Home » Public Forums » GMCnet » Do I Have a Rostra Cruise Contrl?
| Do I Have a Rostra Cruise Contrl? [message #186408] |
Thu, 04 October 2012 15:10  |
SThornbg
Messages: 127
Registered: September 2011
Karma: 0
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My cruise control has quit working. Reading notes here I have found reference to the Rostra CC and I think that is what I have.
I have identified the signal generator between the spedo cable parts and I have a chain/cable running from the carb to a "black box" that is mounted to the floor under the driver's seat. The cable goes into the center of a large round cover - approximately 4" diameter which is mounted to a box that looks to be approximately 3" square (I don't know how deep. There appears to be a vacuum line going inot the back of that box.
The steering column stalk looks like the first one shown on the Rostra site, which they refer to as GMC original, pre 1981.
Does this appear to be a Rostra unit? If so, any help on what model number? Hopefully I can look up their installation manual for a bit of trouble shooting.
Thanks for any help.
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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| Re: Do I Have a Rostra Cruise Contrl? [message #186423 is a reply to message #186416] |
Thu, 04 October 2012 20:31  |
SThornbg
Messages: 127
Registered: September 2011
Karma: 0
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The control box / actuator box is black. I cannot see any printing on the box, but the signal generator has a number 590-02392-1 and it says 8 Pulses per Rev.
I hope this is some help to identify my system.
Steve
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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| Re: Do I Have a Rostra Cruise Contrl? [message #186566 is a reply to message #186416] |
Sat, 06 October 2012 22:04 |
SThornbg
Messages: 127
Registered: September 2011
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Thanks Matt, but unless the Dana CC uses a vacuum input, it is not what I have.
I see only two main pieces in my system - the pulse generator installed in the speedo cable and the servo box. The twisted wire pair from the pulse generator goes to the back of the servo box, a wire bundle in flex conduit comes out of the back of the servo and runs to somewhere in the front of the engine compartment - I assume to the control stalk, fuse box, etc.. And there is a vacuum hose that runs from the intake manifold to the back of the servo box. Then of course, the cable runs from the servo box to the throttle crank.
The system worked when I bought the coach just over a year ago. I have not had much occasion to use CC but when I tried it shortly before our Amana trip it did not work. The fuse in the glove box is sound and shows power with the ignition on. Both brake light filiments are sound.
Before I spend a lot of time chasing spooks, I need to find the cost and availability of the Rostra system that fits our coaches.
Thanks for any suggestions.
Steve Thornburg
South Bend, IN
77 exPB, 455, "Tinker Toy"
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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| Re: [GMCnet] Do I Have a Rostra Cruise Contrl? [message #186577 is a reply to message #186566] |
Sun, 07 October 2012 02:30 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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Manny took my cruise control off when he did my trans - new one, i am glad for the older ones stick and it is a run away train.
i just saw that on hbo and i do not want that, I just use my toe, with this amount of weight, it is best to stay on your toes.
I read somewhere here a little chain sticks and it won't stop unless you turn your key off and then no brakes.
what a great block of dominos that is. I am glad he took mine off, sure as heck it would happen to me. thanks again manny !
mickey
77 palm beach
anaheim ca.
i am so very moved to read Matt's greetings to newbies - persons with such class. thank you,
may god bless you for your great kindness, gracious, and propitiousness of thought "Matt Cole".
It means so much to all newbies like me, when they start this place to see your greeting.
your a class act. thank you for your greetings. It would make a good bumper sticker as well. with matt's name at the end.
Matt if you make them i want to buy one. I know now this is over the top on it, but i would. Mick.
On Oct 6, 2012, at 8:04 PM, SThornbg wrote:
>
>
> Thanks Matt, but unless the Dana CC uses a vacuum input, it is not what I have.
>
> I see only two main pieces in my system - the pulse generator installed in the speedo cable and the servo box. The twisted wire pair from the pulse generator goes to the back of the servo box, a wire bundle in flex conduit comes out of the back of the servo and runs to somewhere in the front of the engine compartment - I assume to the control stalk, fuse box, etc.. And there is a vacuum hose that runs from the intake manifold to the back of the servo box. Then of course, the cable runs from the servo box to the throttle crank.
