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How To Identify Correct Transmission Modulator

289Galaxie

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After spending so much quality time under my car lately, I noticed that the transmission vacuum control modulator is leaking around the crimp. How do I identify which one I need as there is no stripe visible and all the suppliers have different ones depending on the color of the stripe, ie. black, green, white, etc.. My car is a '67 Galaxie 500 with a light duty FX transmission. The modulator that's currently in the car is a screw-in type with one port. Thanks in advance for any help you can give.  

That's very unusual for the modulator to leak at the crimp. Usually the diaphragm ruptures and the engine vacuum sucks tranny oil into the engine. Are you positive it's the crimp leaking? Should be a blue stripe modulator. Hopefully the vendor has an adjustable one with the adjusting screw in the vac nipple. Make sure you get the correct one for your FX trans. The screw-in early C4 and C6 are different and are commonly white stripe.  

I assumed it's leaking at the crimp because there's tranny fluid around it, but I didn't clean it off to see if it reappears. I should probably clean it up and then have another look. Unfortunately, I can't find any listings for a modulator for an FX specifically. I figured I'd have to go with a C4 modulator because they and C6's are the only ones listed. Just wanted to be sure that if I got one for a C4 it would match the characteristics of the one I have now, but was unsure of how the stripe differences affected performance, if at all.  

Stripe color indicates spring tension and/or diaphragm diameter. *generally* Large diaphragm = Large engine ie: Big block Small diaphragm = Small engine ie: Small block There are exceptions to this.... A C4 or C6 screw-in type modulator will physically fit your trans but may not work correctly. Most likely will shift very late. The FX modulator is sometimes hard to find but they are out there. I work in a trans repair shop and our parts supplier can get those FX mods, but they don't sell to the public. Maybe there is a trans shop local to you that can get it? Some info on this page... Transmission Modulator Application Listings by Rostra Transmission  

Thanks for the link. I didn't see a listing for an FX but I did find FMX FordoMatic. The FX according to my literature is a Cruise-O-Matic so maybe I'm getting close. As far as helpful shops around here I don't think there are any. There used to be one that rebuilt old transmissions and had a great reputation but the owner retired and now his son runs the business. Seems they only handle newer stuff now. I did find some numbers stamped on mine which read: 00094 or 000944 Made In USA. Mean anything to anyone?  

RAGGAREN

here... https://www.ebay.com/itm/Rostra-511...ash=item1a26ca3f02:g:SdMAAOSwXYtYttTN&vxp=mtr  

Yup, that's the one.  

Thanks a lot for the help Galaxiex and Raggaren. I just ordered the one you found on ebay Raggaren, so hopefully I'll have it before the weekend. Again, thanks for the help!  

I ordered my modulator from RockAuto when I rebuilt my Cruise-O-Matic. Airtex Part Number 7R1030 Is has one blue stripe on it. https://www.rockauto.com/en/moreinfo.php?pk=1186104&cc=1435750&jsn=14  

I ordered one from eBay which arrived a couple of days ago. It's supposed to be a Rostra but whether it is or not I have no idea as it came in a plain white box with a generic label. I was concerned that the label states 2 SPD but the seller says it's correct for both 2 and 3 speed transmissions. No markings on the modulator either, except for the number that appears to be 18018. Looks similar to yours, though.  

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Brass Auto part Metal

The blue stripe modulator is correct for the FX/FMX. They are all made by a single supplier and reboxed for other sellers ( Napa , etc) so the stripe color is the common identifier. C4s are typically white and C6s green by my personal experience.  

Thanks for the replies. Once I sort out the axle venting issue I'm having I'll get back to the modulator. Unfortunately for me my mechanic has been too busy to get me in to sort out the vent problem, so I'm just putting this on hold for now. Good to know that this is the correct one. Thanks!  

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  • 1955 - 1966 Classic Ford Thunderbird

1964 Cruise-O-Matic transmission adjustment

  • Thread starter 64ZCODE
  • Start date Oct 17, 2018

64ZCODE

Active Member

  • Oct 17, 2018

Hi all. I have a '64 but this may apply to other years using the cruise-o-matic transmission. My transmission was shifting fine but the kick down was not working. Also, the shift points were at set speeds, in other words pressing on the gas would not result in the car staying in a gear longer before shifting to the next higher gear. Long story short, I followed the procedure in the shop manual and set the accelerator pedal height to 4 3/8", and then set the downshift lever rod clearance to 1 1/4". The car now downshifts and stays in gear longer when under load. Kick down is important of course but there are diminishing returns as the motor revs faster. Stock 390s develop max torque around 3000 rpm and it falls off quickly after that, so depending on the speed of the car, it would be much better power wise to just stay in 3rd gear with the secondaries open than to downshift into second for not much benefit. I'll play a little bit with the downshift lever rod clearance to try to dial this in a bit better. Observations and ideas on this would be much appreciated. Also, I understand that at speeds over 25mph, if you shift the selector into first gear position, then the car will stay in second gear until speeds slows below 25mph.  

