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M12 Vacuum Modulator Questions |
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70 Donohue 390 
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Joined: Jul/11/2007 Location: S. Oregon Status: Offline Points: 4338 |
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 Topic: M12 Vacuum Modulator QuestionsPosted: Feb/19/2015 at 12:42pm |
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I ordered a new modulator (small one in the photo) and I don't believe it is correct? It is identical with one in the APD Parts catalogue. I removed mine and the rod seems to be too long and it won't screw in. Is mine (the larger one in the photo) even the correct one? With so many wrong parts and applications on my 70 AMX, I'm guessing the prior owners put the wrong one in just like the wrong Master Cyl & Booster. Thanks in advance for any help.
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67 Rogue 290 Convert
70 BBO 390 5 Speed Javelin-under construction |
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BamaRogue
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Joined: Feb/09/2014 Location: Alabama Status: Offline Points: 26 |
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Posted: Feb/19/2015 at 1:14pm |
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I ran into the same issue with my M12. The longer one shown in the picture is what I have installed. I ended up testing and reusing the existing one.
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BamaRogue
'66 Rogue 343 M12 |
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AMXFSTBK390
AMC Addicted 
Joined: Oct/22/2013 Location: SF Bay Area Status: Offline Points: 3489 |
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Posted: Feb/19/2015 at 2:07pm |
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My 68 AMX M12 has the long vacuum modulator as in the picture you posted.
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Questions are powerful tools...what's in your toolbox?
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JFox
AMC Nut
Joined: Jul/05/2007 Location: Alexandria, VA Status: Offline Points: 488 |
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Posted: Feb/20/2015 at 4:30pm |
Mine too.
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68 AMX 390 Go Pack Rally Pack
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70 Donohue 390
Supporter of TheAMCForum
Joined: Jul/11/2007 Location: S. Oregon Status: Offline Points: 4338 |
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Posted: Feb/20/2015 at 4:48pm |
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Thanks guys. I'll re-install my original. The TSM has some good tips on how to adjust it.
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67 Rogue 290 Convert
70 BBO 390 5 Speed Javelin-under construction |
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tufcj
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Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4088 |
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Posted: Feb/20/2015 at 6:01pm |
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My understanding is that each modulator pictured uses a length different rod. For it to work right you need to have the correct rod for the modulator.
Bob tufcj |
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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AMXAL
AMC Nut
Joined: Feb/19/2012 Location: IL. Status: Offline Points: 324 |
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Posted: May/07/2015 at 12:42pm |
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So I have read your post reguarding the modulator issues, I have the long one also, and ordered a replacement and recived a short one in it's place, the rod is an issue, I now find that the old modulator( the long one) is bad, leaking trans fluid at vacumn port so I need to find a long one...any help locating a good one ? Any help is appreciated
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WesternRed
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Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5799 |
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Posted: May/07/2015 at 5:00pm |
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Maybe cut the rod down then you can use the short one.
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69 ambassador 390
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Joined: Nov/22/2009 Location: Peoria, AZ Status: Offline Points: 3539 |
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Posted: May/09/2015 at 10:39pm |
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There is a long style on Ebay right now.
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Steve Brown
Algonac, Mi. 69 Ambassador sst 390 84 Grand Wagoneer 69 Cougar XR7 65 Fairlaine 500XL 79 F-350 Super Camper Special |
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mramc
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Joined: Jul/12/2007 Location: United States Status: Offline Points: 3217 |
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Posted: May/10/2015 at 6:06pm |
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DON"T CUT THE RODS DOWN. There are at least two different lengths of rods. Ford used the same large modulator on latter Lincolns, from what I'm told. They should be available just got to ask for the right one. Been there , done that. LRDaum
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LRDaum
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AMXFSTBK390 wrote: