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05 2500HD 6.0L 4L80e Transmission Overheating after this brutal Winter!

Discussion in 'Chevy Trucks' started by midnightrun7, Jun 2, 2014.

  1. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    First I'd like to say hi...Newbie Here.

    I have a 2005 Chevy Silverado 2500HD 6.0L 4X4 - 4L80e Tranny w/70,000 Miles
    Great Condition.

    Never had a problem with this truck until this past winter, Brutal! I pulled an engine code P0894 (Component in Transmission Slipping). I dropped the pan and change the Transmission Filter and installed Dex VI about 6 quarts. Cleaned the filters in the valve body, change the TCC Solenoid that controls the Torque Converter and put it back together. It didn't help, the truck was still overheating with no load or towing and the Torque Converter wasn't locking up. It started getting hot when the weather got warmer and didn't have a problem while plowing this winter (Was very cold)

    I took it to a mechanic and he installed a new Converter, I had lockup but was still getting too hot...over 250F just driving 5-6 miles or just idling in park.

    I left the truck at his shop and he's supposed to work on it today. Yesterday, I went there to check a few things like the radiator, ext cooler and lines. The cooling line on the drivers side top of the radiator was very hot after driving it. The Hose (engine) next to the line was hot of course. The lines to the cooler were outside temperature, not hot at all. The line on the bottom drivers side was touchable and the line on the passenger side top and bottom weren't hot at all. Seems like fluid is getting stuck in that area and theres no circulation. Wish I had a diagram for the cooling lines of the Tranny. Anyway, I'm thinking that maybe the radiator or lines are clogged.
    Maybe some torque converter material stuck in there.
    I think the lines and cooling system should have been taken care of before the TC was replaced.
    Anyone have this Problem and if so what was the fix?
    Thanks-
     
  2. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    If it was my truck I would have replaced the trans, convertor, and flushes lines. Factory cooler gets bypassed for a new one when replacing transmission
     
  3. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,924

    Are you talking the trans lines or the coolant lines?
    What you could do is remove the trans lines at the external cooler and blow it out and see if anything comes out.
     
  4. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    Transmission lines, thanks

    I know I should have replaced the transmission, however, the thing was shifting perfect...except for overdrive and overheating.
     
  5. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    Have someone bypass cooler and put new one in. They're cheap

    Sounds like you have a plugged cooler. Exact reason I've never replaced just a convertor lol

    Everything internal in that trans can be verified with a scanner and compent tech
     
  6. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    Finally Getting Somewhere...

    My Mechanic bypassed the cooler and the radiator, I'm not sure which one first. I think the cooler. We ran the truck in park for about 20 minutes and drove it for about 20 miles, in traffic and side roads. The transmission temperature did not rise fast and did not exceed 220 degrees, which is still too hot on an 85 degree day. It stayed a little below 200 for longer than the past 2 months or so and no codes. Prior to this, the Temp would come closer to red-line. He's ordering a Radiator in the morning that comes with a Tranny Cooler and Oil Cooler. Hopefully this will get me below or around 150F.

    Question, should I insist that my mechanic flush all the Fluid out again?? Currently I have Dex VI and Dex III in there, is Red and Not Burnt. It seems he's the type to want to save money for his customers...lol I just want it fixed rite. I figure I'm ahead of the game if my tranny holds up, so far so good and was shifting fine today.

    I'll stay posted and let all you gentlemen know if it was the radiator for sure.
    Thanks for the replies.

    :mechanic:
     
  7. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    I would flush it before he puts the radiator in.

    The cooler is part of the radiator
     
  8. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,924

    Don't forget the new cooler in front of the rad too
     
  9. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    I just called in...

    Whiffyspark
    He mentioned that we had the pan down 3 times which is true. I took it down and replaced the filter and added about 5-6 quarts. I pulled it down a second time and changed the TCC solenoid and he pulled down the pan and checked all the solenoids and added another 6 quarts and 4-5 more with the converter. However, the first and second time the Torque Converter was not the new one. On the 2th hand now the filter in the Tranny should be catching the crap that's in there, shouldn't it ?? IDK I wish he would just do it!

    dieselss
    The new Radiator comes with the Oil Cooler, and Tranny Cooler.

    I don't know!
     
  10. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,924

    External cooler. In front pass side
     
  11. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    Have him flush it with a trans machine. Put a new filter in after if you're worried about it.

    We never do filters just flush it. Changing the fluid in the pan doesn't do much good for all the crap in the lines and cooler
     
  12. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    I got the truck back. He change the Radiator (only) and used some blue coolant (Universal he said) not Dex III that looks like dirty water. I wouldn't be surprised if he kept my coolant to sell to another customer. He didn't change the passenger side external A/T cooler or blow it out, un-f*cking-believable! I have a mix of Dex III ATF and Dex VI in the system (New and Old).

    The Problem was the Radiator and the Convertor. It's running at about 100 degrees above ambient temp. About 170-180F - Still too hot with no load.

    First thing tomorrow I think I'm going to flush out everything, Coolant and Transmission. Take out the External Cooler and replace it.
    I just found out he doesn't have a Flush Machine. Needless to say I was very pissed. This guy won't be in business too long.

    This is bitter sweet because the transmission shifts good and it's not going up to 270-280F like before. But now I need to get the Fluids flushed, I told him to change, all over again.

    Do you think I should drop the pan and change the Tranny Filter again too or am I over reacting with this cluster-F*ck

    Thanks for all your inputs and replies.
    N-
     
  13. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    I'd have it flush. It's up to you if you want to change the filter. Can't hurt

    And yeah 180 is still warm.
     
    Last edited: Jun 3, 2014
  14. midnightrun7

    midnightrun7 Junior Member
    from 12540
    Messages: 9

    Yes, I'm going to have done.

    I am so P.Off - I never told him to add that stuff. I didn't say "Please save me money and stick dirt in my radiator" Just venting, sorry!

    Would you recommend taking it to a dealer?
     
  15. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    No just a regular shop is fine. Even mr tire has the machines. I think it's $180 to have trans flashed. Can't remember what we charged for coolant.

    I was a tech for almost 10 years.
     
  16. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    And you don't actually need dex coolant. Dex is known to cause issues because it is so damn corrosive. The 3.8 engines had ALOT of problems because of dex