I did my due diligence and searched these codes in here and on google (what a bunch of odd balls out there) anyway codes p0843 p0734 p0732. I understand possible t case speed sensor, but what about the p0843 code? Heres the story on the truck, it sat for a while and then i put injectors in it (lb7) ran great and gave it back to the customer and after a month or so he brought it back to me and said the tow haul button isn't working right and said it showed range shift inhibited. Well i put a mew gear selector in cause the wiring was rubbed through and broken and that fixed the tow haul button. Drove it and ran it and all seemed fine. He brought it back and said its doing it again.... I said ok well tow haul works fine, but then he said no the shift inhibited message. So i drive it and all is fine then after about 30 min of driving shit hit the fan and it was flaring in between shifts, free revving, clunking and hitting hard into shifts, also like dodnt want to get up an go. So then it went into limp mode. Well ding ding something is goofed up. Anyhow looking for a little guidance here. Should i log all the trans sensors and see if something pops out at me as far as an electrical discrepancy? Or would you guys lean towards a mechanical problem and just dive into the pan? I do have an ATSG manual, and will hook it up to a better scan tool than efi live tomorrow. Thanks!
Allison 5sp: Some 5 speed problems...
- Thread starter C.bowles2
- Start date
As someone who is slowly being surrounded by wannabe diesel repair/performance shops that can barely use a hammer and a pair of pliers I gotta say this.....
If he's a "customer" that means you shouldn't have to come on here asking for basic help like this. Your charging someone for your quote on quote "expertise", and yet you come on here for free help......
I don't mean any offense to you personally. But I'm so sick of posts like this.
At least do a little of the work yourself. Pull the pan and check the filter. Log the tcm with a good scan tool. Check wiring. Etc......
Now once you post some more info I'm sure plenty will actually be able to help you. Myself included.
Sent from my SM-N920V using Tapatalk
If he's a "customer" that means you shouldn't have to come on here asking for basic help like this. Your charging someone for your quote on quote "expertise", and yet you come on here for free help......
I don't mean any offense to you personally. But I'm so sick of posts like this.
At least do a little of the work yourself. Pull the pan and check the filter. Log the tcm with a good scan tool. Check wiring. Etc......
Now once you post some more info I'm sure plenty will actually be able to help you. Myself included.
Sent from my SM-N920V using Tapatalk
An this is why I even hate to ask for help on here. Seems as if you don't have 9000 post or something they don't want to bother with much help anyway. Why can't people really keep their opinions to their self. It's a forum for help.
There is a difference in doing all the diag you can, spent lots of time on it and asking here for help cause your just flat out at a loss compared to running the codes, Google searching, and asking us for help without actually looking into it further.
He's getting paid for a problem to be fixed, we are not.
Well you are wrong here. Too many wannabe so called builders come here for help while they are selling trans rebuilds to customers for big money. Problem is they don't know shit and want a magic wand to fix the problem.
As far as not having 9K posts and not getting help here; YOU are full of shit. Show me somewhere where someone was not helped without a big post count. Just because you may have some inabitions asking for help because you are shy or whatever, don't post this bullshit here.
Now to answer the OP.
732 and 734 are rare trans codes and I don't see them very often unless there is a output/ turbine speed sensor problem. The 843 code indicates that the TCM/ PSM have mixed up messages and cannot function together to command the next shift.
Wow, ok. I used to do this for a living on a daily basis in a gm dealership, and multiple independent shops, and was damn good at it also... Electrical diagnostics that is, and general repair. This was in full blown shops, with mitchell, all data, GM SI, identifix, tech 2, snap on scan tool, ford IDS, autel scan tool, oscilloscope's (yes reading electrical wave patterns to diagnose vehicles ) and almost every resource available. Most of my time was spent at independent shops, where we worked on every manufacture... I dont know if you know this or not, but every vehicle does not run diagnostics the same as a GM duramax.... The one shop was a full blown electrical diagnostics shop where shops around the area brought us many interesting issues they couldn't decipher that would make most techs pull their hair out..i learned a lot working with the owner of this shop.....A technician is only as good as his tools and resources...... Ok with that said sorry i made it seem like i am in this business for my self, by "customer" i mean a friends truck that im gonna help him get back on the road in my home garage, because im nice, and will save him some headache and cash (no good duramax techs in my area) and i will make a little bit of side money. This is a bit of a hobby of mine.... So let me break this down for you i am not a trans builder (dont want to be, and dont claim to be) if it gets that involved it is beyond my resources for my home garage without a lift...so i send him to someone reputable. Let me break it down for you further.... So since im in my home garage and no longer do this line of work for a living im limited to my resources available to me, (just a efi live scan tool, which is garbage for diag) no access to good vehicle specific schematics, basically in the dark with no flash light. So instead of me toting my ass down to one of the shops i used to work at and take time away from their jobs that are making money for their families, your damn right im gonna go to an OPEN forum and ask a couple so called simple questions to you self proclaimed duramax gods that obviously have enough free time to sit at a key board or phone when they could instead be out changing the industry themselves but apparently they already know everything. Because from what im getting is you want me to go out and spend thousands upon thousands of dollars on diag equipment just to help a friend get his truck back on the road... This isnt no hopped up diesel truck, just a guy wanting to use his stock truck for what he bought it for. And not everyone is filled with boat loads of cash especially after already dropping 4k into the injector job I did, so sorry if he wanted to see if i could help him out first. Like dont you realize your dealing with people on the internet??? Where most dont have the damnedest clue nor the money to pay someone, so they turn to these forums for help. Your ridicules.
Sent from my iPhone using Tapatalk
Thanks mike. Much appreciated, just that little bit of info will enable me on how to attack and diag this issue. As the saying goes "if you know how something works, you can fix it" and unfortunately i dont have much available to me to show me how this electrical circuit works and how things are communicating
Sent from my iPhone using Tapatalk
I told u if you need anything to let me know. I have access to a snap on solus and a full repair shop.:thumb: