[Gmecm] speed sensor and trans question for carb to TBI swap

[Ne14RoxCJ]

The speed sensor is an optical sensor mounted in the back of the
speedometer. It is attached to a blue/green buffer box (about 2"x3" with 3
wires about 8" from the speedometer) which then sends the signal to the ECM
and the cruise control module. If your '82 has cruise control, this should
all be there already. There is a place on the buffer box to plug in the wire
from the ECM. If you find that you don't have any of this in your truck,
look for one at the salvage yard. I am almost positive that your speedometer
will have the hole for the sensor to mount in even if it doesn't have the
sensor. I just packed one away last night as I am in the process of moving.
I could possibly dig it out and get a part number if you need it, but I
think the salvage yard would be the best place to look.

 

Beau

 

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From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
Of Steve Ravet
Sent: Sunday, February 12, 2006 3:47 PM
To: gmecm at diy-efi.org
Subject: RE: [Gmecm] speed sensor and trans question for carb to TBI swap

 

 

 


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From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
Of Cory Frey
Sent: Sunday, February 12, 2006 1:29 PM
To: gmecm at diy-efi.org
Subject: [Gmecm] speed sensor and trans question for carb to TBI swap

Hello all I have tried searching through the archives for this question but
I have not had any luck .  I am converting an 82 c10 truck with a 350 SB and
a 350 turbo hydromatic trans (non lock) over to a TBI setup. I am still in
the "gathering all the components stage" to do this. I have got just about
all of what I need except for a speed sensor 

 

 

There are inline speed sensors that you can use that will allow your cable
driven speedo to still work.  You should be able to find what you need at
www.jagsthatrun.com, they have a variety of VSS sensors. 

I have not been able to find much info on a speed sensor to add to my setup.
Do most people leave these out on their conversions? 

Also since my trans is the non lock up flavor. How do I shut that feature
off in the ECM? I have the CATS RT tuner software and the Romulator II. Is
it just a matter of turning the error code switch off?

(1227747 ECM) 

 

There's no error code with TCC, just leave that wire disconnected.  There's
no feedback that allows the computer to tell if the TCC is functioning or
even connected.

 

--steve

 

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