Trans. Cooler line hookup?

[72 K20]

I need to know which cooler line is the outlet and which is the inlet on a TH350 automatic transmission.
I have searched everywhere and cant seem to find an answer. Right now the upper line runs to the radiator cooler then through an aftermarket cooler then back to the lower line. Any help would be appreciated. Thanks.

 

[wasted wages]

disconnect the two lines and point into a bucket . Have someone crank the truck for a second or two....should be self evident pretty quickly which one is which.....

 

[GRINCH]

Maybe this will help all searchers!!! For all Trans...

Cooler Fittings
General Motors Ford Chrysler

GM Transmission Cooler Fittings


Powerglide - OEM
Fitting Location Thread Size Flow Direction
Upper ⅛" Pipe Return/in
Lower ⅛" Pipe Cooler feed/out


Powerglide - Dedenbear
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


TH200C Metric, 2004R
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Cooler feed/out
Lower ¼" Pipe Return/in


TH350, TH250
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


TH400
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


700R4/4L60/4L60E/4L65E
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


4L80E (1991-1996)
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


4L80E/4L85E (1997 & later)
Fitting Location Thread Size Flow Direction
Rear ¼" Pipe Return/in
Front ¼" Pipe Cooler feed/out


Ford Transmission Cooler Fittings

C3, C4, C5, C6
Fitting Location Thread Size Thread Size Flow Direction
Front ¼" Pipe Cooler feed/out
Rear ¼" Pipe Return/in


AOD
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Cooler feed/out
Lower ¼" Pipe Return/in


AODE/4R70W
Fitting Location Thread Size Flow Direction
Upper ¼" Pipe Return/in
Lower ¼" Pipe Cooler feed/out


E4OD/4R100
Fitting Location Thread Size Flow Direction
Front ¼" Pipe Cooler feed/out
Rear ¼" Pipe Return/in


Chrysler Transmission Cooler Fittings
All Torqueflite
Fitting Location Thread Size Flow Direction
Front ⅛" Pipe Cooler feed/out
Rear ⅛" Pipe Return/in

 

[72 K20]

I never thought of that wastedwages. Thanks

90k5blaze, thats great. Nobody will have a problem searching now. All the info in one place, doesnt get any better than that.

Thanks a million for the quick replies.

 

[odin]

Maybe this will help all searchers!!! For all Trans...

Very nice