Hello everyone. So, I'm trying to figure out just what in the heck is wrong with my truck. This issue just started happening out of the blue yesterday. Its been perfectly find up until then. The truck has 140,5xx miles on it.
I pulled out of my drive to go finish up a side job for a buddy of mine and the 1-2 shift didn't seem right. It seemed like a rough shudder. The 2-3 shift seemed fine, but then the 3-4 and 4-5 shift seemed super fast. Just one right after another which then bogged the rpms down. That went on all the way to my buddies house. This was all with normal driving, not ripping on it or anything.
After I left there I headed back home and the 1-2 shift seemed ok, but all the other shifts seemed to happen ALOT sooner than they should. As in it was wanting to shift in to 3-4-5 at 30-40mph. If I went to give it gas to get it to down shift it downshifted but then wanted to shift right through the gears again super fast and between the 3-4 the rpms raised in between the shift, like a surge.
I changed my spin on filter with a OEM filter, along with my new fuel filter, water sensor, engine oil and filter last night after all this started.
Its not throwing any codes yet, so I don't really know what I should do, and whether continuing to drive it will hurt anything. I took it by a buddies house that owns a diesel shop here in town where we live, and of course when he went for a ride it shifted perfectly normal. I even got on it pretty hard while on tune #4 with my EFILive (Duramax Tuner Tunes) and it shifted perfect. As soon as I dropped him off and went to driving back home normally, it did it again.
So finally an update. It finally threw a check engine light after the truck started shifting through all 5 gears and into 5th by 30mph when leaving a stoplight under normal throttle.
We scanned it and it came back with P0700 and U0100. My buddy that owns a diesel shop did a relearn and reset tabs using his snap on modis. After that everything seemed great for awhile, driving about 40miles. Today while drive no around town you can tell it's starting to shift funny again, but I haven't driven it enough to get it to throw another light. I've heard that on the TCM's they are either good or bad. No in between. I'm once again at a loss as to what I should do!
I have crawled all over checking connections, grounds, etc. Even tried a different TCM and that didn't fix it. It actually seemed to make it a lot worse. I've been fighting this almost 2 weeks now, and can't find a solution. If anyone has ANY ideas of anything else I can do/check I am open to it. I'm just trying to avoid having to spend big money taking it to a shop.
Thanks in advance!
I pulled out of my drive to go finish up a side job for a buddy of mine and the 1-2 shift didn't seem right. It seemed like a rough shudder. The 2-3 shift seemed fine, but then the 3-4 and 4-5 shift seemed super fast. Just one right after another which then bogged the rpms down. That went on all the way to my buddies house. This was all with normal driving, not ripping on it or anything.
After I left there I headed back home and the 1-2 shift seemed ok, but all the other shifts seemed to happen ALOT sooner than they should. As in it was wanting to shift in to 3-4-5 at 30-40mph. If I went to give it gas to get it to down shift it downshifted but then wanted to shift right through the gears again super fast and between the 3-4 the rpms raised in between the shift, like a surge.
I changed my spin on filter with a OEM filter, along with my new fuel filter, water sensor, engine oil and filter last night after all this started.
Its not throwing any codes yet, so I don't really know what I should do, and whether continuing to drive it will hurt anything. I took it by a buddies house that owns a diesel shop here in town where we live, and of course when he went for a ride it shifted perfectly normal. I even got on it pretty hard while on tune #4 with my EFILive (Duramax Tuner Tunes) and it shifted perfect. As soon as I dropped him off and went to driving back home normally, it did it again.
So finally an update. It finally threw a check engine light after the truck started shifting through all 5 gears and into 5th by 30mph when leaving a stoplight under normal throttle.
We scanned it and it came back with P0700 and U0100. My buddy that owns a diesel shop did a relearn and reset tabs using his snap on modis. After that everything seemed great for awhile, driving about 40miles. Today while drive no around town you can tell it's starting to shift funny again, but I haven't driven it enough to get it to throw another light. I've heard that on the TCM's they are either good or bad. No in between. I'm once again at a loss as to what I should do!
I have crawled all over checking connections, grounds, etc. Even tried a different TCM and that didn't fix it. It actually seemed to make it a lot worse. I've been fighting this almost 2 weeks now, and can't find a solution. If anyone has ANY ideas of anything else I can do/check I am open to it. I'm just trying to avoid having to spend big money taking it to a shop.
Thanks in advance!
