[TripleJackInGA]

quote:Originally posted by MichaelDay

As MexicanPT stated, that is common for all four-speed automatics with lock-up torque converters. When the torque converter locks and unlocks it almost feels as if there was a gear change as the rpms will rise as the torque converter unlocks even though you are still in the same gear.

And if you wanna make sure your Torque Convertor is locking and unlocking like it should, go down the road at say a steady 55MPH in top gear (4TH) for a while. While watching the RPMs, just slightly depress the brake. You should see the RPMs go up just slightly.This is the Torque Convertor unlocking, and if you let off the brake again and cruise at a steady rate, you will see it drop slightly again as it locks back up.