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[x Madmax Diesel]

I am posting this on this forum because I am looking for some real ideas, every where else they just say call the builder etc. I will on monday when they are open. I'm looking for Ideas so I dont call and sound like an idea when and have them tell me theres nothing wrong with it when i know there is. I just dont know what is wrong, but i know the symptoms. I think i have 2 different things going on. First things first I am getting p0741 every now and then. Heres what I've seen though my TC does not lock up hard in 5th like Ive heard from many many people will happen.. I get a very very slow duty cycle ramp up. like 13.5 > 15.3 > 17.2> 20.1> etc. I can feel that the TC is not locked when Im in over drive, unless Im steady on the fuel pedal. Other wise It takes about 20 seconds to get to full not and any let up on the pedal starts the ramp up all over again i think.

It would really help if i could post a log, I can watch all of these pids with BBL but when I try and record it will stay stuck on frame 3 and doesnt actually save the log file...

The other problem, what worries me most. Ive noticed if i come to a stop quickly the truck will downshift from 2nd to 1st VERY HARD and sometimes skid the back tire. Stop slowly and it seems fine. The first 1>2nd after truck startup usually hangs up and is kinda hard. about half the time when I go form any gear to R it is a very fast transistion and bucks the truck back, going to drive or any other selections it is all fine. I'm afraid that the tire skiding has already done the damage to my brand new trans (gmax6 + ML TC)

The guy told me a valve was sticky when he did the build, maybe that same valve is hanging up still? Thing that kills me is I told these people taht I was having TC problems before and was worried that a reg build would not fix the problems i had in the past. Said they would look every thing over and inspect everything to make sure its in working order before the trans was put back together, that made me feel pretty good. I guess they looked over a few things?

No codes that i think explain the tie up that skids the tires and makes a hefty clunk. I do get a p0741 code which seems to be caused my slippage over 80 rpm for a couple seconds when the TC is supposed to be locked.

Any body have any ideas? :(

[Diesel Tech]

For a test the first thing to do is retune the engine to stock tuning and see if this changes the issue. I would also change the spin-on transmission filter. Take the old filter and cut it apart and see if there is anything in there. If the old filter has debris in it then I would call it a day and head back to the builder. Take the filter to show them as well.

[x Madmax Diesel]

Thanks for your response (Steve is it?) I'll go and change out and cut open the filter. Called the builder and thought it was electronic (that my co pilot was the problem) and suggested I rid of it and maybe replace it with one of there one lockers... Its stock trans tune, but why would the ECM tune have anything to do with it? I know that will rule it out but I'm not seeing your math how it could effect it.

[x Madmax Diesel]

Well my fuild is pretty metalicy :( I told them that I was also having problems with going into reversve smoothly. If I put it into R from N without my foot on the brake the truck will jump back probably 3 feet and then return to idle. If i do the same goin to D its nice and smooth. The bucking in reverse is not something that happenes always, kinda depends on if its been drivin that day or not. Likes to happen when its cold I guess... When I told them that they blamed that on the co pilot reverse solenoid block saying thats a common complaint about the co pilot, I told them that I do not have the solenoid block hooked and he no longer had an idea of why it was happening. He thinks i need to have a tech II reflash my TCM even though it is still the stock tune in the TCM. anyways does this sound like some type of checkball, valve related problem? maybe a clutch clearence issue? Anyways heres the pics of the trans filter, and fluid after Id say just shy of 1,000 Miles on it. Ohh and you can see metal pretty good in the last pics where I was sloshing the bucket around.

I was told that the valve body would get a full inspection to make sure everything was working properly before being put back together, which is something I wanted tehm to do because I was not sure if something was broke internally in the old torque converter or something else in electronically that was causing it to drag... So I felt pretty good about them making sure everything was in working condition before being reinstalled. But I think somehting is mechanically not right with the valves or somehting and not electronic. Just really sucks when I spent almost $5,000 and now I have clutch material all intwined in my new Fuild.

http://i628.photobucket.com/albums/uu6/MadMAX_DIESEL/DSC03667.jpg
http://i628.photobucket.com/albums/uu6/MadMAX_DIESEL/DSC03668.jpg
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http://i628.photobucket.com/albums/uu6/MadMAX_DIESEL/DSC03670.jpg
http://i628.photobucket.com/albums/uu6/MadMAX_DIESEL/DSC03671.jpg
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http://i628.photobucket.com/albums/uu6/MadMAX_DIESEL/DSC03673.jpg

[x Madmax Diesel]

http://www.dieselplace.com/forum/showthread.php?t=295128&highlight=fix+hard+shift
Found that I'm not the only person with troubles. They think it is the ECT sensor :confused::confused::confused:

[Diesel Tech]

The ECM tuning can and does effect the transmission. The ECM and TCM talk to one another but each only has it's half of the conversation to work with. So if the TCM tells the ECM it wants a torque reduction it looks up how to do that in the ECM. So putting the stock tune back in place takes that issue away for testing. The stuff in you filter doesn't look so good! I think I would be back to the transmission builder with filter in hand to have a little heart to heart meeting about it.

[x Madmax Diesel]

I sent them an email about it. Just kinda sucks that I'm 3 hours away otherwise I'd be there right away

[neversatisfied]

Does the reverse jump only happen after you first start the truck after sitting a while or does it happen more often?

[x Madmax Diesel]

Yeah it mostly does it after it sits for a bit, sometimes warm but not usually. I did find that the drive engages in 2 small steps it feels like, I hear the engine get a small load on it then it I can feel it totally engage. I can deal with the drive, it was unnoticable unless you really pay attention. As far as the Reverse heres how it feels. You put it into R then it has about a 1 second pause then finally goes pretty stout too.

[S Phinney]

How did the magnet look? I would take it back also. Metal problems don't get better.

[x Madmax Diesel]

Well I would have to go to the dump to see whats on the magnet, appearently my truck doesn't have one. Guess some retards at GM threw it away with an older filter of mine because the builder said it didn't have one when he got it. I talked to the builder and he said bring it on up and he'll take alook.

Anybody know the GM P/N for the spin on magnet?

[Mike L.]

OK
You have been on every forum so far posting your problems. Which kit was installed and who built it?

[hondarider552]

Brayden built it.

[Diesel Tech]

For the magnet go to Allison and get one, they are much cheaper than GM for most all Allison parts.

[OTHRGRL]

I supplied the PI ML converter - a SC GMax-6 was installed (not sold or installed by me). The metal is not looking good and I would be going all the way back through the trans. The GMax kit comes with a magnet and your builder should have dozens on the shelf regardless - you don't build a trans and put it back together without a magnet, there's no excuse for it. But the magnet isn't even the issue, there shouldn't be all these symptoms and all this metallic material - there is almost certainly something wrong internally.

[x Madmax Diesel]

I will be taking it back to them soon and get this resolved brayden sounded like he wants to get this fixed pronto, he is the person that i will be talking to from now on there. other employees I spoke with blamed the co pilot right way and said they are known to make trucks shift into reverse hard and a bunch of other problems too

[RickDLance]

I expect Braden will take good care of you. :)

[x Madmax Diesel]

Just an update, I got it back this saturday and its working good finally. brayden thought it was the TC coming apart so they sent it in to P.I. to have it cut open and checked out. They didn't see anything wrong with it so they welded it back up and sent it back (kinda thought I would get a brand new one) anyways, It must have been in the tuning or something.The co pilot has been off since so maybe that was the problem... Idk but I'm just glad that it works finally