Don't forget the warmup bypass tube on the side of the tranny. I forget exactly what it is called, but it bypasses the cooler to help warm the fluid on a cold day. If that is stuck open, your temps will rise. Also, if that is stuck open, you won't pump all of your tranny fluid on the ground with a broken cooler line, just some of it.

 

If you're only gonna pull a coupla horses once in a while, don't bother with the extra cooler. Restore your tranny cooler system to stock and spend your money on something you REALLY need.

I've pulled a 15k 5ver for the past 6 yrs/198K miles on a stock setup throughout the US. No worries Mate!

 

No, I think he still needs the extra coolers(s). He's already running 200* in town without the trailer and in winter. The '99s are known to run hotter than our years. They don't have the oil to water coolers in the radiators like ours and most people have to add extra cooling to them. There is nothing wrong with 200* but I wouldn't want it to run hotter than that.
IMHO, Joe

 

How do I check my flow rate?

-Once I get into it a little deeper, I'll see what exactly was done and can decide from there. I just hope it's not a big mess.

 

• Bring the transmission up to temperature. It needs to be at least 100 degrees for this test.
• Turn the truck off.
• Remove the rear line from the transmission and place it into a bucket or similar container so that you can measure volume of your flow.
• Have someone turn the truck on.
• At idle (in park), you should measure 32 ounces of fluid in your bucket - in 15 seconds or less. This is an absolute minimum number. A properly working transmission will flow that amount in about 10 seconds or less. You should not see ANY fluid pumping out of the rear transmission port.

 

Thanks, I'll print that out and see how she does.

 

If oil is flowing out of the rear transmission port, there is a good chance that the warmup bypass valve is leaking.

Also, when you test the flow - remember to top the level back off when done. Sounds simple, but low fluid will cause them to run hot too.

Another thought - check where the temp sender is located. The sender should be in the port on the drivers side of the trans. If it is teed into the fluid line, it can show a higher temp then it should. There is some good info on this site:

http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=205

Finally - this is going to sound dumb, but it is true. I have a ford reman tranny in the F450 I have. About 15K miles into the warranty it started to run hot (like 200 deg on a winter day). I took it to the local dealer, and they checked everything out. Turns out it was my up-pipes. The pipes were leaking, causing the motor to be down on power. The PCM was modulating the trans to try and compensate for the lack of power, and caused the trans to run hotter. I fixed the up-pipes, and the trans temp dropped 40-60 deg, depending on how I was driving it. Like I said, sounds crazy, but true.


EDIT: You may think the dealer "said" it was the up-pipes and actually fixed something else, and charged me for the pipes, but I did the pipes myself - the dealer did not do anything.