i have a new trans new touque converter and new cooler when pulling a load my trans temp is 240 what can i check next

 

Are you running a tuner or chip? Seems pretty dern high. Did you go with the 6.0 cooler? Mine never goes over 180-190*.

 

Why the new converter and trans? I suspect the old one failed. If so it probably put debris through the cooling system so that the coolers are plugged.

Here's how to test it:

Get two clean containers, each at least a gallon. One piece of clear 7/16" tubing at least 5 feet long.

Warm up the transmission. With the engine off remove the cooler line from the rear of the transmission. Attach the hose to this line. Put the other end of the hose in the first container. Have someone start the engine. Leave it in park at idle speed. Once the flow is steady move the hose to the second container for exactly 15 seconds then move the hose back to the first container and shut the engine off.

If fluid sprayed out of the opening in the trans the flow test failed. Something is blocked or the bypass valve is stuck open. A small drip from the opening is fine.

If the second container has at least one quart in it the test passes. Anything less indicates low flow to the coolers.

 

Sounds like your on your way for an over haul fairly soon
Something anit right.


What size cooler did you put in it?

 

thank you i will try that. we did put a new cooler on but i could have a clog somewhere

 

thank you also when th trans is cold in the mornig it is a 4 second lag till the truck moves

 

Sounds like the new trans is no good. Mark is the man on this subject. Check his sig.

 

I have a giant cooler on mine and towing my 7000lb enclosed trailer uphill at 75mph I never see over 180F.

 

You need to post more on the trans. Who built it? It sounds like its
trashed already if it takes 4 seconds to move when cold. Unless its your EBPV being closed. And what kind of convertor. My trans has never been over 168F towing 30ft towhauler fully loaded in the summer. I have a 6.0L cooler and JW trans . Dose it slip when cold when it starts to move or just won't move. Chet

 

I am not sure what kind of touqe converter I had a friend recommend this guy and I payed him 2600 and he already put in a new converter i really made a mistake I had 260000 on the original one.the answer to your lagging on cold starts it doesn't feel like its slipping just no moving for a few seconds

 

Sometimes in the morning my truck will lag a second or three before it finds "D" but it's never been an issue and it's done it for years.

 

Thanks I am going try the test mark suggested

 

mark this is peter with the f250 trans overheating when pulling a load. i did the test the trans was hot when i took the rear trans line off fluid was pouring out the rear end of trans i started the engine and it was pouring out of the trans not the line what imfo should i give my mechanic to replace the back flo valve or look for a clog some where i really appreciate your help

 

The first thing to do is check for a restriction in the cooler circuit. It could be a pinched line or a plugged cooler. If that checks fine then the bypass valve is either stuck or failed.