Wiring for Speedometer help!!

[Kros383SS]

How do i hook up my speedometer to my 4l80e.
truck was originally a 350/700r4 and the DRAC is built into the cluster.

Do i use the output from the nelson harnees or hook up my factory VSS wires to the rear 4l80 speed sensor.
also i need an input for cruise and RWAL. and i read somewhere they all take diffrent pulse per mile.

i hope someone understands this or has done this on there OBS engine/trans swap.

[xXxSilveradoxXx]

I'm wondering the same thing..... c'mon, somebody post up!

[NITROUS]

Hook the VSS up using the Nelson harness and then hook the wire from the gausges to the C2 red connector Pin 50 dk green and white stripe 4000 4K and that should fix the speedo. What year model is your truck, this is for 96-2000

[NITROUS]

Ah hell, I just read 89 but it's probably close. I can tell you tomorrow though unless someone beats me to it.

[Kros383SS]

The thing is my VSS has 2 wires going to the stock cluster and the nelson harness has one wire. Thats my dilemma

I'd like to have the speedo wired up before I drive it, but we'll c!!

[Wtfan18]

Ah hell, I just read 89 but it's probably close. I can tell you tomorrow though unless someone beats me to it.

well that worked on my 98 lance who knows with the 89s haha

[NITROUS]

Just hook the one wire up (Green) to the pin I mentioned above and you'll be ok, the other wire is another VSS signal for cruise, the radio or something else.

[xXxSilveradoxXx]

Our problem is that the DRAC/VSS buffer is built into our cluster.

[Kros383SS]

Just hook the one wire up (Green) to the pin I mentioned above and you'll be ok, the other wire is another VSS signal for cruise, the radio or something else.

I'll try it, but Im almost positive it wont work. I have the moonie gauges and they have the drac built in it. It has the two wires from the original 700r4 speed sensor that goes directly to the cluster then comes out of the cluster and goes to the comp., cruise.
I called nelson performance and basically they r guessing too. and said to try and hook there one wire to one of the two wires and try it. If it doesnt work try the second wire.
So I'll try urs and his suggestions and go from there.

Our problem is that the DRAC/VSS buffer is built into our cluster.

Thats what im saying! And I dont think anyone has done this swap with our instrument cluster.

[NITROUS]

It won't work, hang tight and I'll figure out what you need to do and post it here. If I remember correctly you have the oddball cluster where you can't change out the faces. The needles really aren't needles but are somewhat wide right?