I have an 02 d-max with the allison in it. I have recently been pulling heavy loads including a 10 ton trailer wiht a 15,000lb lift on it and have been pulling 20ft. chopper boxes loaded. Recently it has been leaking trans. fluid but no one seems to know where its coming from. Took it to the dealer and they told me it was comming off the vent. But now tranny temp gets warm and when i pull something it goes into the 210 to 225 temp range and runs in the high 100's durring normal driving. If anyone has any ideas on what is going on please help the local dealers tell me theres nothing wrong and untill the check engine light comes on theres nothing they can do. so any help or ideas would be greatly welcomed.