C6 Modulator - Orange Stripe? |
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texanrebel
Senior Member Joined: 13-June-2018 Location: Houston, Texas Status: Offline Points: 208 |
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Posted: 17-November-2020 at 11:14AM |
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The modulator on my 1972 Mercury with a C6 has an orange stripe and the number C 302 in orange text within the stripe. I have seen reference to orange stripe mod., but for an FMX trans. not for a C6. Anyone familiar with this one? I don't know if this is the factory original, I dropped the pan to install a new gasket due to a small leak and the fluid looks great - plus the screen is very clear. I'm guessing that it has been changed out. The rubber vacuum hose was hard as a rock, so I will replace it.
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1972 Montego GT
1977 Mercury Monarch 1988 Ford Thunderbird Turbo Coupe |
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aquartlow
Senior Member Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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FWIW< I always use a black stripe modulator for all my C6's over the years, said to give the best shift feel/firmness.
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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is it a screw in or push in style? |
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72 GT Ute
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texanrebel
Senior Member Joined: 13-June-2018 Location: Houston, Texas Status: Offline Points: 208 |
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It's a screw in - here's a picture uploads/5585/IMG_7478.pdf
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1972 Montego GT
1977 Mercury Monarch 1988 Ford Thunderbird Turbo Coupe |
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aquartlow
Senior Member Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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Not sure why they(Ebay seller?) explain that the black stripe modulator has a low shift point. Due to it's smaller diaphragm area the black stripe modulator will give a later/firmer shift. It is actually made for an engine with higher than normal vacuum due to it's diaphragm's "stiffness" and/or ability to resist or delay movement when vacuum signal is placed upon it. From Broader Performance Transmissions:C6 Black Stripe Vacuum ModulatorThis is an adjustable type vacuum modulator with a small diameter diaphragm for later and more firm shifts, or for engines with high vacuum signals.
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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72 RS 351
Senior Member Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2767 |
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Does altering the length of the modulator pin have any effect? I learned a tip for the later A4LD's in the late 90's, adding an 1/8" to the length firmed the shifts a good bit. That amounted to finding a long one and cutting/filing it to length. I used some Chrysler transmission part, and I did twice, once for a 91 Explorer, and later for a 93 Explorer.
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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
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texanrebel
Senior Member Joined: 13-June-2018 Location: Houston, Texas Status: Offline Points: 208 |
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No clue if it does, I ordered a black stripe modulator. Mine was a little sluggish so I'm sure there will be some improvement on the shifts replacing the orange mystery with a known replacement.
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1972 Montego GT
1977 Mercury Monarch 1988 Ford Thunderbird Turbo Coupe |
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72 RS 351
Senior Member Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2767 |
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I have a C6 that is newly rebuilt, but I think it's a simple stock rebuild. I will read up on what's best for the C6 to work on the VB etc. I'm used to the AOD and similar 90's automatics. This will be different to not deal with any wires, solenoids etc.
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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
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aquartlow
Senior Member Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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This thread may help explain modulator pin and pre-load for adjustment to aid in correct shift timing.
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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72 RS 351
Senior Member Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2767 |
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Thanks, I'll look over that more later when I get closer to doing the shift kit. I've barely driven this 73 once a month so far.
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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
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WerbyFord
New Member Joined: 15-November-2020 Location: Northern CA Status: Offline Points: 12 |
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Yes a longer pin will also raise the shift points, 100-200rpm for fine tuning. I make mine with cut off nails and file end smooth to shape. Even the gasket makes a little difference - a thicker gasket is like shortening the pin.
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72 RS 351
Senior Member Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2767 |
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Thanks, that's great information about the C6.
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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
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aquartlow
Senior Member Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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There is no gasket used with later C6 modulators '72-on, only an O-ring on the mod's shaft to seal it within the trans case and it doesn't add or subtract from the pin's overall length. If the pin is too long(or too much pre-load), it will "hang" an upshift during WOT hits, too short and shifts tend to be too early and/or soft. It is best to have about 11.5lbs pre-load on the modulator/pin when you install it into the transmission's case(basically when using a weight scale, you should see 11-12lbs when the pin begins to move within the vacuum modulator). Look at what I linked earlier in this thread, it explains the pre-load adjustment. Most C6 pins end up between 1.625-1.688 when having the correct pre-load. Hope this helps.
Edited by aquartlow - 20-November-2020 at 11:18AM |
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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