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Speed Sensors on A518's #56925 04/21/08 05:49 PM 04/21/08 05:49 PM
Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl... IMGTX OP I Live Here
IMGTX OP I Live Here Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl...	I am currently swapping an 5.9 magnum & A518 into my car. I am keeping the factory EFI, Computer etc. My current hitch is the speed Sensor. The OEM one in 94 was a 3 wire unit with no provisions for a speedometer cable. I want to use the factory Speedo but need the signal for the Engine Controller. I picked up a pass through speed sensor off of a Dodge van but it only has 2 wires instead of three. Is this adaptable or do I need to look elsewhere?

Re: Speed Sensors on A518's [Re: IMGTX] #56926 04/21/08 06:06 PM 04/21/08 06:06 PM
Joined: Jan 2005 Posts: 4,404 Michigan MarkZ Worthy
MarkZ Worthy Joined: Jan 2005 Posts: 4,404 Michigan	Try a speed sensor from something earlier. I pulled my 500 out of an early Dakota that had a mechanical speedometer. The speed sensor had provisions for a cable. 1987 Fifth Avenue - 512/518/D60

Re: Speed Sensors on A518's [Re: MarkZ] #56927 04/21/08 06:33 PM 04/21/08 06:33 PM
Joined: Aug 2003 Posts: 260 arizona S stockerbill enthusiast
stockerbill enthusiast S Joined: Aug 2003 Posts: 260 arizona	Here ya go!I am doing a 6.1 with a viper 6 speed in a early b body and this unit will work with your elect drive train and a cable speedo(a little pricy but accurate!!) It is a stand alone unit to drive the cable http://www.abbott-tach.com/cablex.htm Last edited by stockerbill; 04/21/08 06:48 PM.

Re: Speed Sensors on A518's [Re: IMGTX] #56928 04/21/08 06:34 PM 04/21/08 06:34 PM
Joined: May 2004 Posts: 752 North of the Motor City DartGTDan super stock
DartGTDan super stock Joined: May 2004 Posts: 752 North of the Motor City	I believe its a choice of the mechanical cable, or the electronic speed signal. I don't think you can run the Engine Controller without the electronic speed signal.

Re: Speed Sensors on A518's [Re: MarkZ] #56929 04/21/08 06:36 PM 04/21/08 06:36 PM
Joined: Aug 2003 Posts: 260 arizona S stockerbill enthusiast
stockerbill enthusiast S Joined: Aug 2003 Posts: 260 arizona	forgot the link http://www.abbott-tach.com/cablex.htm

Re: Speed Sensors on A518's [Re: DartGTDan] #56930 04/21/08 07:31 PM 04/21/08 07:31 PM
Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl... IMGTX OP I Live Here
IMGTX OP I Live Here Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl...	Quote: I believe its a choice of the mechanical cable, or the electronic speed signal. I don't think you can run the Engine Controller without the electronic speed signal. Yeah I need the electronic signal and the mecanical cable. The device I got the other day looks like this. It's a speed sensor that connects in between the cable and the speedo gear housing. It would work except the wiring harness for the 94 has 3 wires and the speed sensor I have has two. I am hoping their is a way to adapt it. 4374278-wl2su334003.jpg (289 downloads) Last edited by IMGTX; 04/21/08 07:32 PM.

Re: Speed Sensors on A518's [Re: IMGTX] #56931 04/21/08 08:05 PM 04/21/08 08:05 PM
Joined: Jan 2003 Posts: 25,726 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,726 Rio Linda, CA	The hole in the '94 tailhousing is the same as the older cable drive, just install the cable adapter and pinion from an older unit and you will have a threaded cable adapter. The INTERNET, the MISinformation superhighway

Re: Speed Sensors on A518's [Re: John_Kunkel] #56932 04/22/08 05:55 AM 04/22/08 05:55 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	What year is the trans you are putting in ? Ron

Re: Speed Sensors on A518's [Re: John_Kunkel] #56933 04/22/08 08:13 AM 04/22/08 08:13 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: The hole in the '94 tailhousing is the same as the older cable drive, just install the cable adapter and pinion from an older unit and you will have a threaded cable adapter. since he's keeping the EFI, he needs both the VSS output AND the cable drive.... Quote: Quote: I believe its a choice of the mechanical cable, or the electronic speed signal. I don't think you can run the Engine Controller without the electronic speed signal. Yeah I need the electronic signal and the mecanical cable. The device I got the other day looks like this. It's a speed sensor that connects in between the cable and the speedo gear housing. It would work except the wiring harness for the 94 has 3 wires and the speed sensor I have has two. I am hoping their is a way to adapt it. can you get wiring harnesses and find out what each wire is used for? maybe the 3rd wire is a ground that's not needed? 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: Speed Sensors on A518's [Re: patrick] #56934 04/22/08 09:56 AM 04/22/08 09:56 AM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	My thoughts exactly. The third wire may be nothing more than a ground. For example: Oxygen sensors with three wires have one ground wire for the heating element and I presume the O2 sensor ground is through the case same as a one-wire. However, four wire O2 sensors have two ground wires, one for the heater element and one for the sensor ground. It could be the same way for the speed sensor. R.

