Toploader question

[Manu Mach1]

Hi,

I'm a newbee here and happy to join the 7173 Mustang owner's community.

I bought a few month ago a 73 Mustang Grandé and start to do some repairing and maintenance on it.

I have a question about a sensor I broke while removing the gearbox, located on the top left side of it.

Is it absolutly necessary to have this Transmission-Regulated Spark (TRS system) connected? Cause I can't find any spare parts to replace it. I think this sensor is related to the emission control system.

In advance thanks for your help,

Manu

 

[OMS]

Never heard of a [TRS system)

Now I have heard of it, haven't had a car with yet.

 

[LCB1]

http://www.fordification.com/library/main.php?g2_itemId=6314

 

[Manu Mach1]

http://www.fordification.com/library/main.php?g2_itemId=6314

I saw this movie this afternoon

 

[marks73]

Well I'll be. Never heard of such.

 

[Manu Mach1]

On the Chilton book, there is a chapter about "emission controls". 12 different systems were installing in our cars.

CVS: Crankcase Ventilastion System (67, 68)

TAC: Thermactor Air System (1966)

IMCO: Improved Combustion Emission Control (1968)

DC: Deceleration Valve (1969)

DMS: Distribution Modulator System (1970)

SDV: Spark Delay Valve (71 to 73)

ERC: Exaust Gas Recirculation (73)

ESC: Electronic Spark Control (72, for States and Canada)

TRS: Transmission-Regulated Spark (system I have)

TAV: Temperature Activated Vacuum (73, 6 cylinders)

DVS: Delay Vacuum By-Pass (73)

EEC: Evaporative Emission Controls (69, California)

I didn't heard about since I broke the sensor on my gearbox. It's always nice to discover new subjects on our cars.

But unfortunatly, looks like not easy to find a new parts

 

[goodnigh]

Somewhere on this forum a member asked what the little disk was

connected to the frame by the passenger door. There you have it.

mike

 

[Manu Mach1]

Ok thanks I try to find out...

 

[Manu Mach1]

Here is a picture of a Toploader. I have the same switch. Does anyone know for what it is?

 

[c9zx]

Here is a picture of a Toploader. I have the same switch. Does anyone know for what it is?

This is from Volume 6 of the 1973 Ford shop manuals. Chuck

Sorry about the inverted image. I'm better with cars than I am with laptops and scanners.

TRS Scan 123100003.pdf

 

[midlife]

Here is a picture of a Toploader. I have the same switch. Does anyone know for what it is?

This is from Volume 6 of the 1973 Ford shop manuals. Chuck

Sorry about the inverted image. I'm better with cars than I am with laptops and scanners.

That scan must be from Australia, as it is upside down.

 

[Wolverine]

Sorry about the inverted image. I'm better with cars than I am with laptops and scanners.

I am good at scanning. But, I leave the laptops to the professionals.

 

[TheJ]

Fixed the document for you Chuck.

TRS system.pdf

 

[c9zx]

Fixed the document for you Chuck.

Thanks Jayson. Chuck

 

[Manu Mach1]

Fixed the document for you Chuck.

Thanks Jayson. Chuck

So, I wrote a mail to Mister David Kee, and he gently answered me

"The switch is for a seat belt warning light on the dash".

So now I'm totally confused.

Is that for:

-TRS system?

-Seat belt warning?

Looks like the part number of this switch was D2AR-7E449-BA

If anyone has a Ford book mentionning part numbers

 

[c9zx]

The switch indicated with the green arrow in your picture is for the seat belt sensor. The TRS switch should be on the same side of the transmission very near the front of the transmission and a bit lower than the seat belt switch. The seat belt warning light circuit has a switch in each front seat belt retractors, a switch under the passenger seat, the switch on the transmission, (part of the neutral safety switch on auto trans), the bulb, and a buzzer. Chuck

 

[Manu Mach1]

Ok so my problem is solved. I don't need this device working.

Thanks for your help[/align]

 

[c9zx]

I'm glad I could help. Chuck

 

[tangfue]

The TRS (transmission regulated spark) system is designed to eliminate vacuum (part throttle) spark advance in first and second gear. A transmission sensor (TRS switch) determines when the transmission is in first or second gear. When the transmission is in one of the lower gears the solenoid vacuum valve is closed preventing part-throttle spark vacuum from reaching the distributor diaphragm so that no part throttle spark advance results