79 cruise control question
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
79 cruise control question
Soon as I get the speedo needle bounce issue addressed I want to move on to hooking up my cruise to see if it works. I ordered a cruise servo rod from ecklers, it's about 6 in long, has a looped end on one side which I assume hooks up to the servo. The other end is threaded and is a few inches short of reaching the stud on the carb linkage. Does anybody know what type of pice goes there, or maybe have a photo or diagram? Is it a rod, cable or what and most important where can I get it??
Thx, ESU in NY
Please Remember 9-11 and support our troops ovreseas!
Thx, ESU in NY
Please Remember 9-11 and support our troops ovreseas!
Melting Slicks
Joined: Oct 2000
Posts: 2,142
Likes: 195
From: Englewood FL
The speedometer needle bounce may be due to the cruise control
servo binding. To test, disconnect both cables from it and turn one of
threaded ends (shaft) that the cables were connected to.
You should be able to spin the shaft with little resistance. If there is
binding or the shaft is hard to turn then the cruise control servo is
defective. Rebuilt units are availble from Napa or Advance Auto Parts
(their web site) as well as the corvette parts vendors.
servo binding. To test, disconnect both cables from it and turn one of
threaded ends (shaft) that the cables were connected to.
You should be able to spin the shaft with little resistance. If there is
binding or the shaft is hard to turn then the cruise control servo is
defective. Rebuilt units are availble from Napa or Advance Auto Parts
(their web site) as well as the corvette parts vendors.
Burning Brakes
Joined: Jul 2000
Posts: 1,045
Likes: 3
The rod should be to pieces. the one you have is the rear one that goes to the serve. The front part has a eyelet at one end and threads that hook to the part you have. The eyelet mounts to a stug on the drivers throttle linkage...
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by toyvet1
The rod should be to pieces. the one you have is the rear one that goes to the serve. The front part has a eyelet at one end and threads that hook to the part you have. The eyelet mounts to a stug on the drivers throttle linkage...
Thx, ESU
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Originally Posted by toyvet1
The rod should be to pieces. the one you have is the rear one that goes to the serve. The front part has a eyelet at one end and threads that hook to the part you have. The eyelet mounts to a stug on the drivers throttle linkage...
and sorry that I didn't post the promised pics (batteries dead in camera). I had to fabricate the stud that mounts on the carb using a 1" bolt and three nuts. I used stainless and turned out not too bad (too bubba). I looked thru the Zip catalog and couldn't find anything. Probably best bet is a junk yard.
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Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
sorry I didn't get these posted sooner. Hope they help. My car is a 79 too, but my cruise doesn't work atm. the cruismaster is toast. I took it apart and that disk is rubbing against the housing like either the shaft or bushing is worn out. My speedo still works, but bounces at certain speeds.
Race Director
Joined: Oct 2000
Posts: 17,102
Likes: 7
From: Fair Oaks, OK
Originally Posted by mark79,80
The speedometer needle bounce may be due to the cruise control
servo binding. To test, disconnect both cables from it and turn one of
threaded ends (shaft) that the cables were connected to.
You should be able to spin the shaft with little resistance. If there is
binding or the shaft is hard to turn then the cruise control servo is
defective. Rebuilt units are availble from Napa or Advance Auto Parts
(their web site) as well as the corvette parts vendors.
servo binding. To test, disconnect both cables from it and turn one of
threaded ends (shaft) that the cables were connected to.
You should be able to spin the shaft with little resistance. If there is
binding or the shaft is hard to turn then the cruise control servo is
defective. Rebuilt units are availble from Napa or Advance Auto Parts
(their web site) as well as the corvette parts vendors.
There are 2 different transducers for '79. One is for the cruise switch that does not have resume. The other is for the cruise switch that has resume. It is easy to tell which one you need, if you have only one button on the end of your turn signal lever you don't have the resume. If you have a large black turn signal lever with a sliding switch and a button you have resume.
The last time I went to NAPA, they could not get a new transducer for my car, and they even referenced it from the part number on the transducer. However, you can get rebuilt transducers from the vette parts vendors.
You can also take your transducer apart and try to clean it up. I tore mine apart and sprayed chemtool in it, dryed it out, and then sprayed grease in it and slapped it back together and on the car. My cruise works perfectly now, and it didn't work in 1982 when the car was parked for 18 years.