>
> The system worked when I bought the coach just over a year ago. I have not had much occasion to use CC but when I tried it shortly before our Amana trip it did not work. The fuse in the glove box is sound and shows power with the ignition on. Both brake light filiments are sound.
>
> Before I spend a lot of time chasing spooks, I need to find the cost and availability of the Rostra system that fits our coaches.
>
> Thanks for any suggestions.
>
> Steve Thornburg
> South Bend, IN
> 77 exPB, 455, "Tinker Toy"
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Do I Have a Rostra Cruise Contrl? [message #186596 is a reply to message #186577] |
Sun, 07 October 2012 11:15 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Mickey,
The chain issue you refer to is is the result of a missing part. The chain runs through a tube and if that tube is missing, the chain can get hung up on some of the manifold bracketry, and stick, as you say. If the system is installed properly, with all it's components in place, it will not do that.
Where you live, you are better off not using the cruise control in that heavy traffic, but if you are out on the open highway, you will wish you had it.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Do I Have a Rostra Cruise Contrl? [message #186605 is a reply to message #186596] |
Sun, 07 October 2012 12:50 |
mickeysss
Messages: 1476
Registered: January 2012
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thank you, good luck, :-)
mickey on his toes.
palm beach 77
anaheim ca/
better for gas milage, as well on flat and long distance runs.
On Oct 7, 2012, at 9:15 AM, Carl Stouffer wrote:
>
>
> Mickey,
>
> The chain issue you refer to is is the result of a missing part. The chain runs through a tube and if that tube is missing, the chain can get hung up on some of the manifold bracketry, and stick, as you say. If the system is installed properly, with all it's components in place, it will not do that.
>
> Where you live, you are better off not using the cruise control in that heavy traffic, but if you are out on the open highway, you will wish you had it.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Do I Have a Rostra Cruise Contrl? [message #186615 is a reply to message #186596] |
Sun, 07 October 2012 15:14 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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My (original style JimK rebuilt) cruise contro is the best thing that ever happened to I 85!
--johnny
'76 23' transmode norris
'76 palm beach
From: Carl Stouffer <carljr3b@yahoo.com>
To: gmclist@temp.gmcnet.org
Sent: Sunday, October 7, 2012 12:15 PM
Subject: Re: [GMCnet] Do I Have a Rostra Cruise Contrl?
Mickey,
The chain issue you refer to is is the result of a missing part. The chain runs through a tube and if that tube is missing, the chain can get hung up on some of the manifold bracketry, and stick, as you say. If the system is installed properly, with all it's components in place, it will not do that.
Where you live, you are better off not using the cruise control in that heavy traffic, but if you are out on the open highway, you will wish you had it.
--
Carl S.
'75 ex Palm Beach
Tucson, AZ.
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Do I Have a Rostra Cruise Contrl? [message #186636 is a reply to message #186615] |
Sun, 07 October 2012 18:54 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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These albums describe the installation of the Electromotor (stepper motor)
cruise control from '90's GM vehicles. IMHO that's a much cheaper and
probably better CC than the Rosta or any other option. Mine works great!
http://www.gmcmhphotos.com/photos/g4649-gm-stepper-motor-cruise-control.html
(Disregard 'Druber's reference to the VSS he used -- he no longer sells
them)
http://www.gmcmhphotos.com/photos/g4776-cruise-control-ac-delphi-electro-motor.html
After those two did such a good job, I didn't write up my installation, but
I did publish the wiring diagram:
http://www.gmcmhphotos.com/photos/g4763-delphi-electromotor-cruise-control-diagrams.html
Not posted, but available to anyone who needs it, is the diagram for a
divide by 2 or 4 board I made to enable one to use a higher frequency VSS
than the 4000 ppm the CC requires.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Sun, Oct 7, 2012 at 4:14 PM, Johnny Bridges wrote:
> My (original style JimK rebuilt) cruise contro is the best thing that ever
> happened to I 85!
>
> --johnny
> '76 23' transmode norris
> '76 palm beach
>
> From: Carl Stouffer
> To: gmclist@temp.gmcnet.org
> Sent: Sunday, October 7, 2012 12:15 PM
> Subject: Re: [GMCnet] Do I Have a Rostra Cruise Contrl?
>
> ...
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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