Hey guys so the tranny acted up acouple weeks ago after a good work out pulling 7k lbs of modrone fire wood. A week after the wood job when light on the throttle going from 1st to second it hunts in and out of second untill speed changes or I increase throttle. If I keep it busy with more throttle is shifts normaly maybe alittle sooner than usual. Its not burning the fluid at all and other than that lockup and everything is normal.

I took it to the tranny shop and they found two codes one was for charging system low and the other was something unknown, I will post the codes later when I find then again. They were thinking maybe the gov pressure solinoid. And they were thinking the low charging system was making it act up, that sounds like BS to me. It still starts perfectly normal and the batteries come up to voltage after a startup the same as always.

 

reset your APPS

 

Did it twice

Heres the codes it threw,

P0234- overboost I get that all the time becuase of the turnbuckle
P1693
P1682
P1693

That last 2 they said were tranny codes.

 

p1693 is a code stored in the pcm that cannot be read by the odometer window check. It takes a full on scanner for that one.

 

They all were done by a full scanner. And the odometer code check isnt on a 99

 

oh yea...forgot about that with the 99...wait...1693...I retract my statement...I don't quite remember.

 

https://www.dieselbombers.com/codes.php

MAy need a hard reset of the apps George

DM

 

P0234- overboost I get that all the time becuase of the turnbuckle

You need a boost fooler

 

p1693 DTC Detected In companion Mode, What the hell is that?
P1682 Charging System Voltage Too Low, could this just have been throw whe the grids were cycleing in the morning?
P1693 Again ^^^
Then overboost code but thats nothing.

How do I do a hard APPS reset? I was thinking its the apps also but I did a reset and nothing.

 

Actually that can cause a lot of problems. With our trucks having several computers on board trying to communicate with each other a split second low voltage condition will cause havoc. I had an issue with my truck not charging properly and it was causing all kinds of problems like erratic shifting, security system wouldnt let me in the truck, and the vanes on my turbo would open and close at random while cruising. Turned out to be a bad cell in one battery that would intermittently draw the system down. The Allison learns how to shift the truck according to driving habits and when the voltage would drop the computer would reset the TAPS and it would start shifting crazy.