jcorvaia
TYF Newbie
Long time reader, though just signed up today.
I have a 2007 Suburban with 125K on it. For the past 15K miles, I have a random hard 1-2 shift. 99% of the time, the car shifts fine, but every once in awhile the issue arises. It took me a long time to figure out the type of scenario it happens. It almost always seems to resolve itself once the car is turned off completely. The next start (even just a few minutes) seems to be back to normal.
It appears to occur when the car is warm (been driving for an extended period) and it happens more frequently in warmer weather. Sometimes coasting or crawling along in traffic brings it on. I can feel it coming on. It not might occur for months, but then it could show multiple days in a row. The 1-2 shift is a very hard kick, 2-3 is more noticeable than usual (but nothing like the harsh 1-2), and 3-4 seems typical.
I've read various threads and possible causes/solutions. I haven't seen a scenario quite like mine (but I have not read everything). I've read about possibly replacing the TPS, or maybe repairing/replacing the valve body.
I may visit a reputable transmission repair shop in the area, but it is hard to reproduce the symptoms. Any thoughts? Anyone with a similar experience? I feel like the fact it 'resets' with turning the car off to be an important tidbit.
Thank you!
Joe
I have a 2007 Suburban with 125K on it. For the past 15K miles, I have a random hard 1-2 shift. 99% of the time, the car shifts fine, but every once in awhile the issue arises. It took me a long time to figure out the type of scenario it happens. It almost always seems to resolve itself once the car is turned off completely. The next start (even just a few minutes) seems to be back to normal.
It appears to occur when the car is warm (been driving for an extended period) and it happens more frequently in warmer weather. Sometimes coasting or crawling along in traffic brings it on. I can feel it coming on. It not might occur for months, but then it could show multiple days in a row. The 1-2 shift is a very hard kick, 2-3 is more noticeable than usual (but nothing like the harsh 1-2), and 3-4 seems typical.
I've read various threads and possible causes/solutions. I haven't seen a scenario quite like mine (but I have not read everything). I've read about possibly replacing the TPS, or maybe repairing/replacing the valve body.
I may visit a reputable transmission repair shop in the area, but it is hard to reproduce the symptoms. Any thoughts? Anyone with a similar experience? I feel like the fact it 'resets' with turning the car off to be an important tidbit.
Thank you!
Joe
