Does the 700r4 have a machanical speedo and vss?

[Scott26]

i dont know much about trannys.I have a 1986 700r4. Im going to buy a tbi conversion kit from affordable fuel injection. Im wondering what kind of tranny hook up i need for the kit. It looks like it has a machanical speedo cable on it or is it something else. it also has a two wire plug in on it to. where is the vss at ?
thank you if you can explain.

[Goldfinger]

my 85 is mechanized. it has a 700r4 as well

[kelsfine69]

So is my 87..

[Goldfinger]

Is the vss the vacuum switch on the firewall?

[TJBrown]

mechanical here also.

[jimbonice]

I thought the 700r4 was mechanical, and the 4l60e had vss.
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[andrewmp6]

Goldfinger vss is what gm called there electronic speedometer pickup.

[Jonboy]

Originally Posted by andrewmp6

Goldfinger vss is what gm called there electronic speedometer pickup.

Not necessarily. VSS is Vehicle Speed Sensor. The green box that connects to the back of the speedometer head acts as a VSS also.

For your TBI swap, the easiest one to use that I found was from Stealth Conversions (JTR), part# 2PRS. It is the 2000 pulse per mile VSS, and it connects to your existing 700R4 at the speedometer hookup, you screw it between teh trans and the cable. It is a 2 wire hookup.

[beamn7]

700's had a cable up until about 90-91. After that point they had a speed sensor that installed into the trans in what looks just like a speedo gear adapter but had a sensor rather than a gear. Once they became the 4L60E in 92 they all had VSS's on the trans. The 2 wire plug you mention most likely is for the torque converter clutch if it is a plug on the drivers side of the trans that goes straight up and down and has room for 4 wires in the connector. Beginning in the early 80's most of our trucks did have speed sensors though and as previously mentioned, they are behind the speedometer. You should be able to pick up your input off of that....
Are you planning on keeping the truck registered here in CA? If so, you may want to do some further research as I too have been looking to do a TBI install but nobody has a system as of yet that is C.A.R.B. certified....
Howell Fuel Injection out of Howell, MI is currently in process of getting an Executive Order # from CARB for one of their kits though....
Hate to see you spend the time and money and then not be able to get it smogged / registered....