700r4 trans lines

TDSRacing

New member
I am running a ext filter before the cooler so I need to know which of the 2 lines is out and which is in. Top or bottom.
 

MikeRenz

not stock
Re: 700r4 trans lines

top should be output of rad to input of tranny. Just disconnect one and crank the truck see which it shoots out of.
 

George Blake

DONATING MEMBER
Re: 700r4 trans lines

Safest way is the way Mike said to do it. Disconnect a line and see which is which.
Top fitting on the trans is the return line if you can keep track of the lines.
From the Hotrodders board:
[font=Verdana,Arial,Helvetica,sans-serif]Transmission fluid cooler lines: on the 700R4 the bottom fitting on the right side of the transmission is the "out" line to the cooler and the top fitting is for the return line from the cooler. These fittings are 1/4-inch pipe thread[/font]
 

denny

Active member
Re: 700r4 trans lines

The bottom line at the radiator is the out from trans, the top is the into trans.
Another way to tell is, right after start up , feel the lines with your hand. The hot one would be the out and cold-er one is the into the trans.

Denny
 
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Syclone Rob

Its all ABOOT the SYTY eh
Re: 700r4 trans lines

trans_diagram.jpg


So is this diagram wrong? This is what I followed...
 

TDSRacing

New member
Re: 700r4 trans lines

Thanks to ALL!!!! Great info is to be had on this board. Off to join the power tour today!!
 

George Blake

DONATING MEMBER
Re: 700r4 trans lines

That chart isn't indicative of fluid flow. It just gives a clean way to hook everything up and it's not "wrong". IF you install an inline filter setup though, you need to know "in" and "out" of the trans because if you hook the filter up backwards it will cut off flow.
Syclone Rob said:
trans_diagram.jpg


So is this diagram wrong? This is what I followed...
 

MikeRenz

not stock
Re: 700r4 trans lines

George Blake said:
IF you install an inline filter setup though, you need to know "in" and "out" of the trans because if you hook the filter up backwards it will cut off flow.
yes, how true this is. :lol: ain't that right _______? :rotf:

[the person's name has been hidden to protect the guilty]
 

Syclone Rob

Its all ABOOT the SYTY eh
Re: 700r4 trans lines

Tommyquest said:
Just to clarify put the temp sensor on the hot (out) side.

Stupid me just followed that diagram exactly (other then I am not using the stock rad cooler) Today I tested the system and sure enough I had the system hooked up backwards. Though I had tons of fluid flow thru the filter backwards when I tested it?!?!?! Should I replace the filter just in case or do think its still good? I see no contaminats in the oil.
It was a simple easy fix since I used all those fittings. Good thing nothing seems wrong and the tranny is currently working great (knock on wood!!);)


So for clarity for anyone reading this thru the search..

THIS INFO is for the 700R4
Top Port is the return feed to the tranny from the cooler. (cold)
Bottom port is the Feed out from the tranny (Hot)
 

George Blake

DONATING MEMBER
Re: 700r4 trans lines

The external system uses a conventional oil filter. Your transmission's pressure varies. At idle, you'll have tons of fluid making it through the filter. Pressure builds at high throttle and road speeds, this going through the filter backwards will make the spring loaded "bypass" door in the filter slam shut leaving you with minimal fluid flow.
 

TDSRacing

New member
Re: 700r4 trans lines

Syclone Rob said:
Stupid me just followed that diagram exactly (other then I am not using the stock rad cooler) Today I tested the system and sure enough I had the system hooked up backwards. Though I had tons of fluid flow thru the filter backwards when I tested it?!?!?! Should I replace the filter just in case or do think its still good? I see no contaminats in the oil.
It was a simple easy fix since I used all those fittings. Good thing nothing seems wrong and the tranny is currently working great (knock on wood!!);)


So for clarity for anyone reading this thru the search..

THIS INFO is for the 700R4
Top Port is the return feed to the tranny from the cooler. (cold)
Bottom port is the Feed out from the tranny (Hot)

Reading this then I should route the hose from the bottom port to the in on the filter then to the cooler and back to the top port. I "thought" that is how I have it but after about 30 seconds of running the trans will whine BAD if put in gear, it quits if put in park. I have not driven it at all since it is a new trans and I need to get it right.
 
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