yes I saw found one of those! Also found another one, like Earl's brand.

Thank ya.

Curious though, will tube and hole size affect flow of tranny fluids?
The Earl's brand is 10an, while the derale (mixed reviews) is 8an (1/2inch).

??

Interesting

The 501ERL? Yea, that's a sexy one. I like the option of a sensor port in it, that it is rebuildable, and one would conclude that larger inlet/outlets would dictate larger passageways. That said I think the tranny lines are only 3/8th" and 5/16th". 5/8th" (10AN) is a big size jump. My biggest question is the return flow characteristics on both of them when the thermostat is closed, or if it even matters.

I've used Derale products a lot, all three of my heat exchanges are made by them. Never had an issue with them and they have done their job; that of course does not mean they are perfect, just an opinion. I have never used their (derale's) in-line thermostat. I have read the same bad reviews. I think with all bad reviews you have to try to look at it from all angles. The derale unit is a good deal cheaper then the alternatives meaning they most likely sell a crap ton more, which means more statistical odds of bad things happening. Again, opinion. I do like that Earl unit, and I've never had an issue with their fittings.

I know the earl's keep it 10% open when closed fully if that's what you mean. So the derale works just as well then for daily? coolio.

What is your setup look like?
I was thinkin...
Tranny -> stock trannycooler -> derale *

* -> TrannyCooler2 -> derale -> tranny (this route when opening)

* -> tranny (when closed, theoretically, even though it is partially open)


This way I'malways measuring fluid after stock tranny cooler and if it's too hot then go through second step down.


I kind of wanted to originally do a 3line thermostatic setup, but I couldnot find such a thing that exists, a 3line thermo with characteristics set up for automobile fluids.

Tranny -> 3line Thermo *

* -> stock tranny cooler -> T line -> tranny (closed)
* -> aftermarket tranny cooler -> T line -> tranny (open)

How do you have yours setup?

Definitely NO

Not designed for a transmission oil cooler

But go ahead and do it and let us know how it works out :rofl2:

Derale state both the 25719 and the 25011 can be used for transmissions. Could you share your insider information?


I do not have a in-line thermostat on my transmission lines. It goes from tranny -> 24 row cooler -> OEM heat exchanger -> tranny. The OEM is runs inline with the water heat exchanger, so it keeps the tranny fluid temps around 185°-190°F. The theory is to use the OEM as a regulator for fluid temp control/management. If I used an in-line I would go the route you sound like you are planning. Most would complain that I am just negating the effects of the aftermarket cooler but since it's not really ideal to have ATF cooler then 175°F I think it does just fine for my needs.

Real world experience with in stand alone inline thermostats and their failures and limitations.

I'll never use a stand alone inline thermostat again as they are not reliable enough.

Yep, any chance of cutting off the flow to your AT is going to be sudden death. You can get coolers that auto regulate. they have different size tubes within the cooler which allow more fluid to to flow through more passages within the cooler, thus providing more cooling as the fluid heats up & thins out. B&M comes to mind for some reason :cool:

As Zat says, Do not put an inline thermostat on you AT.

Hm interesting, but the idea is that it wouldn't ever block any actual flow? if it got stuck open it's always flow to the aftermarket and if got stock closed always through the stock cooler and back to tranny (how i would plan to set it up)?

And the blocking pin piece that moves wouldn't ever full block would it? If it ever got stuck in the middle wouldn't it get stuck in half/half or some other combination such as that adding up to 100%flow rate (considering the way it is designed?)

The ONLY ways I could see it being detrimental to the AT is if the pin somehow came out too far, came all the way out, or it got jammed in way too far and blocked both routes

Could you please share which product you specifically used on which which specific make and models of cars and which years and some of the failures and limitations you speak of?

As much as I trust someone on the internet by their general words, well frankly, it is a bit difficult, too considering the lack of specificity in your posts.

Please don't take that personally.

Hey ScoobieZ, my mistake on the stoppage of flow as I was thinking more of the lines of a standard thermostat. But I still would not want to rely on a spring to regulate the flow to the cooler. I prefer the cooler to do the regulating. Also you should really install a temp sensor so you know what type of temps you are generating. This will give you an idea of what size cooler you need as well as if the cooler you installed in doing a good enough job.

$.02 ;)

Nope, that's just too much work to detail the failure. The in-line oil thermostat is long gone, dissected and once the issue was discovered; thrown out.

I wont use those on my vehicles, nor do I recommend them. It's your choice to accept my words of wisdom. After all, its your car and your repair bill, if things go wrong.

Please don't take it personally, but I don't have to prove a damn thing except to myself lol

... okay then don't expect anyone to take you seriously if you're not going to even provide which product you used on which car. If you can't provide even that much information then why are you here spreading your information not backed by anything?

This leads me to believe that:
1) you're embarassed because you didn't install something correctly or didn't know how it worked
2) you're embarassed you bought a 20 dollar stat and it did not work as you expected
Or
3) you're completely full of ****.

So if you're not going to actually add anything of value to our discussion other than general threats please leave. Sad that a base member has to tell a "premium" member this.

Real truth is that as a non-premium member, I wont really support you because you don't support the forum.

My intelligential property is mine and mine alone. I share with people, shops and manufacturers that can make a difference and that are local.

I don't really care if you like it or not ........ lol

Take my advice or don't. ...... DILLIGAF?

Case closed ....... support the forum!

Once again, sad. Very sad. Anyone can pay money to have a star by your name, but to actually contribute is a whole different story.

Anyways, if anyone else has a some beneficial or helpful information please don't let zat_zuma kill this thread flow as I believe we're touching on some important information here.