'78 K10 Cruise Transducer

[RyanAK]

Brought the truck out of town for work the last two weeks for a little shake down... and because I'm bored to tears in the hotel after work and thought I'd do some small projects in the parking lot.

Other than the vibrations I'm chasing at 45-55 and 65-70 mph, the truck is pretty darn comfortable and seems reliable.

Rig is a '78 K10 Suburban Silverado with a GM Crate 350, TH350/NP203, 3.73 gears.

This week my little project was to replace the one-piece speedo cable (which was working perfectly...) to the two-part so I could run through the cruise transducer. 160 miles of interstate each way would be so much nicer with cruise, and everything seems as if it's in place and hooked up. Wires, vacuum lines, etc. I assumed the guy that dropped in the crate motor just bypassed the transducer because it takes a little effort to figure out which cables are needed. I found the cables and install should be easy-peasy. 15 mins and I had the new cables from the transfer case to the transducer and from the transducer in to the speedo. After 5 feet of test drive... BOING! Cable snapped at the transfer case. Apparently the transducer is seized or almost seized up. The speedo DID move for the 3 seconds before I pretzled the lower cable. Anyone know if these Speed Master transducers can be freed up? I'm finding it tough to source a reman'd unit.

This afternoon I'll put the old cable back for the drive home. Thought I'd be cruising in style with GM OE cruise. Nope.

Good grief. Old trucks.

R