  • Oct 23, 2018

The cruise-o-matic transmission in my '64 now shifts from first to second at around 5 mph, then from second to third at around 15 mph. If I give it the gas, those shift points do occur at somewhat higher mph but it still seems low to me. Would be interested in hearing from others with the cruise-o-matic on this issue. I'm thinking that adjusting the kick down linkage might change the upshift points but have not played with that yet - what do folks think?  

Rottinrob

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  • Sep 16, 2019

Mine shifts from 1 and barley hits second gear before going to 3rd. Unless I get on it. Transmission is rebuilt. Any ideas how to adjust it?  

ak7an

  • Sep 17, 2019

You might check the vacuum modulator. This assists with shift timing. Make sure the line is in good shape, connected on both ends. It might need replaced. Cheers Ed  

OneAmongOthers

OneAmongOthers

  • Sep 19, 2019

My 1969 is the same way. Not sure if the c6 is the same as the cruise-o-matic. Recently had the transmission rebuilt and it seems the same. The shift from first to second is low. Like around 5ish mph. Then 3rd shortly after at around 15mph afterwards it will just stay in 3rd. I have to hammer down to get the trans to kick down into 2nd, but it doesn’t feel like it’s any better than plodding along in third.  

  • Sep 20, 2019
64ZCODE said: That describes exactly how the transmission in my 64 shifts.a good transmission shop could advise on whether it's possible to alter the shift points, I really don't know. Fortunately, the engine has plenty of torque at lower RPMs so it seems to love 3rd gear. Click to expand...

332-428 Ford FE Engine Forum

  • 332-428 Ford FE Engine Forum > General Discussion > 332-428 Ford FE Engine Forum >

Cruise-O-Matic question

ford cruise o matic vacuum modulator

Post May 30, 2012 #1 2012-05-30T06:18+00:00

Post May 30, 2012 #2 2012-05-30T11:28+00:00

Post May 30, 2012 #3 2012-05-30T14:23+00:00

I've adjusted the kick down rod properly first off. Tranny shifts great and is rebuilt. The tranny will not kick down over 50-55 MPH. Is this common? I approach an intersection and slow down to take a turn. I roll through the green light, turn and nail the gas. Why doesn't it kick down and take off like a Banshee? It feels like the tranny is still in high gear. Coming to a normal stop; I do feel the tranny shift down to low. 1966 F100 LWB Balanced 390 .060 over, Comp 270s, gasket matched F427 intake, headers, gasket matched/bowl blended C8AE-H heads, 2-1/2" duals, C-O-M with 3:54 gears and Tracloc.

Post May 30, 2012 #4 2012-05-30T17:06+00:00

Post May 30, 2012 #5 2012-05-30T17:11+00:00

Doesn't downshift at high speeds, doesn't downshift at medium speeds. When does it downshift? puttster

Post May 30, 2012 #6 2012-05-30T20:50+00:00

Post May 30, 2012 #7 2012-05-30T21:17+00:00

Post May 31, 2012 #8 2012-05-31T03:26+00:00

Post May 31, 2012 #9 2012-05-31T18:24+00:00

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ford cruise o matic vacuum modulator

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Thermodynamic calculations and analysis of the deoxidation of special alloys by strong deoxidizers and carbon in vacuum

  • Theory of Metallurgical Processes
  • Published: 13 October 2015
  • Volume 2015 , pages 469–473, ( 2015 )

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  • A. A. Sisev 1 ,
  • S. N. Paderin 1 &
  • K. V. Troyanov 1  

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The thermodynamic calculations of the equilibrium activities of oxygen with deoxidizers Al, Ca, Mg, Ti, La, and Ce are performed from the compositions of metal samples taken during melting of special alloys in a vacuum induction furnace. The emf was measured simultaneously with sampling during the immersion of an oxygen sensor into a liquid metal. The results of calculations of the equilibrium oxygen activities with each deoxidizer are compared to the oxygen activities calculated by the measured values of emf and the temperature metal.

