Originally Posted by champ5601
Will this lead to transmission damage over time?
The pressure control solenoid gets contaminated with the fine silt from the normal wear of the clutches. When this happens, it can stick and not modulate the shifts correctly. If the shifts are sluggish because of this, the computer will overcompensate and shift hard. If you don't do anything, the sticky solenoid can lead to premature clutch wear and when it shifts hard, I suppose it can stress other parts of the trans.
Should I get it looked at right away?
I would change the oil and filter right away and add a can of Sea Foam Trans Tune. If your problem is mild, this may be all it takes. Otherwise, the dealer will probably recommend a new solenoid ($500 - $700). I installed a $90 shift kit. A shift kit will make it unnecessary for the solenoid to modulate the shift because the accumulators are stiffened up a bit. Thereby relieving the solenoid of this responsibility and bypassing the problem completely.
When I changed the oil and added Trans Tune, the problem went away for only about a month. I did the shift kit last June and nary a hard shift since!
Here'* my post afterward:
2001 Bonneville SE - Dark Bronzemist Metallic - Mods: 180* thermostat, iPod adapter, Digital OnStar Upgrade
Planned Audio System upgrades: Front & Rear 7 Band Equalizer, Amps, Hands Free Bluetooth Cell Phone kit
Planned mods: Front PEM, Ported LIM, Ported Heads, ZZP SR Rockers, Aluminum Gaskets & Reprogram PCM