Here's what I found in case anyone is interested:
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I bought an Autometer trans temp gauge for my '96 dually when I had it.
It was a 7.4 & 4L80E. The 4L80E has a pressure test port on the driver's
side, just above the shift linkage. It will have a pipe plug in it.
Remove, install the sending unit (mine went in as-is with no adapters)
and hook it up. Couldn't be easier and worked great.
Edit - By the way, I verified that it was a good place to put it by
checking the temperature all around the transmssion case, pan, etc. with
an IR thermometer - it was consistently within 1 degree of what the
gauge said. And, I am about 99% sure from recent memory that the 4L60E
and 700R4 have these ports, too, for the guys with those trans that want
to install a temp gauge.
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Michael Pell wrote:
I'm wanting to put a trans temp gauge in my '96 Dually with 454 and
4L80e trans.
The 4L80e has an internal temp trans sending unit, and you can take a
resistance reading from the VCM (under the hood).
So, I know the wires, I have a resistance chart, but, can I actually
connect an aftermarket gauge to it?
Any suggestions? or website reading recommendation?
Thanks,
Mike
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