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Oxygen distribution for the oxidation of metallic bath components in the oxidation period during the heat of 08Kh18N10T steel in a 20-t arc furnace

S. V. Muruev, E. V. Shil’nikov & S. N. Paderin

Theory, possibilities, and results of electrochemical measurements in deeply deoxidized melts during making of special alloys in a vacuum induction furnace

A. A. Sisev & S. N. Paderin

Electron and Mass Transfer during Solid Carbon Reduction of Metals in Solid Complex Oxides

V. E. Roshchin, A. V. Roshchin, … A. S. Bil’genov

E. T. Turkdogan, Physical Chemistry of High-Temperature Technology (Academic, New York, 1980).

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G. K. Sigworth and J. F. Elliott, “The thermodynamics of dilute liquid iron alloys,” Metal. Sci. 8 , 298–310 (1974).

D. Kondepudi and I. Prigogine, Modern Thermodynamics—From Heat Engines to Dissipative Structures (Wiley, New York, 1998).

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Original Russian Text © A.A. Sisev, S.N. Paderin, K.V. Troyanov, 2015, published in Elektrometallurgiya, 2015, No. 5, pp. 26–30.

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Sisev, A.A., Paderin, S.N. & Troyanov, K.V. Thermodynamic calculations and analysis of the deoxidation of special alloys by strong deoxidizers and carbon in vacuum. Russ. Metall. 2015 , 469–473 (2015). https://doi.org/10.1134/S0036029515060166

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Issue Date : June 2015

DOI : https://doi.org/10.1134/S0036029515060166

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IMAGES

  1. Standard Motors Vakuum Modulator. Cruise-O-Matic. Ford. 1961-72

    ford cruise o matic vacuum modulator

  2. Rostra 51-1210-36-00 Ford Cruise-O-Matic Vacuum Modulator Blue Stripe

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VIDEO

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  6. 1957 Ford

COMMENTS

  1. Cruise O Matic Problem

    1957 Ford Fairlane 500 Club Victoria 410ci Tremec TKO 600 3.50 Tru-Trac. ... Disconnect the vacuum hose off the modulator, and place a small screw driver down the hole. ... 1964 Galaxie 500XL, 352cid, Cruise-o-matic, 9in rear, white w/white interior, all original american iron as it came from the factory.

  2. How To Identify Correct Transmission Modulator

    The blue stripe modulator is correct for the FX/FMX. They are all made by a single supplier and reboxed for other sellers ( Napa , etc) so the stripe color is the common identifier. C4s are typically white and C6s green by my personal experience. Experimental Ford parts collector. Save.

  3. Cruisomatic Have A Vacuum Modulator?

    The modulator, if yours takes one, would go in the back of the main case on the passenger's side adjacent to the extension housing. The only internal difference between the Cruise-o-matic and the 3 speed Ford-o-matic is the addition of an overrunning (sprag) clutch to hold the rear planetary in 1st and a different valve body.

  4. Ford-O-Matic Not Shifting

    A ford-o-matic doesnt have a vacuum modulator that is on later model transmissions, a vacuum modulator does exactly what the throttle pressure rod is supposed to do,tells the trans when to shift properly this throttle pressure rod is what they used before they started using vacuum modulators. HERES a picture i found of the linkage (gray part ...

  5. Technical ford-o-matic to cruise-o-matic

    It also has the vacuum modulator like the FMX but not like the early cruise-o, the early ones did not. The early C-O-M used the "detent" style throttle valve linkage just like the Ford-o-Matic and the FMX had the smooth opperating "kick down" linkage. I think that when they went to the vacuum modulator the C-O-M trans used the "kick down ...

  6. Vacuum Modulators: Oregon Performance Transmission

    Rostra 51-1210-36-00 Ford Cruise-O-Matic Vacuum Modulator Blue Stripe Single Diaphragm FMX FM FX MX. $40.65. Rostra 51-0308-02-00 GM Aluminum Powerglide Adjustable Vacuum Modulator. ... Rostra 51-0056-02-00 Ford C4 Single Diaphragm Vacuum Modulator Push In Green Stripe C-4 76-81. $36.95.

  7. Ford C4 Automatic Transmission

    In 1967, Ford phased out the Dual-Range C4 Cruise-O-Matic, going to a more conventional valvebody and shifter with a P-R-N-D-2-1 shifter pattern that was easy to use. Placing the shifter in "D ...

  8. Rostra 51-1210-36-00 Ford Cruise-O-Matic Vacuum Modulator Blue Stripe

    Rostra 51-1210-36-00 Ford Cruise-O-Matic Vacuum Modulator Blue Stripe Single Diaphragm FMX FM FX MX OPT Product Code: NTP-6830B. $40.65. 6 In Stock . Write a Review. No reviews yet. You May Also Like. Transgo Ford FMX Shift Kit Automatic Transmission SK-3-67 1967-1973. $53.21.

