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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> What type of wire to be used in automatic transmission oil
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Topic Review (Newest First)
07-06-2012 12:23 AM
tayto Thanks SS, I found this one as well:
AC Delco 24235642 AC Delco 24235642
. According to the picture it looks like the correct harness.
07-05-2012 02:52 PM
SSedan64 This one looks to have only the 4th gear & Temp connectors.
700R4 TCC Lockup Solenoid With Harness 700R4 Converter Lockup Solenoid

Local Trans Shop may also have the one you need.
07-04-2012 05:39 PM
tayto If I could get a new harness I would go that route as the plastic conduit is broken in many places. Any idea if they make a harness for a 1989 Caprice 5.7L? I have seen some delco ones but there is no information on what they are for and ythe pictures are crappy. I would need the one that has 4th gear switch going to the ecu with the temp switch. And then 2 wires for the lockup solenoid itself.
07-04-2012 05:35 PM
Crosley I would think a GXL or SXL wire would resist oil

Shrink tube needs to be polyolefin material. I use dual wall with adhesive inside it that flows out under heat.

Trans oil will soften up the budget shrink tube, been there.

or purchase a fresh replacement wire harness . Rostra is a quality brand harness
07-03-2012 10:59 PM
What type of wire to be used in automatic transmission oil

I'm on the final stage of rebuilding my 700-R4. My lockup wiring is very brittle, bending it about 90 degrees will cause the sheathing to break. I am wondering what type of wire is recommended for use inside the transmission. Is heatshrink OK to use in transmission oil?

Also I have a temp switch currently in my trans. From what I have read if the fluid gets above a certain temperature the switch will close and cause the torque converter to lockup in an attemp to cool the transmission down. Should I keep this in the circuit or is it OK to bypass? FWIW, TCC will be controlled via ECU.

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