Hey guys, for the last few weeks I have noticed my transmission overheating a bit, nothing bad, but I have just been running around town local so no drives over about 15-20 mins.

Well, Friday night I went out to see a friends band play about 40 mins away, My trans temp climbed steadily the whole way out there, peaking at 226 by the time I got out there. I kinda took my time getting home hopping bars to give the trans a break to cool off.

Did some diagnosis today, first thing I did was unhook the line going to the rear of the transmission and did the bucket flow test. I fired it up and fluid came pouring out of the line which goes into the rear of the trans, nothing really came out of the rear of the trans, it was all out of the line.

So that tells me that its getting flow through the coolers. I didnt measure the amount like some do, but I can tell you it looked like a strong steady flow.

I made sure the fluid levels are proper as well which they are, it was maybe a 1 quart low which shouldnt effect anything.

I also inspected the coolers and everything appears to be clean with no airflow restrictions.

Took it out for a brief drive again and it climbed up to 147, maybe 5 miles out 5 miles back. Ambient temp is 62 today.

Im getting multiple codes on my Edge Evo which I have had set to stock settings since I bought the truck. Codes I get that concern me relevant to the trans are P0741 and P0743. Both seem to relate to the torque converter.

I feel like my RPMs are a bit to high at highways speeds so I am wondering if I have a TC that is slipping a bit while driving.

I did notice a bit of a metallic pearl in the fluid that came out.

Aside from that I feel like the trans is shifting ok, though sometimes I have to let off the gas to get it to shift into 4th.

Im thinking I need to take it to a transmission shop to be checked out at this point. Unless anyone has any other ideas.

 

That shows that the bypass is working correctly and that the coolers are not plugged.

So we don't know if it's flowing enough or not. But we can let this go and ASSUME your pump is putting out enough flow. Do I know that it is? No.

If you say so. Others, such as me, may have a different idea of being a quart low. We can let this go, too.

These codes indicate that your torque converter is not locking. That will cause the temperature problems.

That's what I call a really bad sign.

So the trans shifts OK, except it won't shift.

I think this trans is toast, but you seem to want to keep going the way you are. I recommend having a pro look at this. You're just rationalizing away each of the problems you've found. It's your call.

 

ya i hear ya......but the shifting problem honestly feels minor, like i just barely let off the gas, not even all the way and then it shifts without any hard clunk or anything. im not really upset if i have to have the trans rebuilt. i only paid 3000 for the truck so even throwing another 2-3 in it, im still well within the price range of what the truck is worth. has just around 184k on it and everything else on the truck seems healthy. except for my one rusty wheel well :-/.

as far as levels go i added a bit much...bout 2-3 qts and it started to come out where the dipstick tube goes into the trans, so i actually overfilled it a lil bit today.

i dont really know the history of the truck, i bought it at a bank auction and it was a repo. it does have a gooseneck in it so i know it at some point in its life was towing something heavy.

the only thing i know aside from that is about a year ago the oil cooler and HP oil pump were replaced and sinister diesel exhaust system was installed. I found the receipts with dates for said work in glove box.

 

oh....and the flow volume from the tube looked like equivalent to a good water fountain