79 Speedo Bounces
Thread Starter
Instructor
Joined: Jan 2014
Posts: 214
Likes: 36
From: Sydney NSW
79 Speedo Bounces
The Speedo needle bounces at below 35 to 45 mph (no consistent point). I have had the speedo refurbished, a new cable and new 18 tooth gear installed. I also have a 90' degree speedo cable adapter installed.
Any thoughts on what may be causing the bounce?
Any thoughts on what may be causing the bounce?
Thread Starter
Instructor
Joined: Jan 2014
Posts: 214
Likes: 36
From: Sydney NSW
I have an aftermarket cruise control from Rosta Precision Controls, there is a Rostra Vehicle Speed Sensors 250-4160 between the gearbox and the 90 degree adapter
http://www.summitracing.com/int/parts/rpc-250-4160
http://www.summitracing.com/int/parts/rpc-250-4160
Pro
Joined: Aug 2007
Posts: 707
Likes: 31
From: Pitman NJ
My speed o was bouncing on my 79, and eventually stopped working. The issue that I had, was with the lower cable was bad. What happens is that the transducer (mine is the original) as it wares, puts additional tension on the lower cable, until it eventually breaks.
Now, my cruse control was not working, so i just put in one long cable and all is good.
I"m not sure if this helps, since you have an aftermarket system. Would it be possible to bypass the cruse to see if that solves the problem? I"m not sure if the cable is long enough to do that.
Now, my cruse control was not working, so i just put in one long cable and all is good.
I"m not sure if this helps, since you have an aftermarket system. Would it be possible to bypass the cruse to see if that solves the problem? I"m not sure if the cable is long enough to do that.
Thread Starter
Instructor
Joined: Jan 2014
Posts: 214
Likes: 36
From: Sydney NSW
hope to swap a few bits around in the next day or so and see if that makes a difference ie put the sensor after the 90 degree adapter .. could be that the cable is bad but we'll see
