carbdoc Posted August 1, 2010 Share Posted August 1, 2010 I need a good (preferably new or rebuilt) cruise control vacuum servo for our 1976 Olds Cutlass Salon with 350 Olds (R-code) engine. It might also be helpful to know with which other GM cars this piece interchanges. The rubber diaphragm is deteriorating and I can't imagine that any servo which has been around for 35 years old + or - would be in much better condition unless NOS. Does anyone rebuild these units?Jeff Dreibus Link to comment Share on other sites More sharing options...
Marty Roth Posted August 2, 2010 Share Posted August 2, 2010 (edited) Hi Jeff,I got a new one for my 1970 Caddy at Autozone.I was even able to order it at AutoZone.com | Get In The Zone! and to pick it up at my local store .Just click on the above link.Very affordable, too !Best regards,Marty Edited August 2, 2010 by Marty Roth typo (see edit history) Link to comment Share on other sites More sharing options...
carbdoc Posted August 3, 2010 Author Share Posted August 3, 2010 Marty,Thanks for the tip. I tried the AutoZone link you provided -- they listed everything BUT the cruise servo. Rats!You don't happen to know the AutoZone part number your Caddy used, do you? Perhaps I could use the part number to get a look at it and see whether it appeared sufficiently similar . . . Thanks!Jeff Link to comment Share on other sites More sharing options...
Marty Roth Posted August 5, 2010 Share Posted August 5, 2010 Jeff,Sorry, but I will not be able to get to the Caddy for the next 3 weeks. I'll try to get the info for you, but you might try some of the guys on this site. Rockettrader (?) seems well-informed. Link to comment Share on other sites More sharing options...
Marty Roth Posted August 6, 2010 Share Posted August 6, 2010 Jeff,You might try FEN , or one of the other sites that serve the Cadillac communityThere was a list in a recent Hemmings - very helpfulhow about NAPA ?also, try a posting on the BUICK POST WAR site (above)wish I could be more helpful, but am on the road to Taos for the Chrome Glidden Tour Link to comment Share on other sites More sharing options...
old-tank Posted September 28, 2010 Share Posted September 28, 2010 Any updates on a source? My 76 Royale needs one too. Even the patches have patches...Willie Link to comment Share on other sites More sharing options...
Guest Jim_Edwards Posted September 28, 2010 Share Posted September 28, 2010 (edited) Just read this thread and maybe I can help you guys out a bit.The part in question is also often called "Cruise Control Transducer." Any new ones for '70s era GM products would be NOS as no one has produced for the exact applications since sometime in the 1990s. There is at least one re-manufacturer of these parts and it is A-1 Cardone. Now the dicey part. There were two different designs used across GM's product lines. Within the same model year either may have been used on given vehicle makes and models. So before heading to a parts store or shopping on-line you need to know if your vehicle's Cruise Control Servo/transducer has two terminals or three terminals.Both types were used between 1970 and 1980 on both gas powered cars and trucks.Remans of both types are available on-line from rockauto.com for a little less than $90.00 exchange. You can buy outright, but will pay about $20.00 more for that priveledge. The exchange route helps the next guy that might need one. If we don't exchange parts like this sooner or later there will be none to rebuild. Edited September 28, 2010 by Jim_Edwards (see edit history) Link to comment Share on other sites More sharing options...
rocketraider Posted September 29, 2010 Share Posted September 29, 2010 Jim, I think they're talking about the vacuum diaphram that operates the throttle linkage. The 1976 Oldsmobile used the old style Dana governor transducer instead of the later AC vacuum transducer.IMHO the Dana setup is far superior to the AC transducer. It just couldn't be adapted to resume features, which Ford had raised the bar with. Link to comment Share on other sites More sharing options...
Guest Jim_Edwards Posted September 29, 2010 Share Posted September 29, 2010 Jim, I think they're talking about the vacuum diaphram that operates the throttle linkage. The 1976 Oldsmobile used the old style Dana governor transducer instead of the later AC vacuum transducer.IMHO the Dana setup is far superior to the AC transducer. It just couldn't be adapted to resume features, which Ford had raised the bar with.I would agree the Dana setup was/is overall a better answer to cruise control. In all the years I've had vehicles with the resume feature I could probably count the times I've used that feature without having to resort to including my toes in the counting process.For everyone's edification, Dana sold its cruise control group/division to Rostra in 1991. Whether they are manufacturing repair parts for the old Dana units I do not know. Their web site is at Rostra Precision Controls, Inc.I will also point out that I'm not any sort or expert on Mid '70s Olds vehicles; if it ain't got a 317-394 in it I don't want it (grin). However, the below is application data for the AC type transducer.2 Terminal Type:<table id="tbllib" class="order" style="display: block; border-collapse: collapse;" border="0" cellspacing="1" width="100%"><tbody><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1978</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">98</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/2 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1977-1970</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">98</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1980</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/2 Terminals Gas</td></tr><tr><td bgcolor="#ffffff" width="25%">1979-1979</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">Gas w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1978-1970</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1980-1980</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass Supreme</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/2 Terminals Gas</td></tr><tr><td bgcolor="#eeeeee" width="25%">1979-1979</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass Supreme</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/2 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1978-1971</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass Supreme</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1978</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Delta 88</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/2 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1977-1970</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Delta 88</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1974</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Omega</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/2 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1980-1979</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Toronado</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">Gas w/2 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1973-1970</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Toronado</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%"></td></tr></tbody></table>Three Terminal Type:<table id="tbllib" class="order" style="display: block; border-collapse: collapse;" border="0" cellspacing="1" width="100%"><tbody><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1978</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">98</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/3 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1977-1970</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">98</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1980</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/3 Terminals Gas</td></tr><tr><td bgcolor="#ffffff" width="25%">1979-1979</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">Gas w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1978-1970</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1980-1980</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass Supreme</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/3 Terminals Gas</td></tr><tr><td bgcolor="#eeeeee" width="25%">1979-1979</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Cutlass Supreme</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/3 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1978-1971</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Cutlass Supreme</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1978</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Delta 88</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">Gas w/3 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1977-1970</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Delta 88</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1980-1974</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Omega</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#eeeeee" width="75%">w/3 Terminals</td></tr><tr><td bgcolor="#ffffff" width="25%">1980-1979</td><td bgcolor="#ffffff" width="25%">Oldsmobile</td><td bgcolor="#ffffff" width="25%">Toronado</td><td bgcolor="#ffffff" width="25%">All</td></tr><tr><td bgcolor="#ffffff" valign="top" width="25%">Application Data:</td><td colspan="3" bgcolor="#ffffff" width="75%">Gas w/3 Terminals</td></tr><tr><td bgcolor="#eeeeee" width="25%">1973-1970</td><td bgcolor="#eeeeee" width="25%">Oldsmobile</td><td bgcolor="#eeeeee" width="25%">Toronado</td><td bgcolor="#eeeeee" width="25%">All</td></tr><tr><td bgcolor="#eeeeee" valign="top" width="25%"></td><td colspan="3" bgcolor="#eeeeee" width="75%"></td></tr></tbody></table> Link to comment Share on other sites More sharing options...
Guest scott scofield Posted March 16, 2012 Share Posted March 16, 2012 I need one for my 77 olds also. Link to comment Share on other sites More sharing options...
Guest Clyd Posted October 23, 2012 Share Posted October 23, 2012 This may be to late to help, But I have found a way to replace the rubber diaphragm on the cruse servo on my customers 76 Tornado. If anyone is interested let me know. Link to comment Share on other sites More sharing options...
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