hey guys I got a question for you if you could help me out real quick.

I have a 904 and I have no idea what temp it runs at, however the trans tunnel sure does get hot when I'm driving it everyday with no carpet. I'm running a b&m supercooler I think it's called and that's it. I want to add a gauge to it but I don't really want to spend any/ or a lot of $$$$. I was wondering where should I be getting the temp reading from and if I could use a regular oil temp gauge, or a water temp. gauge to read the temperature. Why and why not. I've never even seen a tranny temp gauge so you'll really help a lot.

I was also thinking of putting a little low profile computer fan on the back side of the tranny cooler to pull some air through it too. I was thinking about wiring it in series with the radiator fan to avoid a bunch of extra wires and stuff.

Let me know what you guys think. Thanks a lot. I'll go with whatever you guys say.

-matt

If you have headers, they are probably what is warming the floor...

Autometer makes a trans temp gauge. I have one (electrical)on my car and it works fine.

There are various opinions on where to put the temperature sensor. In my case, going the easy way, I made a cut in the hose going from the trans to the cooler, and installed a T fitting (one hole for the sensor, the other 2 holes had hose barbs) there. This is one of the hottest temp readings to get.

If I had a steel trans pan, or could weld aluminum, I might have opted to put the sensor right in the trans oil pan. The temps would be lower here than coming out of the trans. I think as long as you know where your trans operates based on where the temp sensor is (so you can see if it's getting dangerously hot for whatever reason), where you put the sensor shouldn't matter.

There are trans temp gauges, that come with sending unit, I have an autometer brand gauge like this one. Even with where I put the sensor, I haven't seen the temps over the mid-range of this gauge, even in stop n go traffic. I do have a trans cooler that has a fan installed where I can turn it on in traffic, and that is a nice backup to have but frankly I haven't used it much, mostly just to test that it works. I put mine on a manual switch.

Your ex and the trans are heating the floor which does not mean that the trans is running too hot. Putting in a T of the correct type to add a sensor in the output cooler line(the front one) wil give you the hottest reading but the pan works good as said you get a baseline that you're comfortable with & watch for any spikes. I'd use the largest cooler you can fit plumbed after the rad(or bypassing it, my preference) and good airflow thru it.

thanks for the replys guys I think I'm just going to go with the T fitting in the trans. output line. I think it's the cheapest and should work the best. I don't really feel like taking the pan off for a gauge that I don't even really need. I just drive the car on the street even though it has a bunch of race parts in it. I've just never seen the temp of the tranny and it's kind of bothering me.

thanks a lot guys this kind of stuff gives me piece of mind