VSS, Vehicle Speed Sensor used with MAF computer controlled EFI engines...

Well my question is this:

Do i need VSS for my 2.9l conversion (into a 85 ranger with c5, used to have 2.8l). The trusk will be my summer daily driver amd offroad rig. I could truely care less about idle, that can be modified with a hand throttle, allong with MPG, work pays for most of my gas.

All i want is best preformance in its stock class... w/o the vss...

what to do?

Should i just go get a XFR case with the VSS plug, and mod my current xfr case for a doubler?

all you need to hook that up is a speedo cable off a 86 or newer
it plugs into the speedo cable by the transfer case :D

and they break real easy so be carefull :rolleyes:

Cool, thanx, i'll look into it...

What is the preformance differences w/o it?

Originally posted by alx
all you need to hook that up is a speedo cable off a 86 or newer
it plugs into the speedo cable by the transfer case :D

and they break real easy so be carefull :rolleyes:

Among other things, the VSS raises the idle when you are coming to a stop to keep your motor from dying. With an auto, you will want it.

:D :D :D Gotta love TRS www.therangerstation.com

SECTION 3. Speed Sensor Installation and wiring. This step may or may not be required, depending on your vehicle. Time, about 2-3 hours. Pretty Easy. Only those without a speed sensor (and associated existing hook ups to pins 3 & 6 in the 60 pin computer wiring harness) need to perform the work in this section. The speed sensor is located where the speedo cable goes into the transmission or transfer case. The speedo cable plugs into it, and the Speed Sensor goes into the transfercase. Two wires come off it.
3.1 1986 2.9L's need a Speed Sensor, which is then, wired to pins 3 & 6. This is a simple item which plugs-in where the speedo goes into the trans (or transfer case if you have a 4x4 like me).
3.2 What you need: Ford part # E3AZ-9E731-A, list price $25.13 (part # is the one for a manual trans without cruise control). And you need electrical connector pigtail #E4AB-14489-AA, $9.88 (also called 6790 Coil P): There are a number of different types of speed sensors. Ford can help you get the right one. There are after-market ones as well, which come with both the sensor and connector for about $35.
3.3 Note: The speed sensor I purchased required a minor modification to get the speedo cable to plug into it. I could have also bought a new speedometer cable, which plugs in correctly. But I decided to modify it. The speedo cable extension area was 11mm diameter and the hole it had to go into in the speed sensor was 10mm. I just drilled it out with an electric drill (7/16 drill bit), and it worked just dandy. Note: I re-ground the drill end to about 10 degree angle to prevent the drill point from drilling into the internal mechanism.
3.4 Remove speedometer cable from the transmission. Remove the speedo gear and install on the end of the speed sensor.
3.5 Plug the speed sensor into trans, and re-connect speedo cable.
3.6 Plug in the wire connector and then route the wires along the speedo cable all the way up to the firewall. Fish wires through firewall where the speedo cable goes through, and then over the trans hump to the processor area. It's a good idea to wrap wires with flex tube loom in the area under the car. You will need 6' of 3/8" flex tube and 5-6 cable ties to secure the flex tube to the speedo cable. NOTE: MOST 2.9L's will not need the speed sensor as they already have one.