TH400: Dump Valve Information

[@flinch622]

Good point on solenoids. And in the case of anything DC, heat can bring an odd issue when pushed to the edge: coil holding power/saturation can change in some designs. Electronic stuff? ... I like keeping it under 85% of rating for a longer life, cause most of the time that works. By that measure, 250 degree fluid needs a 300 degree sv rating [rounded up]

[@stuartbuckley8720]

Thank you Shawn for the great education and entertainment at the same time.

[@timdontwannasay5889]

I ALWAYS learn from your videos! Thank you sir!

[@timweb1510]

Thanks for sharing your knowledge. I have a basic th400 and trying to learn more

[@kevinlarrick8288]

Great video you save people a lot of money

[@BigFun4Life]

Another great video,as always thanks for sharing….

[@KarKamp]

Im going to look into that better quality 1/4 inch valve because the heat was my first concern

[@jeremymcnicol9585]

Great video and thanks for posting

[@KarKamp]

That PTFE nylon braided line I've recently used and its better than I thought but it is really rigid

[@funfun8095]

Earl's, is a lot more flexible. Best one on market.

[@wesleyspurlock537]

another great video, keep up the good content.

[@Go4BrokeOffroad]

Not so much a dump valve question, but could one run an external fluid pump and force fluid back into the return side of the cooler port for in between run cooling? I'm not drag racing and would be nice to turn on a chassis mounted pump to bring temps down.

[@unkiesmunkle]

Thank you for the vids Shawn. I searched way too long looking for any solenoid that would fit these recommendations, the sv10-22-0-n-00 is large and heavy 3/8" npt in and out and rated 3000 psi pressure but only rated to 120 degrees temp. I havent found any Hydroforce or any other solenoid that has around 300 degrees and any good (over 180 psi) pressure rating. I noticed the big company dump valve kits all have custom proprietary solenoids, must have their own made for them! Im ready to throw in the towel or try one of the lower rated cheapos because there doesnt seem to be any with the ratings I want!

[@ethancash8760]

Hey did you figure it out? I have a solution. I did the same research

[@carltotillo8301]

I built my own valve body using Hydraforce cartridge valves in a 4 way manifold. It it shifted with a PLC and has a transbrake. No shifter is needed, unless you want Park.

[@theturbomullet]

Gotta part number for the valve you’re going to use? Love the vids!

[@tim1743]

Hey Shawn, do you know the part number for the Hydraforce valve, i looked but too many options. Cheers

[@mountainsgarage]

Discount Hydraulics SV10-22-0-N-00, about $75 shipped. They just got back in stock! Ordered 2 this morning!

[@Turbo8secondz28]

What was the name and part number of the other suggested solenoid? And also how did this work for you?

[@Jason-kn3tw]

Been looking doing a dump valve setup , but I'm a little confused, you have another video showing one burnt up because of having cooler line setup but you're also fitting one yourself? Is this only for transmission that have had extra pump mods to increase line pressure so dropping some with the dump valve works ok ? Cheers just after some basics

[@jamieknight9636]

Hey Shawn, ran the Hz last night and used the dump valve. Lower cooler line pressure 70psi in low gear dump closed, 35psi dump open. Convertor feed is restricted to 1/8'. seem about right? maybe going to the strip Sunday so will see how it's changed things.

[@jamieknight9636]

Great vid thx Shawn. Something to think about is the dump valve needs to be normally closed ? Powered to open especially on a streeter

[@ai_university]

Dump valve is normally open and powered to close. Typically with a transbrake valve body the line pressure is always pegged at max (around 200psi), from idle all the way to redline. Doing so is hard on internals, especially in a street car that sees high rpm on the highway. The valve is activated (closed) when the transbrake is engaged (usually via a button on the shifter). This retains the normal function of the transbrake but is much more street friendly. Transmissions in street cars without this will fall in a few thousand miles.

[@jason7475]

External dumps on a th400 don't really work well. And if you starve it of fluid for long you will hurt the trans

[@mfuente1]

If you use this set up do you mod the pump as well with the set screw and the drilled hole or it’s and either or scenario

[@th600mike3]

I have a gems solenoid from amazon im willing to try. The us solenoid I agree is kinda scary. The gems one is about 38$ but the internal diameter is very small. Also a 1/8" npt. But it's rated for 1000psi, and plenty of heat. Stainless body. If the one you run from hydra force is a good deal I'll probably get one. But my application is a bit weird, and an 1/8" is actually enough.

[@juanmangerita]

Can this dump valve circuit be fitted on a Ford C4 transmission? Thanks

[@funfun8095]

👍

[@unkiesmunkle]

can this external dump setup be used on a 4L80E with full manual VB and lockup?

[@v8tergt653]

Has anyone tested this yet?