After using what I thought was the transmission out line carrying hot fluid to the cooler (the top line), I found that it is in fact the other line. So, in order to get a true accurate temp for my transmission, I'm forced to switch my Autometer manifold over to the other line. This leaves me with a severed steel tranny line.

I mounted the Autometer manifold upfront behind the bumper for ease of access, so what I'm thinking about doing is running up to NAPA and picking up some rubber hose and hose clamps to fix it. I noticed there are patches of this hosing already on my transmission line, but I just wanted to make sure from the 'pros' here @ f150online.com that this is OK.

 

I'm pretty sure that the top line is the one that comes from the transmission?? At least that's the one I used to install my temp gauge to..... The lower line goes to the aux cooler and then back to the trans.

 

theres nothing wrong with using rubber lines on the tranny cooler..it comes stock with coolers anyway...zap!

 

Well, I double checked and I do have it on the top line (the one that goes into the cooler closest to the passenger side). It was ironic though, that after I had driven it ~100 miles my gauge barely tripped the 100 degree mark the whole trip.

When I got home, I felt both of the lines and the one I have tapped into was definately no warmer than 100 degrees and the other line was much warmer. Thats what leads me to believe I have the wrong line...

 

Check your ground wire on the gauge. Even thou you are using the line and it should be grounded, maybe it's not enough? I tapped into the rubber hose part of the line, so I had to add a separate ground wire to the sendor. I didn't do that at first, and wondered why my gauge did not move....

If the grounds are ok, you should have seen it at least move some when you got into stop and go traffic. Try backing up an incline, like a drive way, and you should see the needle move....

Mine will run just above the 100* mark while on the hwy in winter. Summer, it'll go to 150* and towing it'll go to 180*.

When the TC unlocks, you should see it rise as well. Then, when it locks, you sould see it drop some.

Good luck!

Mitch

 

Being as naive as I am, I guess I should've considered the weather in all this. The day and week after I put it in, the weather never topped the high 40's. This is probably why it never got higher than an 1/8" above 100 degrees!

Thanks everyone...