This is a continuation of my last thread.

I think I found my problem which is a clog in the send line. I blew them out relentlessly yesterday and had particles coming out, not alot but some. I want to just buy new lines but my question is, I tried following the trans lines and i lose them around the engine. Do our lines go through the radiator or not? Is it safe to bypass that if I use the stock aux cooler as well as the aftermarket cooler that I bought? My temps are staying lower after blowing out the lines but I seem to only have this problem when its around the 0* mark outside so I want to play it safe and try to cover all bases before it gets freezing out and I need to plow again.

Is there some sort of line drawing I can acess that shown the trans line routing?

Thanks, I appreciate it!

 

The lines do go into the radiator. If you bypass the radiator you'll lose a lot of your cooling capacity and probably overheat the trans if you use the truck for plowing.

I don't have a drawing of the routing. The routing was mainly determined to be easy to install at the factory. You don't have to duplicate it. Unless you pull out the engine and trans you might not be able to exactly match the original routing.

The lines go from the front of the trans to the radiator, then to the aux cooler, then to the rear of the trans. I wouldn't run two aux coolers.

And please, don't anyone get me started on how this cooler is supposedly an ATF heater. It is not.

 

I will state this, on my 99 I do not have an otw cooler for the trans, just the little factory one and an aux cooler that I added. Do you really think the otw cooler is plugged?

 

LOL Mark on the last comment.

So then can you tell me this..... What is the best way to clean out the lines that go through the radiator? That explains why the air didnt seem as powerful coming out through the send line.

I just want to make sure I get this as clean as I can, I would rather not have to replace the radiator, that problalby wont be cheap.

 

Im not sure Mike, Im just trying to cover all my bases. I just installed a new factory aux cooler so I know that is clear. To me it doesnt look like the lines go through the radiator but a bunch of people including Mark say it does go through the radiator. Thats why I want to see the routing diagram so I can figure this out because I do not see where the lines go to the radiator. I see hard lines at the bottom of the radiator that look like trans lines but I dont see how they get there.

 

There is no way to clean the radiator cooler. If it's plugged it needs to be replaced.

 

my truck don't have a trans cooler in the radiator
Maybe different years do

 

Hmmm, let me see if I can look this up. I thought we all had those.

 

Whoops, found this right off so I'm posting it, back in a few.

CAUTION: Do not attempt to backflush and clean the OTA transmission fluid cooler. Install a new OTA transmission fluid cooler as part of a transmission overhaul or exchange. Failure to follow these directions may result in transmission damage.

 

Seems Ray is correct. 2000 model year uses OTA cooler only.

 

Doug, 2003 MY uses both. I'll try to post up the pic, for now:

<title>2003 F-Super Duty/Excursion Workshop Manual</title><link href="S3O%7Eus%7Een%7Efile=S3Ostyle.htm%7Egen%7Ere f.htm" type="text/css" rel="stylesheet">Transmission Cooling

****** content="Transmission Cooling" name="tps_proctitle">
Automatic Transmission
The automatic transmission fluid cooling system consists of:

• an in-tank fluid cooler inlet tube
• a non-repairable in-tank transmission fluid cooler
• an in-tank fluid cooler outlet tube
• an oil-to-air (OTA) fluid cooler inlet/outlet hose assembly for the 4R100 transmission
• separate fluid cooler hoses for the TorqShift transmission
• an OTA transmission fluid cooler
• a fluid cooler return tube
• hose clamps
• a remote mount fluid filter and bracket for the TorqShift transmission

The transmission fluid flows from the transmission front fitting, to the in-tank transmission fluid cooler, to the OTA transmission fluid cooler, and returns to the transmission rear fitting.
CAUTION: Do not attempt to backflush and clean the OTA transmission fluid cooler. Install a new OTA transmission fluid cooler as part of a transmission overhaul or exchange. Failure to follow these directions can result in transmission damage.
For fluid cooler flow testing, and backflushing and cleaning procedures, refer to Section 307-01A or Section 307-01B .

 

2003 Transmission cooling image:

2003Trannycooling.gif?t=1230428608


Item Part Number Description
1 7A095 OTA transmission fluid cooler
2 — Fluid outlet
3 — Fluid inlet
4 7F113 OTA fluid cooler inlet tube
5 7N291 Fluid cooler tube bracket
6 7A030 In-tank fluid cooler inlet tube
7 7A031 Fluid cooler return tube
8 388160-S101 C-clip
9 7N291 Fluid cooler line clip
10 7H322 Cooler bypass valve (CBV)

 

Thanks Mike!

I will unhook the lines to the radiator and try blowing those out as well. I hope this is all good to go!

 

Doug, there is a flush procedure I won't bore you with because you don't have the flushing equipment and solvent tank. All I can say is you may want to install an extra line filter after all the coolers for debris. Run it for a while after flushing, then replace or remove. This flushing runs the risk of dislodging debris. Your tranny is at a huge risk of damage. Good luck.

 

Doug, I didn't know you needed help with your trans lines,etc
you should have called me