Recent content by roachslayer

Quick update for any future readers looking at this thread. @LeakySeals, the hoses were in terrible, degraded shape. Main hose would collapse after cool down. All hoses were nasty on the inside. All looked to be original, never replaced, 200k miles. And like I said, the coolant also looks like...

Never did figure out what was wrong with the transmission. I was warrantied a replacement unit and all issues are gone. Funny, the shop tried to blame everything on me, my vehicle, my mechanic, even my ECU, etc. Nope, something went wonky with their build. My guess is it was either a bad...

The trans shop did not do the labor, they only warranty their parts (t-converter and transmission), and they required a new cooler, bypassing the old, and recommended DEX-III or equivalent. I made the call to put MaxLife DEX-III/VI compatible fluid in. I had a different shop do the labor and...

Sadly, this is still unresolved. The transmission shop looked up the p0894 code and of all the resolutions for it, they saw the ECU/PCU was listed. So naturally, being the only thing on the list that is NOT the transmission itself, they pointed at my ECU to blame so as to avoid any...

@stanlee thanks, good to know. I remember checking it before and after I detected the flare, while hot, but not after driving several more miles to the shop... so if it was a purging issue of fluid not getting into some place it was needed right away, that could make sense.

Thank you all for the comments. The flare mysteriously disappeared, apparently. The shop that did the rebuild has my Suburban and said they could not detect a flare (after a test drive). So I came to the shop and rode with them, taking turns driving. Indeed, the flare is gone, at least for...

Thanks for the ideas folks. I will check line pressure next. @clinebarger I am guessing this means you are suspecting a flaw in the rebuild somewhere? FYI, it locks perfectly fine in gear, it shifts ok when going easy, but when pushing a bit hard (not WOT, but still pretty heavy acceleration)...

I just put in a newly rebuilt 4L60e in my 06 Chevy Suburban - all kinds of excellent updates, including Borg Warner clutches, aluminum pistons, updated TCC regulator valve, and much more. Filled with MaxLife ATF, and it has a Hayden 679 cooler (bypassing the radiator). ... and yet I'm getting...

@SteveSRT8, I'm not blaming Dexcool so much as I am blaming neglect from prior owners. This is 13 years and 200k miles without any fluid change. Way out of spec. @Dave9 In all the posts I've seen elsewhere online, nobody has mentioned black or waxy. To your point, I am not the only person who...

UPDATE: There is NO oil in the coolant. Screw opinions, I took to SCIENCE. Lab tested the coolant, found no oil at all. The issue is: -High iron corrosion in coolant -Heavy magnetic precipitate Apparently, this caused BLACK dexcool rather than rusty orange. Weird. But the issue is not...

Yep, I've got new hoses and thermostat ready to put in once the flush issue is figured out. My overheating isn't likely thermostat related though, as I physically tested it in hot water, perfectly operational. @Gimpy1, the issue doesn't seem to be oil, but rather, wax. Degreasers just aren't...

Thanks, I will do a pressure test. In the meantime, here are other coolant related factors: The coolant didn't seem low as if it's been leaking out No physical signs of leak The radiator hose collapses flat once the system cools down. Regarding that last point, to me it seems this means it...

@atikovi, I forgot to mention, yes, overheating is the problem, even when little or no load, without a trailer. @Chris142, yes, transmission cooler in radiator. Already tested and not leaking according to radiator shop. Also I dunno what purple power is. @demarpaint, citric acid has no effect...

What would cause a wax like residue to coat the entire coolant system, reservoir, radiator, engine, etc? I've got a black waxy residue that will not flush out. Another interesting characteristic is that the solidified residue liquifies when heated and floats to the top like oil. But goes solid...