trans temp

[andyrob]

I wouldnt think g/box temps will be too high for drag racing, less than 30 secs of punishment, long distance motorway driving will see a lot higher temp ?
I think as long as you have a decent oil cooler fitted it will be ok

[Dave-R]

Glad I got something right this week.

So far this week at work lost a camcorder, completely messed up some wiiring, and got lost and confused on my way home just three streets away from my house.
Not doing too well.

[AllKiller]

Dont be so hard on yourself Dave, i messed up some wiring on a YUV video patch the other day, ....made Laurence Delalio ? look like the incredible Hulk.....laugh
sometimes its just Natural

Hope your OK though

[MrNorm]

I don't know why you guys think the trans temp is so critical?

Trans oil can take a lot of punishment.

The issue here is longtivity.

A colder trans will last a lot longer. A hotter will wear out quicker.

But even a hot trans (220F) will last a very long time.

As long as you get the trans temp down to below 200 (colder the better) it will be fine.

What you need to look for is changes in the regular temp over time. That is an indication of things not working right. The actual temp is neither here no there.

No need to be a fanny about it. Just stick a sender in the pan and be done with it. I can tell you from experience that any changes in the trans WILL effect the temp with the sender there.

Well I dunno who was saying the exact temp is important, personally I was saying quite the opposite - that fluid that is too hot is a trans killer, so peak temp is what you need to know. Which I think you are agreeing with Dave if I read your post?
So we are in violent agreement - keep it below 200 deg. If you don't your trans may suffer (e.g. http://www.perma-cool.com/Catalog/Cat_page02.html.


The question is, what is the best place to measure the temp to ensure you aren't going above 200deg? I still can't see past my logic which says if (for example) the temperature out of the cooler is 180 deg and that is what you measure, does that tell you whether the fluid is going over 200 inside the trans? No.
You need to try and measure it at its hottest.
What I don't know is where that point is (after the TC for sure) and whether the sump temp is a good approximation in the 727 - still waiting to understand that, maybe I need to dig out the FSM.

[AllKiller]

You can measure the trans temp in the fluid going in or out or in the sump

In would be to cool...and the sump and outgoing i think will be virtually the same
I'd put it in the sump

[Dave-R]

[quote="MrNormso peak temp is what you need to know. Which I think you are agreeing with Dave if I read your post?
[/quote]

Nope. What I am saying is that it does not matter if the temp is higher in one spot and cooler in another. As long as the temp in general is not high that is all that counts.

The chart you show is just the general trans temp. Even the coolest part of that chart will have some parts in the trans operating at much higher temps. That is factored in.

The point is that, if one part gets hotter than it should do, the sump oil (and trans case) will get hotter too. No matter where you place a temp sender.

[Dave-R]

Cooler the better. 180 if possible. Same as the engine.

[AllKiller]

Air con rads make fantastic full size trans coolers, thin too
mount in front or behind the Rad,
Old trick on the GNs..... loose the a/c and run the trans fluid through the A/C rad and back to the trans
for that stock look.

But no reason you could nt do it Steve

[mopar_mark]

Put it in the sump, good trans cooler helps.

Dont hold on the Trans brake too long, nothing like a trans brake for creating some additional heat.

[MrNorm]

I don't agree Dave.....if trans fluid starts breaking down over 200 deg then it doesn't matter what the average temp is, if it has peaked above 200 then you are degrading the fluid and possibly damaging parts in that area. The average could be 180 but in parts of the trans it will be higher and maybe other parts lower - how do you know? Measuring the peak has to be the best - in theory!

In practice there may be all sorts of factors, it may be that there is never more than a X deg rise, for example, or that the peak is never more than Y deg above the sump temp - in both cases you can therefore infer the peak from another location - but you'd have to know those other factors, which I don't

So I'm not arguing against fitting the sender in the sump - I just haven't yet seen a convincing reason to put it there. In all probability one does exist (maybe what I postulated above?) and usually if enough people do it there is a good reason.......but I like to know them

[Kev]

and usually if enough people do it there is a good reason

Or it's a lazy/easy way?????????

[AllKiller]

Ok but where else could you put it ????

or put 2 or 3 on it ....In, Out, sump

[Kev]

Original Question:

were do you recommend plumbing in my trans temp gauge

Don't bother fitting one!

[Blue]

Ok but where else could you put it ????

or put 2 or 3 on it ....In, Out, sump

You could easily put it in the pan or the feed to the cooler or the return from the cooler, depends what temperature you want to measure. Me, I'll put it in the pan, I'm only interested in the average temperature, I can use it to convince myself I have a big enough cooler, and I know I have a problem when the temperature gets a lot hotter than it normally does, before It fails.