6.0 high egts

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May 7, 2025 | 12:36 PM

#16

kbeefy

Cargo Master

Joined: Aug 2003

Posts: 2,332

Likes: 442

From: Eastern Washington

Quote:

Originally Posted by TRMK

Weird thing is to me is if it stays in 5th with the converter Locked up it stays cool, if it downshifts it heats up. That’s backwards of how I always thought it should be.

I have an 05 I recently started towing with. I have an SCT tuner and the canned tunes.

I haven't let it get over 1300*, and only for an instant when I wasn't paring attention, but I have noticed what you mention above.

I can be pulling a hill (towing 11k) and when it gets to 1100-1150 I want it to downshift. Well, theres no way to manually disengage OD on my truck so I either back off or stab the throttle a bit to get it to downshift. This gets me about a 900 rpm gain and increased EGT's. I have to slow down a bit (to 55-60) and let the EGTs settle down.

I believe it is both down shifting and unlocking the converter at the same time, netting the 900 rpm gain. Typically from 1900 rpm to 2800 rpm.

I know that while accelerating through the gears I will be reading 1900, 2200, and 2800 respectively at that speed depending upon what gear or converter status is.

I haven't came up with a fix, but I was planning on addressing the shifts with some custom tunes.

I did try stock, tow, and aggressive shift options on the sct, no change.