  9. Transgo SK-3VL Cruise-O-Matic Shift Kit With Vacuum Modulator Cast Iron

    Transgo SK3VL Cast Iron 3 Speed Shift Kit With Vacuum Modulator Automatic Transmission 1963-1966. "With Vacuum Modulator", Cruise-O-Matic, Cast Iron Ford, "Except Lincoln Type". Includes: Cushioned Reverse Engagement Kit. Shift Correction Package & Compensator Valve Repair Kit. FMX, FM, FX, MX, Ford-O-Matic, Cruise-O-Matic, Merc-O-Matic

  10. 1964 Cruise-O-Matic transmission adjustment

    1964. Oct 23, 2018. #2. The cruise-o-matic transmission in my '64 now shifts from first to second at around 5 mph, then from second to third at around 15 mph. If I give it the gas, those shift points do occur at somewhat higher mph but it still seems low to me. Would be interested in hearing from others with the cruise-o-matic on this issue.

  11. CruiseOmatic vacuum modulator seal

    C1AP7B426A .. Vacuum Modulator Valve Gasket / Obsolete. MILLER OBSOLETE PARTS in Binghamton NY has TWO = 800-546-7278. GREEN SALES CO. in Cincinnati OH has 27 = 800-543-4959. KLIMESH MOTOR SALES in Calmar IA has 45 = 563-562-3241. Ford is in-famous for replacing 10's of 1000's of part numbers every year.

  12. Cruise-o-matic help needed.

    Yes there are vacuum modulators on cruise-o-matics. If you don't have a vacuum modulator on your auto-trans, it's possible that you have a Ford-o-matic instead, and they have a throttle valve. My vintage 1963 Motors Auto Repair Manual says: "1-2, 2-3 Shift points Low, High or Erratic: 1. Fluid level.

  13. Cruise-O-Matic question

    1966 F100 LWB. Balanced 390 .060 over, Comp 270s, gasket matched F427 intake, headers, gasket matched/bowl blended C8AE-H heads, 2-1/2" duals, C-O-M with 3:54 gears and Tracloc. recheck the t.v. rod adjustment and make sure the vac. mod. supply line is clear and unobstructed as it also influences the kick down circuit.

  14. Understand Automatic Transmissions, Mustang C4, C6, and FMX

    The C4 Cruise-O-Matic, assembled at Ford's Sharonville, Ohio, transmission plant, entered service in 1964 as a Ford designed and built three-speed automatic to replace the dated MX and FX Ford-O ...

  15. Ford Thunderbird Shift Modulator Valve, Cruise-O-Matic, 1961-66

    Ford Thunderbird Shift Modulator Valve, Cruise-O-Matic, 1961-66. $44.99 ea. NEW ARRIVING SOON Estimated Ship Date 02/14/2024 (If Ordered Today) Model: 3080223. 0 reviews Write a Review Add to Wish List.

  16. PDF Stabilization of The Amplitude of Klystron Modulator Output Pulses at

    There the power supply Eo represents the stable rectifier, resistor R includes the output resistance of the power supply and ohm resistance of the charging choke L, C-capacitance of the PFN. According to [1], a steady-state charging process can be described as follows: u(t)= Eo [1−e −ωt/2Q(Cos ωt−m i Sin ωt)]; i(t)= Eo/ρ [e −ωt/2Q ...

  17. Thermodynamic calculations and analysis of the deoxidation ...

    The thermodynamic calculations of the equilibrium activities of oxygen with deoxidizers Al, Ca, Mg, Ti, La, and Ce are performed from the compositions of metal samples taken during melting of special alloys in a vacuum induction furnace. The emf was measured simultaneously with sampling during the immersion of an oxygen sensor into a liquid metal. The results of calculations of the equilibrium ...

  18. PRX » Series » O'Toole from Moscow

    That's the fun that Rod Serling (pre-"The Twilight Zone") stirs up in his teleplay, "O'Toole from Moscow." It aired only once, in 1955, and the script was thought lost, but our John Kiesewetter found it, and with the permission of Serling's daughter, adapted it into a radio play coming to 91.7 WVXU and 88.5 WMUB on Wednesday evening.

  19. Creating a Model of Voltage Control in Vacuum Arc Furnace. Report 1

    The basis of the proposed model of voltage control in the vacuum arc furnace was based on the voltage equations of: furnace, electrode gap, displacement of rod-electrode to electrode, the DC motor and the drops weight. The formation of droplets was analyzed. The schedule and system of equations describing the gradual formation of droplets was ...