Slow Downshift?
Thread Starter
Intermediate
Joined: Oct 2011
Posts: 47
Likes: 0
Slow Downshift?
I notice that my 88 with auto transmission has a slow downshift when in OD going to 3rd if I'm going up a hill, or if I lightly hit the accelerator to adjust my speed just a little. It makes a noise like... The best way to describe it is if you have ever driven a manual tranmission, and push the accelerator hard at highest gear, but don't downshift.
If I push the accelerator more aggressively, I can force it to downshift.
Transmission shifts fine under normal or even hard acceleration.
Any thoughts?
If I push the accelerator more aggressively, I can force it to downshift.
Transmission shifts fine under normal or even hard acceleration.
Any thoughts?
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I was thinking TV cable adjustment...
You could benefit from an increase in pump pressure. It's a pretty simple modification and GREATLY extends the life of your transmission. That said, it sounds like your clutches are burned (see previous sentence...). You didn't mention your odometer reading, but I think your trans needs a rebuild. I suggest taking it to a trans shop (or two) and having it evaluated.
You could benefit from an increase in pump pressure. It's a pretty simple modification and GREATLY extends the life of your transmission. That said, it sounds like your clutches are burned (see previous sentence...). You didn't mention your odometer reading, but I think your trans needs a rebuild. I suggest taking it to a trans shop (or two) and having it evaluated.
Instructor
Joined: Nov 2011
Posts: 183
Likes: 0
try un hookingg the conector on the trns for the lock up then drive it if it run smoother hook it back up either get a lock switch that rasies the tcc apply speed or have a computer chip installed the lock up converter engages at a low speed causing the symptoms your describing
Intermediate
Joined: Nov 2023
Posts: 32
Likes: 11
I have same exact symptoms. Shifting up is ideal, smooth, in time, but shifting down, especially from 4th is late/slow and car makes low pitch noise unless I press gas pedal quick to force downshift. TV cable adjusted. Any ideas? 118k mileage
EDIT: I just checked TV cable adjustment and I have weird case. I press D button and move slider manually to the right (towards firewall). It goes back fully. I then release D button and move throttle lever to max open position. Nothing happens to the slider... (see enclosed movie). What can be wrong here?
EDIT: I just checked TV cable adjustment and I have weird case. I press D button and move slider manually to the right (towards firewall). It goes back fully. I then release D button and move throttle lever to max open position. Nothing happens to the slider... (see enclosed movie). What can be wrong here?
Last edited by tomaszC4; Dec 19, 2023 at 10:22 AM.
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