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Showing Visitor Messages 1 to 10 of 496
  1. zephyr74
    Yesterday 01:15 PM - permalink
    I can't thank you enough for your advice. Yes it is a 4X4. Since it flowed more than a qt in 15 seconds that means the cooler isn't plugged (as you stated) but is it a possibility that the cooling fins of the engine radiator are clogged with dirt? Some of the fins are dented but not overly damaged. Should I try hosing the radiator out from engine side towards the bumper with a garden hose? The engine coolant temp (according to my scan gauge) is around 200 or 210 I think when the trans temp gets to 245. I havent ever noticed my coolant temp getting way hot.

    I understand the 4wd low option. Any thoughts on an aftermarket fan?
  2. Mark Kovalsky
    08-02-2015 09:37 PM - permalink
    Mark Kovalsky
    Is it aq 4x4? If so you can reduce the trans temp by making the climb in 4x4 low. Getting to 245 isn't bad for the trans, it can take that and more. If it gets much hotter, that would be bad.

    You might just still need more cooling. If it flowed more than a quart in 15 seconds the cooler is not plugged. I've heard of people installing a water tank to spray water on the cooler when things get hot. That should bring the temps down quite a bit.
  3. zephyr74
    08-02-2015 06:54 PM - permalink
    I just did the 15 second bucket test. It flowed well over a quart in 15 seconds. Now what are your thoughts? New engine radiator? A secondary cooling fan?

    Thank you,
  4. Mark Kovalsky
    07-31-2015 07:41 PM - permalink
    Mark Kovalsky
    A new engine radiator might be the fix. I didn't say it wasn't. I did say flushing the radiator won't fix the trans problem, unless you were flushing the transmission portion of the radiator. And I'm sure you were not.
  5. zephyr74
    07-31-2015 02:38 PM - permalink
    Yes, there is a line the runs out of side of transmission, into radiator, out of radiator and into 6.0 cooler, then back to the top side of transmission. I will try the 15 second bucket test next.

    So, putting a NEW engine radiator wouldn't be an answer to fixing this transmission overheating issue? I am at my wits end. my transmission shop said to maybe try putting a new radiator in or changing to synthetic fluid. But I have already spent $ on them rebuilding it, and putting a 6.0 cooler in it. Thanks again.
  6. zephyr74
    07-31-2015 02:06 PM - permalink
    WOW, thanks for the quick response. I tried shifting to 2nd but the temps still were high. I can try seeing what 1st gear will do next time.

    A restricted cooler circuit, can you explain that? I did put on a 6.0 cooler not too long ago with no change in temp, as it still gets hot. I think the transmission shop tested for leaking bypass valve, but I will confirm. Is that doing the 15 second test in a bucket and measuring at least a qt? And what do you mean by radiator cooler in the cooling circuit? Sorry I'm not familiar with this.

    And, is it worth trying to replace the radiator with a new one? I just flushed it a 500 miles ago and the trans is still having overheating issues.
  7. zephyr74
    07-31-2015 01:25 PM - permalink
    I NEED your advice. Long story short. Im original owner, 2003 F250 CCSB 7.3ltr auto. Ford replaced trans at 30K and 80K under warranty for overheating and puking fluid and throwing a code. Then at last year at 120K it did it again. I had a shop rebuild trans. Next trip I took, towing atv trailer on steep paved winding road it got hot into the yellow. Shop couldn't find anything wrong. I then did 6.0 cooler, had ford flush trans and it still gets into yellow on steep winding roads (less than 30 mph) even without towing anything! I have scan gauge and hottest it got was 247 briefly. but it goes from 220-245 pretty quick and back down depending on my throttle. This was with OAT 75-90 deg. ANY thoughts? I left a lot of little details out due to size of message allowed.

  8. Dion LeBlanc
    07-28-2015 12:27 AM - permalink
    Dion LeBlanc
    Will do. Sir and thank you
  9. Dion LeBlanc
    07-27-2015 03:03 PM - permalink
    Dion LeBlanc
    Mr. Mark, i have a 2006 F-250 SD 4x4 supercab. The tow-haul blinks, it won't go into 4 and 5 unless i get it to around 55 put it in neutral turn the key off and back on then quickly put it in D then the RPMs go to 1.5 to 2.0. I followed your advice on one of these post which i think your great.I changed the TFT sensor and i thought it helped but was wrong. The fluid in the transmission was fine and there were NO metal shavings in bottom of the pan it was clean fluid. i swap the filter unplugged the battery touched the (+) and (-) together to drain i still have to cut the key off and back on to get it into the higher gears and then when i stop it crawls up to speed from a dead stop at the light like it's still in the high gear. When i park and then try to drive after i come back out on occassion it will wind up the rpms then slam into the lower gears. I would go to a Mechanic but all to often i hear their favorite phrase to say "It will cost more to fix it than it's worth".HELP YODA!!!
  10. jpgale
    07-21-2015 11:57 PM - permalink
    Thanks that was the way I was leaning, such a stupid rookie mistake to make.

About Me

  • About Mark Kovalsky
    Former Ford automatic transmission engineer.
    SE Florida
    Flying, Antique cars and fire trucks.
    2 Letter State/Province (use "--" for outside USA/
    Econline or E-Series
    Current Mileage
    125,000 - 149,999
    Miles per year
    0 - 999
    2002 E350
    Engine type and displacement
    60 foot time
    1/8 Mile ET
    1/8 Mile MPH
    1/4 Mile ET
    1/4 Mile MPH
  • Signature
    Former Ford Automatic Transmission Engineer 1988 - 2007

    “The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson


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  • Last Activity: Today 09:38 PM
  • Join Date: 08-13-1999
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