P0741 came back.
Truck still seems to be running fine.
Any other ideas, or should I start to tear this thing apart...
Truck still seems to be running fine.
Any other ideas, or should I start to tear this thing apart...
P2761 troubleshooting
- Thread starter extremecowboytec
- Start date
P0741 came back.
Truck still seems to be running fine.
Any other ideas, or should I start to tear this thing apart...
Get a professional scanner like a Tech2 and see if you can command TCC.
I'm sure you can. You will want to pay attention to command tcc and then watch tcc-slip on the screen. If the converter clutch locked properly, there will be 0 slip rpm. If so, drive it till the tcc applies; then roll into the throttle pretty good ( not hard enough to force a down shift which will unlock the converter ) and see if the rpm's stay at 0. If there is any rise in rpm's when you do this; there is a problem with either the converter, sealing rings on the stator support shaft, converter flow valve, or the stator shaft might have twisted in the stator body. The F trim solenoid ( tcc apply ) can cause this but is very rare.
Hope this helps.
Great, thank you so much. I'll do that as soon as I get this thing running again...
But now I have a different issue. Yesterday, I decided to pull the pan again, and check the TCC solenoid to see if maybe a metal shard got stuck in it, thinking that might be what was causing the code. Sure enough, there was a little piece of metal in it. So then I had the bright idea to pull the entire valve body, and check the whole thing...
Checked it out good, everything looked fine. Reassembled, and torqued the valve body back on. But now, the shifting lever is stuck in park, it won't budge at all, and when I start the truck it runs fine for about 5 seconds, and then starts to ideal rough, and the truck shakes. I tried moving the steering wheel, unpluging the TCM, checking brake switch, etc, but the lever is still firmly stuck in park.
Thanks for all the help.
There is a pin in the manual valve ( the valve that moves back and forward ) That pin must fit in the Z slot in the side linkage. It doesn't matter where in that Z slot it fits because it will find home by it self. that is your problem.
That was exactly right. Mike you're amazing
Now I'm working on the other thing
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That was exactly right. Mike you're amazing
Now I'm working on the other thing
Sent from my iPad using Tapatalk
You just dont realize just how many of these transmissions he's looked at, do you? :roflmao: Hes seen just about everything there is to see in them.
The old man knows his shit.
I'm very new to the dmax world. This is my first. But I'm still amazed lol
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Update on this tranny. I drove it all day today, (I do residential service work)
Codes: P0762, P0741 (still haven't gotten a chance to work on that one)
Randomly shifts hard. Sometimes it runs fine, sometimes it shifts hard.
Sticking in 4th. Once the truck gets warmed up, it sticks in 4th and won't come out until you let it cool down some. Won't shift even in manual mode.
Delayed shifting out of park. Esp when going into reverse.
From my research, P0762 has to do with debris in the fluid. Remember all those shavings? I didn't change the fluid or filters after that. I'm thinking that could be what is causing the hard shifting, and this code? Do you think I can get away with just changing the filters or should, should I do the fluid to?
As to the other code, I really can't work on it till this rascal is shifting decent.
Codes: P0762, P0741 (still haven't gotten a chance to work on that one)
Randomly shifts hard. Sometimes it runs fine, sometimes it shifts hard.
Sticking in 4th. Once the truck gets warmed up, it sticks in 4th and won't come out until you let it cool down some. Won't shift even in manual mode.
Delayed shifting out of park. Esp when going into reverse.
From my research, P0762 has to do with debris in the fluid. Remember all those shavings? I didn't change the fluid or filters after that. I'm thinking that could be what is causing the hard shifting, and this code? Do you think I can get away with just changing the filters or should, should I do the fluid to?
As to the other code, I really can't work on it till this rascal is shifting decent.
P0762 could indicate a sticky shift valve, mechanical solenoid failure, or a short to ground in the electrical circuit.
Ok, just wanted to let y'all know what the conclusion of this was. I took my tranny to a Allison guy here where I live, and this is what he found.
This bearing was put in backwards
It destroyed all the planets.
So yeah... Put a bearing in backwards, destroy your entire tranny
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This bearing was put in backwards
It destroyed all the planets.
So yeah... Put a bearing in backwards, destroy your entire tranny
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Thanks for the reply. Sorry I'm not the best at electrical testing. Do I back probe the trans control module running and in any certain gear? Test both the wires together or? I'll look up witch terminals these are at the connector
Just unplug tcm and test it. If you use a old headlight or something it will actually load test the wiring which is better. If you have a full tcm pinout you can get your ground through the ground pins and kill 2 birds with one stone. Otherwise ground it to the battery.
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