Re: Speed Sensors on A518's [Re: dogdays] #56935 04/22/08 04:53 PM 04/22/08 04:53 PM
Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl... IMGTX OP I Live Here
IMGTX OP I Live Here Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl...	OK here is the Wiring diagram I have for the Vehicle Speed Sensor that came in the 94 Transmission I am using. It appears that it recieves a Positive 8v, a Ground(sensor return) and a signal from the VSS. Any good ideas? 4376646-wiringforVSS.JPG (8142 downloads)

Re: Speed Sensors on A518's [Re: IMGTX] #56936 04/22/08 06:25 PM 04/22/08 06:25 PM
A Anonymous Unregistered
Anonymous Unregistered A	Mopar part 4439097 is an in line sensor from say an 89 M body. You should be able to use your old pinion holder adapter into the new trans tail and put the electical piece in line. I am not sure if that sensor has a 5 volt signal but it may work. Check wiring for an 89 M body. There is also 4740088 which if for a FWD and may be what you have, I'm not sure.Hope this helps.Try not using the black with blue tracer as this is the sensor ground. Last edited by MOPARTS BOB; 04/22/08 06:29 PM.

Re: Speed Sensors on A518's [Re: IMGTX] #56937 04/23/08 08:39 AM 04/23/08 08:39 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: OK here is the Wiring diagram I have for the Vehicle Speed Sensor that came in the 94 Transmission I am using. It appears that it recieves a Positive 8v, a Ground(sensor return) and a signal from the VSS. Any good ideas? can you get your hands on a similar vintage (or TBI) dakota or van service manual? IIRC those used a cable driven speedo and VSS check that...look up a 1993 dodge dakota...it's VSS is standard motor SC108 (rockauto sells for $101) http://www.partsamerica.com/ProductDetai...179&PTSet=A a '93 dakota uses a magnum 3.9 or 5.2 engine, so it should work, you'll just need to find a wiring diagram for it. 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: Speed Sensors on A518's [Re: patrick] #56938 04/23/08 11:34 AM 04/23/08 11:34 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Go to the junkyard and grab a speed sensor from a 4cyl FWD mopar. Judging by that pic you posted, the speed sensors look to be the same. They were also a 3-wire and many of them where a pass through design to accomodate a speedo cable as well.

Re: Speed Sensors on A518's #56939 04/23/08 04:02 PM 04/23/08 04:02 PM
Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl... IMGTX OP I Live Here
IMGTX OP I Live Here Joined: Apr 2003 Posts: 12,225 Looking for a way out of Middl...	Thank you for all the info. I haven't found the solution yet but with all this info I have lots of options. If you have other suggestions let me know and I will let you know what I find to work.

Re: Speed Sensors on A518's [Re: IMGTX] #56940 05/21/10 09:55 AM 05/21/10 09:55 AM
Joined: May 2010 Posts: 2 Mays Landing, NJ K kim smith member
kim smith member K Joined: May 2010 Posts: 2 Mays Landing, NJ	Check out http://cmacable.com. I worked with them through the entire process of modifying my ATV. They have A+ customer service and an excellent line of cable and restraints. If you are looking for Mechanical Cables cma is the way to go! Last edited by kim smith; 05/26/10 12:53 PM. Kim Smith http://cmacable.com

Re: Speed Sensors on A518's [Re: kim smith] #56941 05/21/10 10:26 AM 05/21/10 10:26 AM
Joined: Sep 2005 Posts: 12,481 Chino Valley RodStRace I Live Here
RodStRace I Live Here Joined: Sep 2005 Posts: 12,481 Chino Valley	Just for reference, a 2 wire signal is probably providing a voltage with a round wave pattern (analog) and the change is often more waves with speed AND amplitude (voltage increase with speed increase.) A 3 wire sensor is probably a hall effect. This sends out a square wave (digital) with pulses. Faster is more pulses. 5995129-2wire.gif (319 downloads)

383man [Re: RodStRace] #56942 05/22/10 10:59 AM 05/22/10 10:59 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Just for reference, a 2 wire signal is probably providing a voltage with a round wave pattern (analog) and the change is often more waves with speed AND amplitude (voltage increase with speed increase.) A 3 wire sensor is probably a hall effect. This sends out a square wave (digital) with pulses. Faster is more pulses. Yes the 2 wire speed sensors send a small ac anolog voltage signal and the 3 wire sensors send a digital hall effect signal as they are hall effect sensors. The 2 wire ac sensors in the tailhousing of the 518 is not used for the speedo but it is used for the electronic govenor as it needs to know the output shaft speed to control throttle pressure. These vehicles usually use the rear diff 2 wire sensor for the abs for the speedo. The abs module sends the signal to the pcm as it is either hard wired or sent over the buss. Then it goes to the cluster. Ron Last edited by 383man; 05/22/10 11:00 AM.

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