Speedometer & Tachometer Inner Cable Replacement

[Bill B.]

Howdy everyone!

A quick question on replacement inner core cables for Speedo & Tach.

I see AC P/N 620LH (GM P/N 6479185) is available from as NOS from multiple sources on ebay.

I am just curious what the "LH" means. All I can think of is "left hand", which is intended to drive the instruments in the opposite direction.

Is the 620LH acceptable for use as a replacement in our mechanical drive units?

Thanks!

[Joe L.]

Re: Speedometer & Tachometer Inner Cable Replacement

Howdy everyone!

A quick question on replacement inner core cables for Speedo & Tach.

I see AC P/N 620LH (GM P/N 6479185) is available from as NOS from multiple sources on ebay.

I am just curious what the "LH" means. All I can think of is "left hand", which is intended to drive the instruments in the opposite direction.

Is the 620LH acceptable for use as a replacement in our mechanical drive units?

Thanks!

Bill-------


Well, I don't know what the "LH" suffix of the AC part number refers to but I don't think it has anything to do with cable rotation. In any event, the GM #6479185 is a SERVICE speedometer inner cable applicable to applications requiring an 81" to 172" inner cable. It might be usable for a tachometer drive application but it was never cataloged for such an application.

However, I do not recommend its use for speedometer applications. The GM #6479185 is designed to be cut to the required length and a plastic tip then installed on the instrument end. This design has been proven to be very problematic. A better solution is the use of cable GM #88960343 which remains available from GM to this day. It's of the same length as the 6479185 and is cut to the required length. Then, a steel tip is installed using a small tool supplied with the kit.

The best solution is to have a speedometer shop make you up a cable.

[Joe R.]

Re: Speedometer & Tachometer Inner Cable Replacement

The following shop has proven to be very reliable!

Deluxe Speedometer Service
John Rullo
2330 S. Kalamath Street
Unit A
Denver, Colorado 80223

1 303 629-6958
1 888 907-6505

[Bill B.]

Re: Speedometer & Tachometer Inner Cable Replacement

Thanks Joe & Joe !

B

[Pat H.]

Re: Speedometer & Tachometer Inner Cable Replacement

Would this cable work for a tach on a C 1?

[Joe L.]

Re: Speedometer & Tachometer Inner Cable Replacement

Would this cable work for a tach on a C 1?

Pat------


All I can tell you is that it was never cataloged by GM for that application. However, I do think it would work. But, the deficiency I described above would still apply.

[Paul Y.]

Re: Speedometer & Tachometer Inner Cable Replacement

I agree, we are blessed to have this old establishment in our city. Paul

The following shop has proven to be very reliable!

Deluxe Speedometer Service
John Rullo
2330 S. Kalamath Street
Unit A
Denver, Colorado 80223

1 303 629-6958
1 888 907-6505

[Michael L.]

Re: Speedometer & Tachometer Inner Cable Replacement

Why bother replacing the inner cable? I used re-pop cables I sourced from a vendor on my 69 resto and they work flawlessly with zero bounce in either the tack or speedo, and they came ready to install with zero issues. I removed the inner cable and applied a light coating of kable ease and then reinstalled the inner cable, prior to installing on the car. Unless you're focusing on originality for a very special car, I think I would just get new cables IMHO.

Amazon.com: KABLE-Ease Cable and Chain Lubricant for All Control Cables - Stops and Prevents Cable Breakage : Automotive

Mike

[Pat H.]

Re: Speedometer & Tachometer Inner Cable Replacement

It was just a thought. The cables on my 59 are original, which I found years ago. The tach is fine its just the speed that has some bounce at low speed when you start to accelerate but then it fine. I did use Cable ease prior to installing it

[Joe L.]

Re: Speedometer & Tachometer Inner Cable Replacement

The needle bounce problem is most likely not related to a tach cable but more likely related to an instrument problem

[Pat H.]

Re: Speedometer & Tachometer Inner Cable Replacement

The spedo was rebuilt by Corvette Clocks by Roger about 15 years ago. Maybe it's time but its a PIA to remove the dash