet. The cap screws onto the speedometer in the instrument panel. • The cable must be lubricated, which is lubricated with graphite for this rebuild. • One cable retainer mounts to LH cab rail’s top front with a (GR 5) 1/2" hex bolt, hex nut and split washer. The bolt threads are 5/16-18 x 7/8”, and the head is stamped “RCS”. The retainer faces 10 o’clock with its spike placed into the cab rail’s inner hole. The retainer is stamped "3/8" and "4". • One cable retainer mounts to the RH frame rail’s top using the first hole located in front of the shift control bracket. The retainer mounts with the same hardware described above. This retainer was unmarked. • The cable’s large cap screws onto the transmission’s LH side a pinch more than finger tight. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s details such as OEM identifications& part numbers, written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-26-2023, 03:26 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: Speedometer cable clamps attach points. I'm guessing there are variations from year to year. The cab rail clip on my truck is snapped into a hole (no bolt)

03-26-2023, 08:53 PM	#5
jgmc Registered User Join Date: Jan 2005 Location: Brier Washington Posts: 117	Re: Speedometer cable clamps attach points. Thank you

03-27-2023, 11:43 AM	#6
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: Speedometer cable clamps attach points. Here's a slightly better photo of the clip on my truck. I have a speed sensor cable attached to my speedometer cable for my torque converter clutch lockup controller. There is a nice photo of the clip in this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=843285 Attached Images



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