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1972 998 trans speedo

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matty 401 View Drop Down
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    Posted: Jun/09/2023 at 3:53pm
I have a 998 trans in my 72 Matador on the speedo  there is a box that screws into the speedo output  and the speedo cable screws onto it  what is it for  do not have cruise control some kind of reducer ? 
72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 406
93 Cherokee 4.0 5 speed

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1970390amx Quote  Post ReplyReply Direct Link To This Post Posted: Jun/09/2023 at 5:38pm
picture?
1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box
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matty 401 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote matty 401 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/11/2023 at 6:55pm
nope no pictures   does have a wire coming off it  but no idea where  it goes 
72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 406
93 Cherokee 4.0 5 speed

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/11/2023 at 7:20pm
Remnant of TCS?
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Post Options Post Options   Thanks (1) Thanks(1)   Quote FSJunkie Quote  Post ReplyReply Direct Link To This Post Posted: Jun/12/2023 at 12:54am
It is a speed switch for the Transmission Controlled Spark system. 

The switch grounds a vacuum solenoid mounted to the intake manifold near the heater hose barb that blocks vacuum to the distributor advance diaphragm when the vehicle speed is below about 30 miles per hour. 

A harmless and effective system for reducing tailpipe emissions, but unessential for the functioning of the vehicle. 
1955 Packard
1966 Marlin
1972 Wagoneer
1973 Ambassador
1977 Hornet
1982 Concord D/L
1984 Eagle Limited
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Post Options Post Options   Thanks (0) Thanks(0)   Quote matty 401 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/12/2023 at 9:11am
thanks 
72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 406
93 Cherokee 4.0 5 speed

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