Torque Converter

Petro · Jun 2, 2012

To make a long story short im pretty sure my Torque Converter took a sh*t. Was driving to town this evening and I noticed that every time I started climbing a hill I started losing speed without my rpms moving. Well after noticeing this I leaned into the gas after the converter had locked, and every time it would hold for a second and then slip. It would shift great through all gears, just would slip when locked. Well after I got to town i noticed it getting worse. I backed out of a parking spot, put it in drive and nothing. Its just making a slight noise. If you shut it off and restart it, I have movement for like ten feet and then it just slips in every gear. No Codes, No nothing. My trans temp was 140* when this happened. Getting Super tired of working on this 5R110.

I dont really have any questions just wanted to Rant. But I guess its to be expected when you double the hp and torque it was designed to hold.

Petro · Jun 28, 2012

About 2 weeks ago I beleive I shelled out a torque converter. At first it started slipping when locked, but the trans shifted fine. Within 10 miles it began to get worse and worse until it was completly out. I had no forward or reverse and it made a small chattering noise coming from that area. Well I dropped the trans, put a torque converter in and then replaced the filter and fluid. Well After we put it back together I drove it out of the shop and let it sit in neutral at an idle. When I went to drive away I again I had no forward gears again. I had reverse on and off but then lost it completly. Well after pulling the codes I found a Solenoid B code. Well I talked to a few Trans shops and they said that maybe I had gotten some debris in my solenoids and that they are stuck so I took it in for a flush. They flushed the whole trans including the coolers, they pulled each solenoid and cleaned them and tested each to make sure they were working. Well they put it all back together, filled it up with fluid and informed me that there was 0 line pressure. So I was assuming the pump failed. Well I went and picked it up, pulled it home and begin to mess with it it a little. I pulled codes U2510 P0761 and P2702. I then all of a sudden had reverse. So now I have full reverse but still no forward gears at all. I backed it around the yard for probably almost 20 minutes thinking maybe something would open up or break lose but still I only have reverse, and periodically when I go to put it in reverse There is nothing and I have to shut the truck off and restart it and its good to go again. It has me stumped and I cant figure it out. Im broke right now and Im tired of sticking money into it. Does anyone have any Clue as to wtf is going on with this 5R? Im at a total loss. Could the pump be out but just be putting off enough to lock up the converter in reverse? Does anyone have any idea? My truck been down for almost 3 weeks and it looks like it will be down another 2 yet before i can afford to pick up another trans.

Mark Kovalsky · Jun 28, 2012

The torque converter should NOT lock in reverse. If it does the engine will stall. I think your problem is a broken pump. There is a good chance that it's the same problem for both of you.

Petro · Jun 28, 2012

Ya I already commented over on the nation and explained that a little better. I dont really feel like retypin it over here.

Mark Kovalsky · Jun 29, 2012

As I explained over there the facts here are very confusing. They are mutually exclusive, i.e., not having any line pressure, but reverse works sometimes. Those two together are impossible.

Petro · Jun 29, 2012

Well Let me start over. When I went to pick it up, there was zero line pressure and ZERO movement. It wasnt until after I got it home that I regained reverse so Im assuming I somehow just gained line pressure. I dont know how or why but it happened. So now that I obviously have line pressure, or at least enough to activate reverse why do I have no forward movement? That would have indicate that I also have a solenoid problem correct? or not? O does this all come back to the pump somehow? Im explaining this the best way I know how.

Mark Kovalsky · Jun 29, 2012

I don't know what's wrong with it. The facts don't make sense to me.

Petro · Jun 29, 2012

Mark Kovalsky said:
I don't know what's wrong with it. The facts don't make sense to me.

Well thanks for trying I guess. I just posted it like its happening. Ill post back when I figure it out.

Pizza pig · Jul 2, 2012

have you looking into any possible wiring issues?

Petro · Jul 3, 2012

Nope not really

Pizza pig · Jul 3, 2012

I would look into it, ive seen some really weird stuff happen with a bad harness. Have you looked into the EPC solenoid? Are you still getting codes? Ive seen a failing pump have the same symptoms you're experiencing.

Petro · Jul 3, 2012

pizza pig said:
I would look into it, ive seen some really weird stuff happen with a bad harness. Have you looked into the EPC solenoid? Are you still getting codes? Ive seen a failing pump have the same symptoms you're experiencing.

Which is the EPC solenoid? And is it possible for it to be a pump if reverse works fine 95% of the time and it takes more pump pressure to run reverse than forward gears? I m goin to be honest, I havent looked at the truck since Saturday, I got tired of working on it and just had to walk away from it for awhile.

Pizza pig · Jul 3, 2012

Petro said:
Which is the EPC solenoid? And is it possible for it to be a pump if reverse works fine 95% of the time and it takes more pump pressure to run reverse than forward gears? I m goin to be honest, I havent looked at the truck since Saturday, I got tired of working on it and just had to walk away from it for awhile.

The EPC solenoid is not accessible without removing the solenoid body (Its underneath). I highly suggest you hook up a line pressure gauge to the test port and see what line pressure it doing at all times, this has always helped me diagnose. I have one that I can lend you until you get it figure out.

I would think if the EPC solenoid was bad you would get a code for it, but you never know. I dont believe that reverse calls for more line pressure to engage than forward gears, but I havent run my gauge in a long time to confirm this.