Which port has the highest temperature tranny fluid?

Front servo pressure
Rear servo pressure
Overdrive clutch pressure
Governor pressure
Accumulator pressure

I tried the overdrive clutch port, but the DiPricol sensor won't fit... I'd rather not put the sensor into the deep pan.

 

None of them do. You have to tap the hot line by either a trans temp probe adapter that fits over the liner or by replacing the hot line itself with a line that has the adapter tee'd into it. DO NOT use any of the ports...they are there to read pressure and if you install the prob too deep it can bind with the sevos. Installing a temp prob in the ports will only give you case temp...not fluid temp.

Although you do not want to put the probe in the pan.....the pan is much better then a port any day; hot line the best.

Richard

 

x1000 on this one Mike. Before I knew better, my first set of gauges I had installed at a local diesel shop. Soon I had a malfunctioning tranny temp gauge as they installed the probe in the port that is in the rear right of the tranny. (not familiar enough to know which is which, not my area) They took out a mangled probe and replaced with a new one. Soon after that, it happened again and this time some tranny work was needed to replace the piston in the port.

On my Goerends tranny, it is now installed in the hotline as raychem described above.

FWIW, the difference in the tranny temp reporting (what I saw in temps coming from the port vs the hotline) is very alarming... I don't think the ports, aside from the mechanical interference, is a very good place to check what is going on with tranny fluid temps.

 

That figures - always a pain to finish what another started... I prefer ordering parts myself so this doesn't happen.

Thanks guys.

 

The earlier Dodge 'hot lines' (47re) had the port built in (1995 I believe). Should fit 48re also. Same case...No??
Works great on mine.

RJ

 

whats the easiest way to tell which is the hot line? i bought a tee about 6 months ago i really need to install it.

 

No, the older lines will not work since the layout for the cooling system from the 2nd to 3rd gens are completly different.

Richard

 

Hot line comes out the front of the trans.

this has been discusssed so many times and I am with soulezoo, it is ALARMING to see the actual hot temps. I truly believe that those who have said they have seen little difference in temps recorded in the hot line and one of the ports have something obviously wrong with the setup of the gauge.

Alot of folks don't care for the temps out of the hot line and prefer the pan temp as they want to know what fluid is being pulled back into the trans. I prefer the hot line after it is leaving the converter. Same way I do the race car.

Oh, after trying 2 of the lines sold by one company and having leaks, I bought a good compression fitting "t" and plumbed it myself and haven't had a drop of fluid lost in 30,000+ miles since the change.

 

The "hot line" is always the port that discharges nearest the engine. In other words, there are 2 lines that you will see on the drivers side of the truck. The one nearest the engine is the TC discharge line. The rear line is the return line.

Richard

 

You just cut the hard line from the case to the coolant/ATF heat exchanger for the compression Tee? Guess I have to put the appropriate part # on the blanket order.

 

yeah, if you look close at the pic in this link. I am not sure if it is ok to link to this site or not but here it is.

http://www.dieselmanor.com/dm_products/DM-CLG3.asp

I went to Lowes and bought the "T" and never looked back. Just cut the appropriate amount out of the line and installed the "T". I want to say the "T" was 1/2in.

 

Sorry to bust into a 3rd gen thread but I'm curious. What range of temps do you see? My 47re hot line is fairly stable at 130-140* with a few exceptions...
-Backing up a heavy load up a slight grade... 250 in about 60 sec. (that did shock me)
-Gridlock...... 200* without reving in neutral
-20* jump if following an 18 wheeler (blocked airflow) on crowed hwy.

Is this the kind of variations you refer to or am I missing something... or is the 48re more different than I thought??
Thanks in advance for input.

RJ

 

Ever try splicing into the hose portion of this line?
Hose clamps probably wouldn't hold the pressure, but crimp clamps should...

 

RJ, what temps do you see when racing?

When you hooked at Alvarado, did you unpucker from the seat cushion long enough to check tranny temp?

 

After 3 passes at 1/4 mile....in mid summer, I'd be pushing 180-190* and let her rest for a while!
After pull no big jump.... but remember, 4Low and only a 5-7 sec run makes a big difference.
Especially since my biggest problem pulling was working at having the tranny fully warmed up!

RJ