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Home » Public Forums » GMCnet » New Cruise Transducer Disk Gap when new?
New Cruise Transducer Disk Gap when new? [message #318967] Tue, 13 June 2017 23:31 Go to previous message
John Heslinga   Canada
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma:
Senior Member
Does anyone know what the new gap is between the Magnet Disk (Drive disk) and the Speed Disk (Vacuum Control) is on a Brand new (or specifications) Cruise Control Transducer? I have at least a dozen transducers and they are all so worn that the disks are crashing. I am currently repairing one and need to machine the pin and bushing to create the appropriate gap.
Any service manual Ive seen states that the Transducer needs replacing if it does not work properly. (OK BUT!!) I've looked in a lot of other places and have not been able to find this specification. (nor its discussion for that matter) I'm (educated)guessing that about .038" is about what it should be. Any help on this would be appreciated. The following Photos may help identify what I need.

Thanks a million. John Heslinga

This is the Magnet Disk. (driven by the speedometer cable coming from the transmission.)
http://www.gmcmhphotos.com/photos/discussion-photos/p63320-cruise-control-transducer-magnet-disk.html


This is the Speed Disk that has a rotational force applied to it by the rotating magnet. Note that I have a feeler gauge indicating that I need this gap measurement.

http://www.gmcmhphotos.com/photos/discussion-photos/p63321-cruise-control-transducer-speed-disk.html


This is the assembly of magnet disk and speed disk. In this case the two disks have no gap. I need to know what the specified gap should be for these two disks.

http://www.gmcmhphotos.com/photos/discussion-photos/p63322-cruise-control-transducer-magnet-and-speed-disk-combination.html

John and Cathie Heslinga 1974 Canyonlands 260 455, Manny tranny and 1 ton, 3:70 LS, Red Seal Journeyman, DTE, BEd. MEd. Edmonton, Alberta

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