I have some somewhat annoying transmission behavior on my 2004 van, though I'm not sure how abnormal it actually is. Curious to hear from others if they notice this, and if the speed sensor cleaning (or other maintenance) may improve it.
behavior 1.
During normal acceleration from a stop, upshifts have the feeling of slipping (especially to 2nd and 3rd gears). Let's say the shift starts from 2300rpm, RPMs will drop to around 2000rpm, and stay there while speed increases, then rise again once engine speed and transmission speed match. If I step harder on the accelerator during this "not fully engaged time," engine speed drops below 2000 quite quickly, fully engaging the higher gear.
My first thought (or hope) is that this is the torque converter clutch engaging, and is working as intended. But these transmissions remain a bit of a mystery to me.
behavior 2
When coasting, RPMs drop some expected. When I press on the accelerator, RPMs overshoot, then settle into gear. This gives the feeling of delayed response, and also just makes me worried my transmission has issues.
For instance, I can be coasting at 22mph @ 1200 rpm. When I press the accelerator, RPMs briefly reach 18-1900, then drop into gear at 1500rpm.
Here's a video that hopefully shows it: https://photos.app.goo.gl/w1fAIUC6Y63aJLnP2
Thanks for any insight you might have!
behavior 1.
During normal acceleration from a stop, upshifts have the feeling of slipping (especially to 2nd and 3rd gears). Let's say the shift starts from 2300rpm, RPMs will drop to around 2000rpm, and stay there while speed increases, then rise again once engine speed and transmission speed match. If I step harder on the accelerator during this "not fully engaged time," engine speed drops below 2000 quite quickly, fully engaging the higher gear.
My first thought (or hope) is that this is the torque converter clutch engaging, and is working as intended. But these transmissions remain a bit of a mystery to me.
behavior 2
When coasting, RPMs drop some expected. When I press on the accelerator, RPMs overshoot, then settle into gear. This gives the feeling of delayed response, and also just makes me worried my transmission has issues.
For instance, I can be coasting at 22mph @ 1200 rpm. When I press the accelerator, RPMs briefly reach 18-1900, then drop into gear at 1500rpm.
Here's a video that hopefully shows it: https://photos.app.goo.gl/w1fAIUC6Y63aJLnP2
Thanks for any insight you might have!