decided to change to a B&M deep tranny pan which holds 3 quarts more fluid while i did the 15k mile tranny flush. i started to notice a shudder when downshifting out of OD once in a while. i wasn't sure if it was the OD or the torque converter unlocking that caused the shudder. 1 mechanic said it was caused by the fluid breakdown. so after $165 tranny pan, $160 of 5 gallons of redline synthetic ATF and a $28 tranny filter, i know the possible cause of the shudder. inside the pan from the factory was a gray plastic ball/pin w/ gasket that originally plugs the dip stick hole. someone forgot to remove this before the pan was installed and they forced it out by jamming the dip stick down, so there it bounced around in the tranny pan.