need help IDing speedometer piece and advice

-
M

MrDuster

Well-Known Member
Joined
Jan 20, 2013
Messages
324
Reaction score
16
Location
Spring Branch
Hi folks. I took this piece out of my 71 340 Duster this morning. What does the silver cylinder with a single electrical bullet connector do? You can see where in the past the exhaust burned the speedo cable and the guys plastic-tied/siliconed it…last time I drove it I notice the needle was fluctuating with noise--as I'm putting the rebuilt tranny in soon I decided to replace the cable. When I took the plastic piece off the speedometer I broke it due to my gorilla touch….the bottom line ran under brake lines with close tolerance to the body….as the cable was going to be replaced anyway I cut it to make it come out easier. Should/can I buy an upper and lower cable and go back through the silver canister or just buy a new cable….any suggestion on where to buy the cable? Open to any/all suggestions as I have zero experience with this. Thanks!! Mark
 

Attachments

  • IMG_0514 copy.jpg
    279.7 KB · Views: 211
That's the speed sensor that worked in conjunction with the emissions "N95" package on some 71' cars.

Below is a quote from daredevil's post in here......http://www.forabodiesonly.com/mopar/archive/index.php/t-131739.html


"In 1971 the ECS & CAS systems were used in the other 49 states, while California cars went to the NOX system in addition to ECS & CAS. The NOX system includes special components for the transmission, a special camshaft with more valve overlap, and a 185 degree thermostat. There were 2 different setups available depending on manual or auto trans.

Manual trans = a switch on the trans sensed what gear the car was in. any gear below high gear made a solenoid cut off the vacuum from the carb to the distributor vacuum advance unless the temperature sensor indicated the underhood temp was less than 70 degrees.

Auto trans = similar to above, but used a speed sensing switch inline with the speedometer cable."
 
Thanks for the info…think I'll put it in a box labelled "old factory original junk" and replace the cable. Anyone have one or advice on where to buy? THANKS!! Mark
 
Thanks--I saw one on ebay, but it was going to be $60 or so w/ride. Came up with empty at Rockauto earlier, but will search again.
 
NAPA has a one piece for a '70 Duster in stock. Part number is BK6151660 and it costs a whopping 19 bucks....
 
OldmanRick said:
That's the speed sensor that worked in conjunction with the emissions "N95" package on some 71' cars.

Below is a quote from daredevil's post in here......http://www.forabodiesonly.com/mopar/archive/index.php/t-131739.html


"In 1971 the ECS & CAS systems were used in the other 49 states, while California cars went to the NOX system in addition to ECS & CAS. The NOX system includes special components for the transmission, a special camshaft with more valve overlap, and a 185 degree thermostat. There were 2 different setups available depending on manual or auto trans.

Manual trans = a switch on the trans sensed what gear the car was in. any gear below high gear made a solenoid cut off the vacuum from the carb to the distributor vacuum advance unless the temperature sensor indicated the underhood temp was less than 70 degrees.

Auto trans = similar to above, but used a speed sensing switch inline with the speedometer cable."
Click to expand...

DARN I'm glad you found this. Someone else was asking this the other day.
 
You must log in or register to reply here.
-

Back
Top