Trans Temp Gauge Install - HELP

[jhg120]

I installed a Autometer 5757 trans temp gauge with short sender. The normal sender will not fit because it hits metal inside the trans pan. I used teflon tape to seal the sender, which I guess can sometimes cause ground issues???

The sender is supposed to ground itself. So maybe teflon is issue.

Anyways, I then connect hot 12v wire to switched cigarette lighter 12v.

I then connect ground wire to ground wire of cigarette lighter...is that ok??

The gauge will cycle through but instantly goes to 250F and stays there.

Do I need to run a dedicated ground from gauge??? I daisy chained into other ground wire and think that was bad idea.

Opinions???

I've read that if gauge pegs to 250F it's a ground issue. I'll post pics or gauge installed, but would like gauge to actually work too!!!

Thanks all.

[jhg120]

It's 11:50 PM, 71F outside, and now it's reading 210F and it was climbing. No way it could be that hot.

BTW, the sender is in the trans test port.

[smj999smj]

Just run the ground to the chassis. You can put an eyelet connector on the end of the wire and just place one of the radio mounting screws through it.

[jhg120]

It was the ground from the gauge. Stupid me. Soon as I changed it all works fine. Hasn't gone over 155f with hard accels too. Thx

[Kestral]

That looks great I am thinking about one myself.